Free craft tools
Craft Calculators
Every calculator here answers a question that comes up before you buy materials: how much yarn, how much fabric, how many board feet, how much wax, how much resin, and what to charge when the piece is finished. Enter your own numbers, see exactly how the result is worked out, and change anything you like. Nothing is stored and no account is needed.
Crochet & Knitting
Yarn quantity, gauge, hook and needle sizes, and the cost of a project. Start with the yarn calculator to find out how many skeins you actually need.
Blanket Yarn Calculator
Yarn estimates for bed and throw blankets by size, with the standard blanket dimensions already filled in.
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Crochet Hook Size Converter
Convert crochet hook sizes between metric millimetres, US letter sizes and the old UK numbering.
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Crochet Project Cost Calculator
Add up the yarn, supplies, pattern and labour costs of a crochet project, then see a suggested selling price.
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Gauge Calculator
Turn a measured swatch into stitches and rows per inch and per centimetre, and see the stitch count for a width.
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Knitting Needle Size Converter
Convert knitting needle sizes between metric millimetres, US numbers and old UK numbers.
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Knitting Project Cost Calculator
Total the cost of a knitting project including needles and notions, then see a suggested selling price.
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Project Time Estimator
Estimate how many hours a knitting or crochet project will take from its stitch count and your working speed.
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Scarf Yarn Calculator
Yarn estimates for scarves, cowls and infinity scarves by style, with the usual dimensions prefilled.
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Stitch Calculator
Work out how many stitches to cast on or chain, and how many rows to work, for any width and height.
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Sweater Yarn Calculator
Yarn estimates for sweaters and cardigans by size, sleeve style and yarn weight, with a breakdown by piece.
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Yarn Calculator
Work out how much yarn a project needs from its finished size, your stitch gauge and the yarn weight you plan to use.
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Yarn Length Calculator
Convert between yards and metres, and work out how much length is left on a part skein by weighing it.
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Yarn Weight Converter
Convert between the US yarn weight numbers, the UK and Australian ply names, and wraps per inch.
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Sewing
Fabric yardage, seam allowances, curtain and quilt quantities, thread estimates and garment sizing, in both metric and imperial.
Clothing Measurement Converter
Convert body measurements between inches and centimetres, and read them across US, UK and European clothing size systems.
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Curtain Fabric Calculator
Work out how much fabric curtains need from the window width, the fullness ratio, the drop and the pattern repeat.
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Fabric Calculator
Work out how much fabric to buy for a project from its finished size, the seam allowance you are cutting and the width of the bolt you are buying.
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Fabric Cost Calculator
Cost a length of fabric at the price per yard or per metre, add notions and thread, and see the total and the cost per finished item.
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Fabric Length Converter
Convert fabric lengths between inches, feet, yards, centimetres and metres, with the common fabric fractions shown as decimals.
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Fabric Yardage Calculator
Yardage from finished measurements for a garment, adding seam allowance, hem, layout waste and pattern repeat matching.
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Pattern Size Converter
Convert between womenswear letter sizes, US, UK and European numeric sizes, and the chest, waist and hip measurements each one is drafted for.
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Quilt Fabric Calculator
Work out the squares, strips, binding and backing a quilt needs from its finished size and the size of one block.
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Seam Allowance Calculator
Add a seam allowance to a finished measurement to get the cut size, and work back from a cut size to the finished size it produces.
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Sewing Project Cost Calculator
Total a sewing project from fabric, notions, pattern and labour, then see the production cost and a suggested selling price.
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Thread Calculator
Estimate how much thread a seam consumes from its length and the stitch type, and work out how many bobbins or spools that needs.
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Woodworking
Board feet, lumber volume, plywood sheets, cut lists and shelf spacing. Board feet is the measurement lumber is priced in, so start there.
Board Feet Calculator
Board feet from nominal dimensions, with a running total, and the dressed size the board actually measures.
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Cut List Calculator
Total board feet and linear length for a list of parts, with quantity for each part.
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Cut List Optimizer
Estimate how many stock boards a cut list needs, allowing for saw kerf, end trimming and waste.
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Furniture Dimension Calculator
Standard heights and depths for tables, desks, chairs and counters, and a check on a dimension you already have.
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Lumber Calculator
Work out board feet, cubic volume and linear length for sawn lumber in inches, feet, centimetres or metres.
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Material Waste Calculator
How much extra material to buy for a waste percentage, and what that waste actually costs you.
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Plywood Calculator
How many sheets of plywood or sheet goods you need for an area, with sheet size and waste allowance.
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Shelf Spacing Calculator
Divide a height into evenly spaced shelves, allowing for the thickness of each shelf.
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Wood Board Calculator
How many boards of a given size you need to cover an area, or to yield a run of a given length.
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Wood Project Cost Calculator
Total the lumber, hardware, finish, consumables and labour in a woodworking project, then see a suggested price.
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Wood Weight Calculator
Weight of a board or a whole project from its volume and the density of the species.
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Jewelry Making
Bead counts, bracelet and necklace lengths, ring size conversion, wire length and pricing for handmade jewellery.
Bead Calculator
Work out how many beads fill a strand length, how many beads fit in an inch, and how many strands a pack of beads will make.
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Bead Pattern Calculator
Work out how many beads of each colour a repeating pattern needs for a given number of repeats, plus the total bead count and the thread length.
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Bracelet Size Calculator
Turn a wrist measurement into a bracelet length, with the allowance for the clasp type and the bead size you are using.
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Handmade Jewelry Pricing Calculator
Price a handmade piece three ways, cost plus, market rate and premium, with the reasoning for each tier shown next to the number.
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Jewelry Material Cost Calculator
Add up the metals, findings and stones in one piece of jewellery from quantity and unit price, and work out the cost per gram of wire or sheet.
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Jewelry Pricing Calculator
Turn the cost of making one piece of jewellery into a break even price, a retail price and the wholesale and premium prices that follow from it.
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Jewelry Profit Calculator
Work out the profit on one piece and on a whole batch, the margin it leaves, and what you actually earn per hour after marketplace fees.
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Necklace Length Guide
Turn a necklace style into a finished length and a bead or link count for the size of bead you are using.
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Ring Size Calculator
Take a ring measurement and get the closest size in US, UK, European and Japanese systems, with the band width allowance and a mandrel check.
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Wire Length Calculator
Work out the wire needed for wrapped loops, coils, chain links or rings, from the dimensions and the wire gauge, with a waste allowance.
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Candle Making
Wax quantity, fragrance load, jar fill, batch scaling and candle pricing. Work out the wax for a whole batch before you melt anything.
Candle Batch Calculator
Scale a candle recipe up or down to the number of candles you want to pour, with wax, fragrance and an allowance for the whole batch.
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Candle Cost Calculator
Add up what one candle costs to make, from wax and fragrance to wick, jar, dye and label, and see the cost of the whole batch.
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Candle Label Size Calculator
Work out the label length and height for a round or square container, allowing for wrap overlap and a safe margin.
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Candle Material Cost Calculator
Total the materials for a candle batch and see the cost per unit, with each material as a share of the total.
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Candle Pricing Calculator
Turn a candle production cost into a retail price, a wholesale price and a premium price, with the profit at each.
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Candle Profit Calculator
Work out the profit per candle and for the batch after marketplace and payment fees, with the break even price.
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Candle Wax Calculator
Work out the wax and fragrance oil for a batch of container candles from the container volume, the fill level, the wax type and the fragrance load.
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Fragrance Oil Calculator
Turn a wax weight into the right amount of fragrance oil in ounces, grams and millilitres, with the usual load range for your wax.
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Jar Fill Calculator
Work out how much wax fills a jar to a given fill line, and how many jars a batch of wax will fill.
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Wax Volume Calculator
Convert between wax weight and wax volume for a chosen wax type, in ounces, pounds, grams, fluid ounces and millilitres.
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Soap Making
Mould volume, batch scaling, ingredient and packaging costs, and soap pricing. Planning tools only: always verify a formulation with a reliable lye calculator.
Soap Batch Scaling Calculator
Scale a soap recipe up or down by a factor or to a target number of bars, keeping every percentage in step.
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Soap Batch Size Calculator
Turn a bar count and bar weight, or a mould volume, into the oil, water, fragrance and lye weights a soap batch is built from.
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Soap Ingredient Cost Calculator
Cost the oils, lye, water, fragrance and colour in a soap batch, per batch and per bar.
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Soap Label Calculator
Label size for a rectangular bar or a round slice from its dimensions, with the wrap allowance, and how many labels a sheet yields.
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Soap Mold Volume Calculator
Volume of a rectangular, cylindrical or loaf soap mould in cubic inches and millilitres, and the batter weight it holds at 0.4 ounces per cubic inch.
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Soap Packaging Cost Calculator
Cost the boxes, wraps, labels and tape for a soap batch, per batch and per bar.
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Soap Pricing Calculator
Turn the production cost of a bar into a retail, wholesale and premium price, with the profit at each and the margin.
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Soap Profit Calculator
Profit per bar and per batch after marketplace and payment fees, with the margin, the break even price and the effective hourly earnings.
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Resin & Epoxy
Resin volume for rectangular, circular and cylindrical moulds, the mixing ratio, coating coverage and the cost of a pour.
Epoxy Volume Calculator
Compare what a mould or cavity holds against the pour you are planning, and see the shortfall or the surplus before you mix.
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Mixing Ratio Calculator
Split a batch of resin into part A and part B for any ratio, by volume and by weight, with the percentage each part takes.
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Mold Volume Calculator
Work out the volume of a silicone or wooden mould from its shape and dimensions, and how many millilitres of resin it holds.
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Resin Calculator
Work out the millilitres and grams of mixed resin a mould needs, and split it into part A and part B at your ratio.
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Resin Coating Calculator
Work out the resin volume and weight to coat a table top, a canvas or a small piece at a given thickness, per coat and in total.
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Resin Cost Calculator
Total the resin, hardener, pigment, inclusions, mould and consumables for a project and see the cost of each piece.
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Resin Material Waste Calculator
Work out how much extra resin to mix for a waste percentage, what the waste costs, and the size of mixing cup you need.
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Resin Project Pricing Calculator
Turn the cost of a resin piece into a retail, wholesale and premium price, with the profit at each.
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Resin Weight Calculator
Convert between the volume and the weight of a resin mix at a density you choose, in millilitres, litres, grams and kilograms.
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Table Resin Calculator
Work out the resin for a table top or a river table pour: the area, the volume per coat, the number of coats and the total including a dam allowance.
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Paper Crafts
Paper sizes and weights, card and envelope dimensions, print margins, invitation layouts and paper cost per sheet.
Card Size Calculator
Turn a folded card size into the flat sheet it is cut from, with the panel width, the finished size and the card stock to use.
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Envelope Size Calculator
Find the envelope that fits a finished card, with the clearance it needs, and check the thickness against the postage bands.
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Invitation Size Generator
Pick an invitation size, envelope and insert set, and get the card sizes, the envelope code and the cutting list for the whole suite.
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Origami Paper Calculator
Find the largest square you can cut from a sheet, how many squares it holds, and how many folds the paper will realistically take.
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Paper Cost Calculator
Work out the cost of one sheet, one A4 equivalent and one finished piece from the price of a pack or a ream.
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Paper Weight Calculator
Convert paper weight in gsm to thickness in millimetres and microns, and work out what one sheet or a whole job weighs.
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Print Margin Calculator
Work out the safe printable area of a sheet after the printer margins, and the bleed and safe zone for a full bleed design.
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Printable Layout Planner
Plan a label, sticker or tag sheet: how many fit, what they cost each and what the sheet leaves unused.
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Scrapbook Layout Planner
Plan how many photographs or elements fit a scrapbook page, with the gaps, borders and journaling space allowed for.
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Sheet Yield Calculator
Work out which sheet size cuts the cards or inserts you want, how many fit on one sheet, and how much paper is left over.
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Leather Craft
Leather area and cost, belt and strap lengths, thickness conversion, stitch spacing and thread length for hand sewing.
Belt Length Calculator
Work out the strap length to cut for a belt, from the waist measurement, the buckle and the tip you want.
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Handmade Leather Pricing Calculator
Price a leather item on MARGIN, with marketplace fees taken off the selling price and a clear warning when the numbers cannot work.
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Leather Area Calculator
Work out the usable area of a hide and how many projects it holds, once the unusable belly, neck and defects are taken off.
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Leather Cost Calculator
Cost a piece of leather by area or by weight, with the unit conversions and the waste allowance built in.
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Leather Material Waste Calculator
See how much of a hide becomes product, what the offcuts and the unusable parts cost, and what the waste adds to each item.
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Leather Project Pricing Calculator
Price a leather project from the material and the hours it took, using a clear markup on cost.
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Leather Thickness Converter
Convert leather thickness between ounces, millimetres, inches and gauge, and check what the leather suits.
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Pattern Scaling Tool
Scale a leather pattern up or down and see what happens to the area, the leather you need and the cost.
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Stitch Spacing Calculator
Work out stitch count, holes per inch and the pricking iron to use for a seam of a given length and spacing.
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Thread Length Calculator
Work out how much thread a saddle stitched seam needs, in both directions, with the waste and the needle loading allowed for.
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Handmade Business
Pricing, cost, profit, wholesale, break-even and marketplace fees. The tools to answer what should I charge and what will I actually keep.
Break Even Calculator
Find the number of units a stall, a range or a workshop has to sell to cover its fixed costs, after fees.
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Commission Calculator
See what a marketplace commission really takes, compare two platforms, and find the price needed to keep your margin.
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Craft Fair Profit Calculator
Work out whether a craft fair is worth doing, from the stall fee and the travel to the profit per sale.
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Custom Order Pricing Calculator
Quote a bespoke order from the design time, the materials and the risk, with the deposit and the fees worked out.
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Discount Calculator
See what a discount really costs in margin, and what the price must be to give one without losing money.
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Inventory Calculator
Work out what your stock is worth, how fast it turns over, and when to make or order more.
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Labor Cost Calculator
Put a figure on the hours a piece takes, with the prep, the finishing and the admin time that usually goes uncounted.
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Packaging Cost Calculator
Add up what one parcel of packaging costs, per unit and per order, and see what share of the price it takes.
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Product Cost Calculator
Add up what one handmade item actually costs to make, with the waste share and the overhead included.
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Profit Margin Calculator
See the difference between a margin and a markup on the same cost, and price from either one deliberately.
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Retail Price Calculator
Set a retail price from a wholesale price using a shop multiple, and see the margin that leaves at each end of the chain.
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Shipping Cost Calculator
Work out what it costs to post one order, including the packing, the insurance and the dimensional weight.
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Wholesale Price Calculator
Work backwards from the retail price to the wholesale price a shop needs, and check the profit at both.
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Home DIY Crafts
Paint quantity, wall area, tile counts, curtain drop and picture hanging heights for craft projects that end up on a wall or a floor.
Concrete Calculator
Concrete volume for a slab or footing, the weight, and the cement, sand and aggregate to mix it yourself.
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Flooring Calculator
Floor area, cut waste, packs to buy and underlay for laminate, vinyl, tile or solid wood flooring.
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Grout Quantity Calculator
How many kilograms of grout a tiled area needs from the tile size, the joint width, the tile thickness and the area.
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Paint Quantity Calculator
Work out how many litres or gallons of paint a room needs from its dimensions, the openings and the number of coats.
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Picture Frame Mount Calculator
The mount and frame sizes for a picture, with the traditional weighted bottom edge for a landscape piece.
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Picture Hanging Calculator
Work out the exact height for a picture hook, the spacing for a group, and the layout that keeps a gallery level.
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Room Paint Cost Calculator
What it costs to paint a room, including a primer coat, the tins to buy and the cost per square metre.
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Shelf Bracket Spacing Calculator
How many brackets a shelf needs and how far apart to fix them, from the shelf material, thickness and expected load.
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Tile Quantity Calculator
Calculate how many tiles a floor or wall needs, including grout lines, cuts and a breakage allowance.
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Wall Area Calculator
The paintable and paperable wall area of a room, with doors, windows and a waste allowance taken off.
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Wallpaper Calculator
How many rolls of wallpaper a room needs, with pattern repeat, drop matching and door and window deductions handled.
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Painting & Art
Canvas and surface area, paint coverage, medium mixing ratios, frame sizes and the cost of a piece.
Artwork Pricing Calculator
Price an original painting by area, medium and reputation, with the gallery commission shown honestly.
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Artwork Shipping Cost Calculator
The packed size, volumetric weight and shipping tier for a framed or unframed artwork, with the packing allowance.
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Canvas Area Calculator
Surface area of a canvas, the fabric to buy with the wrap included, and the standard size it matches.
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Canvas Depth Calculator
The canvas to cut for a stretched canvas, from the finished size, the wrap allowance and the edges being wrapped.
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Canvas Stretcher Calculator
Bar lengths, mitre angles and bracing for a stretcher frame, and the canvas to cover it.
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Frame Size Calculator
The frame, mount and glazing sizes for a picture, plus the moulding length and the visible image area.
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Fresco Secco Plaster Calculator
The lime plaster, pigment and water for a fresco secco panel, from the area, the coat thickness and the pigment load.
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Gold Leaf Calculator
How many leaves of gold or metal leaf a surface needs, with the overlap, the books to buy and the cost.
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Paint Coverage Calculator
How far a quantity of artist paint will go, how much a surface needs, and how thin a glaze can be taken.
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Paint Mixing Ratio Calculator
Work out how much medium, water or thinner to add to a quantity of paint at a given ratio.
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Paint Volume Mixing Calculator
Split a total volume of mixed paint into pigment, medium and water at a given ratio, by volume and by weight.
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Pottery & Clay
Clay weight for a form, shrinkage allowance, glaze quantity, kiln load planning and the cost of a firing batch.
Ceramic Tile Cost Calculator
The material and firing cost of a batch of hand-made tiles, per tile and per square metre.
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Clay Shrinkage Calculator
Convert between wet and fired dimensions, and see what a linear shrinkage does to the volume and the capacity.
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Clay Weight Calculator
How much wet clay a wheel thrown or hand built form needs, worked out from the surface area and the wall thickness.
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Glaze Quantity Calculator
Glaze needed for a batch of pots, the dry glaze powder to make it, and the bucket size to mix it in.
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Kiln Cost Per Firing Calculator
The electricity cost of one firing and of each piece in it, from the kiln power, the duration and the duty cycle.
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Kiln Load Calculator
How many pieces fit on the kiln shelves, how many firings a batch needs, and the firing cost per piece.
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Pottery Cost Calculator
Cost one pot from the clay, glaze, firing and your own time, with a suggested retail price.
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Pottery Glaze Mixing Calculator
Scale a dry glaze recipe to fill a bucket at a target specific gravity, with the water and the material breakdown.
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Pottery Shrinkage Scale Calculator
Work backwards from a target fired size to the wet size to throw, and forwards from a thrown size to what it will fire to.
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Throwing Dimensions Calculator
Work out the diameter and height a lump of clay can make, and the clay needed for a shape you have in mind.
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Wheel Throwing Time Calculator
The wheel time for a batch and a realistic calendar including drying, bisque and glaze firing.
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Floral & Decoration
Stem counts for arrangements, garland and arch quantities, vase proportions and the cost of a floral project.
Arch Flower Calculator
Stem counts and cost for a floral arch or a moongate, from a light trim to a full asymmetric design.
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Bouquet Size Calculator
The finished width and stem count of a hand tied bouquet for a given vase, style and budget.
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Centerpiece Count Calculator
How many centerpieces a venue needs and what each costs, from the tables, the seating and the flower budget per table.
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Corsage and Boutonniere Calculator
Focal flowers, filler sprigs, leaves, wire and stem wrap for a buttonhole or a corsage, by style and quantity.
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Dried Flower Weight Calculator
The fresh weight of flowers needed for a target weight of dried flowers, from the weight loss the flower type gives.
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Floral Cost Calculator
Cost a floral job from stems, foliage, mechanics and labour, and see what a price per stem really earns.
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Floral Preservative Calculator
Flower food and water for a set of vases, with the water volume worked out from the vase dimensions.
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Flower Arrangement Calculator
Plan a full arrangement by width, depth and height, with a stem count for each level and a cost per arrangement.
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Flower Substitution Calculator
What a substitute flower costs in stems and money when the original is unavailable, by size ratio and price.
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Garland Length Calculator
Stems, bunches and foliage for a garland, with the overlap and the hanging allowance built in.
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Stem Count Calculator
How many stems a vase arrangement needs, from the opening diameter, the density you want and the bunch size.
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General Crafting
Measurement conversion, material quantities, project planning, time estimates and cost breakdowns that apply to any craft.
Cost Breakdown Calculator
Split the cost of any craft project into materials, labour, packaging and overhead, and see the true cost per item.
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Craft Hourly Rate Calculator
The hourly rate a maker needs to charge, from a target income, the hours worked and the share of them that is billable.
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Material Quantity Calculator
Any craft material, from your own coverage rate: how much the project uses, and how many packs to buy.
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Material Substitution Calculator
Convert a quantity of one material into the equivalent amount of a substitute, using a yield or coverage ratio you supply.
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Measurement Converter
Convert length, area, volume, mass and temperature between metric, imperial and US units, and copy the value into any craft.
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Project Deadline Planner
Whether a project can be finished by a date, the weekly hours it really needs, and a plain answer when it cannot.
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Project Time Calculator
Work out any craft project in hours, sessions and weeks from your own measured working rate.
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Scale Converter
Scale a recipe, a pattern or a materials list by a factor, or from one batch size to another.
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Stash Value Calculator
The replacement value of a materials stash by category, with a total, a share for each and an honest use rate.
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Unit Price Comparator
Which pack size is really cheaper per unit, once the surplus you will never use is taken into account.
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Waste Percentage Calculator
Work out the waste rate you actually achieved, from what you bought and what the project used, and what that waste cost.
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About these calculators. Every tool here is a free planning estimate. The results are based only on the numbers you enter and on published reference figures, and every page states its assumptions plainly. Material quantities always deserve a test piece before you commit a full project to them, and nothing you type is stored: your calculation stays in the page and nowhere else.