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Home DIY Crafts Calculators

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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Educational estimates only. Results on this page are free educational estimates based on the numbers you enter and standard formulas, not financial advice. Nothing you calculate here is stored.

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