Sewing Calculators
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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Other calculator categories
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.