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Length converter
Convert pattern and fabric measurements between millimetres, centimetres, metres, inches, feet and yards.
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Free Clothing & Craft
Calculators & Learning Hub
Thoughtful tools for sewing, stitching and making. Less guesswork, more time for the things you love.
Find your starting pointAlways free. For every maker.
MEASURE · MAKE · LEARN
CRAFTNUMA / 01
Find your starting point
Five corners of making. One growing collection of free tools.
Ten free tools across five categories. Choose a tool to see its method, assumptions and worked example.
● Ready to use
Rectangular fabric yardage
Plan fabric length for identical rectangular pieces, including edge allowances, extra fabric and lengthwise shrinkage.
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Rectangular seam allowance
Find the cutting dimensions of a rectangle from its finished dimensions and an equal allowance on every edge.
Open calculator● Ready to use
Stitch & row gauge
Use a measured swatch to estimate stitches and rows for a target rectangle.
Open calculator● Ready to use
Yarn ball count
Calculate how many whole balls cover a known yarn length, with an optional extra allowance.
Open calculator● Ready to use
Garment ease comparison
Compare a finished garment circumference with the corresponding body measurement.
Open calculator● Ready to use
Straight-strip quilt binding
Estimate binding strips and fabric length for a rectangular quilt, including a stated loss at each strip join.
Open calculator● Ready to use
Patchwork square planner
Count equal finished squares to meet or exceed a rectangular quilt size and find their cutting size.
Open calculator● Ready to use
Fabric area converter
Convert square centimetres, square metres, square inches, square feet and square yards.
Open calculator● Ready to use
Yarn length converter
Convert yarn-label lengths between metres, international yards and feet.
Open calculatorEnglish
From pattern to tape measure
A practical guide to converting inches, centimetres and yards without confusing length, fabric quantity and garment fit.
From pattern to tape measure ↗English
Plan rectangular fabric pieces before you buy
A worked fabric layout with seam allowances, usable width, waste and lengthwise shrinkage kept separate.
Plan rectangular fabric pieces before you buy ↗English
Turn a gauge swatch into a stitch plan
Calculate stitch and row counts from a measured sample, then check rounding, pattern repeats and the limits of a rectangular estimate.
Turn a gauge swatch into a stitch plan ↗English
Plan yarn lengths and whole-ball purchases
Convert yarn-label units and calculate whole balls from a known length without confusing weight, gauge or substitutions.
Plan yarn lengths and whole-ball purchases ↗English
Read garment ease without guessing a size
Compare matching body and finished-garment circumferences, including negative ease, without treating the result as a universal sizing chart.
Read garment ease without guessing a size ↗English
Check quilt grids and straight-strip binding
Work through square counts, cutting allowances, quilt perimeter and binding join losses using transparent rectangular geometry.
Check quilt grids and straight-strip binding ↗English
Why fabric area is not the same as roll length
Use square-unit conversions correctly and understand why equal areas can still produce different cutting layouts.
Why fabric area is not the same as roll length ↗No matches. Try “cm”, “inches” or another category.
Learning guides
Our original learning guides are available in English. Reviewed editions in other languages will be added when ready.
Learning guides · English ↗