Work out how much fabric a project needs from its size, the fabric width, pattern repeat and waste allowance.
Fabric needed
How to use this tool
Enter project length and width, including hems and seam allowances.
Use the width printed on the bolt, in the same unit.
In advanced options, add the pattern repeat and a waste percentage.
Buy at least the total length shown, rounded up to the shop’s cutting increment.
Formula & worked example
A 150 × 120 cm project on 140 cm fabric with 10% waste needs 1 strip of 150 cm, i.e. 165 cm of fabric.
Limitations — read this before you rely on it
Assumes straight rectangular strips cut along the length; shaped, bias-cut or panelled garments need a pattern layout, not this estimate.
Frequently asked questions
Fabric is sold by length off a roll of fixed width, so a wide project needs several side-by-side strips.
The vertical distance after which a printed motif repeats; each strip needs an extra repeat so motifs align.
10% covers cutting and squaring for simple projects; allow more for matching, nap or directional prints.
No — add your hem and seam allowances to the project length and width first.
Yes, buy the next whole increment the shop sells; dye lots can differ between bolts.