Fabric Cutting Layout Calculator
Across the width you get ⌊110 ÷ 40⌋ = 2, down the length ⌊200 ÷ 50⌋ = 4 rows, so eight pieces. Both divisions round down, which is why the leftover 30 cm strip does not count — squeezing smaller pieces into it is a separate calculation.
Your numbers
Pieces you get
8
Per row
2
Formula
Pieces you get = ⌊Fabric width needed ÷ Piece width⌋ × ⌊Fabric needed ÷ Piece length⌋
Enter cut sizes with the seam allowance already included. Working from finished sizes raises the count but leaves nothing to sew with. Unwashed fabric also loses its shrinkage before you cut.
What to enter
| Input | Default | Accepted range |
|---|---|---|
| Fabric width (cm)The fabric width; if it is sold folded, enter the opened width. | 110 | 1 and up |
| Fabric needed (cm)Fabric length to buy, along the grain rather than across. | 200 | 1 and up |
| Piece width (cm)One piece across, as cut — seam allowance included. | 40 | 1 and up |
| Piece length (cm)One piece along, as cut — seam allowance included. | 50 | 1 and up |
Step by step
Quick reference table
Results when only Fabric width (cm) changes and everything else stays put.
| Fabric width (cm) | Pieces you get | Per row |
|---|---|---|
| 55 | 4 | 1 |
| 82.5 | 8 | 2 |
| 110 | 8 | 2 |
| 165 | 16 | 4 |
| 220 | 20 | 5 |
What each result means
| Result | At default values |
|---|---|
| Pieces you getHow many pieces that fabric yields. | 8 |
| Per rowPieces that sit side by side across the width. | 2 |
Common mistakes
Enter cut sizes with the seam allowance already included. Working from finished sizes raises the count but leaves nothing to sew with. Unwashed fabric also loses its shrinkage before you cut.
Glossary
- Fabric width
- The fabric width; if it is sold folded, enter the opened width.
- Fabric needed
- Fabric length to buy, along the grain rather than across.
- Piece width
- One piece across, as cut — seam allowance included.
- Piece length
- One piece along, as cut — seam allowance included.
- Pieces you get
- How many pieces that fabric yields.
- Per row
- Pieces that sit side by side across the width.
Frequently asked questions
Q. How is Fabric Cutting Layout Calculator calculated?
Pieces you get = ⌊Fabric width needed ÷ Piece width⌋ × ⌊Fabric needed ÷ Piece length⌋ — Across the width you get ⌊110 ÷ 40⌋ = 2, down the length ⌊200 ÷ 50⌋ = 4 rows, so eight pieces. Both divisions round down, which is why the leftover 30 cm strip does not count — squeezing smaller pieces into it is a separate calculation.
Q. Can you walk through an example?
With Fabric width 110cm, Fabric needed 200cm, Piece width 40cm, Piece length 50cm, the answer is Pieces you get 8.
Q. What do I need to enter?
Enter Fabric width, Fabric needed, Piece width, Piece length. The result recalculates as you type, and an empty box counts as zero.
Q. How much does the answer move if I change a number?
Changing only Fabric width (cm) moves the answer to Fabric width (cm) 55 → Pieces you get 4 and Fabric width (cm) 220 → Pieces you get 20. The table below lays out five steps.
Q. How are the numbers rounded?
Money is shown to the nearest whole unit, percentages to one decimal place and everything else to two. What you see is rounded; the calculation itself carries the unrounded value forward.
Q. Anything to watch out for?
Enter cut sizes with the seam allowance already included. Working from finished sizes raises the count but leaves nothing to sew with. Unwashed fabric also loses its shrinkage before you cut.
Related calculators
Materials differ in density and absorption. If your label states a figure, use it — the defaults here are only common values.