Calculate fabric length for rectangular pieces

Calculate roll length for cutting identical rectangular pieces across a stated usable fabric width.

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ToolFabric Calculator
Input
Output
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How it works

Whole pieces are packed across the roll with floor(fabric width ÷ piece width), and the required piece count determines how many rows are cut. When a vertical print repeat is supplied, each row length rounds up to its next repeat boundary before the rows are totalled.

Formula
pieces per row = floor(usable width ÷ piece width)
rows = ceiling(piece count ÷ pieces per row)
  • A zero repeat means plain fabric; no seam allowance, selvedge, nap percentage, purchase increment, or waste rate is invented.

Worked example

Six 110 × 45 cm pieces on a 140 cm roll
Pack three rectangles across and cut two rows without a print repeat
Input
											Fabric width cm: 140
Piece length cm: 110
Piece width cm: 45
Number of pieces: 6
Pattern repeat cm: 0
Output
												Pieces per row: 3
Rows needed: 2
Fabric length m: 2.2
Pattern repeat cm used: 0

When to use this

Cushion-panel cutting, repeated banner blanks, and equal fabric-strip prototypes use rectangular roll layouts.

Edge cases

  • Curved or differently shaped pattern pieces cannot be represented as identical rectangles.
  • A 4 cm selvedge or damaged edge must be removed from the entered usable width before packing.
  • A one-way motif may require horizontal matching or orientation that vertical-repeat rounding does not model.