Why Use This Tool?
Get an accurate length based on your *actual* pattern pieces.
Save money by not overbuying material.
Test "what-if" scenarios: 'Will my pattern fit on this 90cm wide linen?'
Works with both Metric (cm) and Imperial (in) units.
Automatically adds your chosen seam allowance for quick entry.
How to Use It
Step 1
Select your units (Metric or Imperial).
Step 2
Enter the width of your fabric roll (e.g., 150 cm or 60 in).
Step 3
Set a default seam allowance (the tool adds this to each piece).
Step 4
Add your first pattern piece's length, width, and quantity.
Step 5
Click "+ Add Piece" for every main piece in your pattern.
Step 6
Click "Calculate" to see the total length of fabric required.
Frequently Asked Questions
How does this calculator work?
It uses a "bin packing" algorithm. It lays out your tallest pieces first and tries to fit shorter pieces next to them, up to the fabric width. It then starts a new "row" and adds the lengths together.
What about pieces cut "on the fold"?
For a piece cut on the fold, enter its **full, unfolded width** and its length. For example, a 30cm wide pattern piece marked "on the fold" should be entered as 60cm wide.
Does this account for fabric grain or one-way patterns?
This tool assumes all pieces are laid out in the same direction (along the grain). It does not rotate pieces to fit. For one-way patterns, this estimate is accurate.
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