Weaving shrinkage calculator
Measure sample loss or growth and calculate the starting size needed for a finished target.
Enter your measurements
Your result
How the calculation works
loss = (before − after) ÷ before; starting size = target × before ÷ after
Run width and length separately. The sample may grow, producing a negative loss; that is valid here. The main planner accepts losses from 0–80%, so use the calculated starting measurement directly for projects with growth.
Full calculation methodologyWorked example
A sample that changes from 10 to 8.5 has 15% loss. A finished target of 20 requires 23.53 before finishing, not 23.
Use the complete weaving planner to connect the dimensions, allowances, and yarn quantities for one project.
Reference: Gist sample ratios. Calculations run locally.
Continue your plan
Warp length calculator
Find how long to wind each end, including shrinkage, take-up, loom waste, and gaps.
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Calculate body ends, round up to a complete threading repeat, and add floating ends.
Sample to finished fabric weight calculator
Scale a finished sample’s mass by area to estimate the mass of a larger piece of cloth.