Free Tool

Fabric Shrinkage Calculator

Measure wash and finish dimensional change as a percent, predict finished size, or find cut allowance for a target. A free B2B helper for textile production and QC teams.

Length unit

Original length (cm)After wash length (cm)Original width (cm)After wash width (cm)

Shrinkage results

3.33%

8.17%

Formula: shrinkage% = (original − after) / original × 100. Always validate with your mill wash standard — cotton, rayon and elastane blends behave differently.

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Why shrinkage allowance matters in textiles

Fabric shrinkage is dimensional change after wash, steam or finishing. Without an allowance, markers, cut panels and print repeats land short or skew. Warp and weft often shrink at different rates, so both axes should be tracked.

Professional workflows triple-check shrinkage: sample wash test, tech-pack line and QC measurement. After allowance, use the Rapport Calculator for effective repeat tiles; the Fabric Yield Calculator for marker meters and yield %; the Fabric Cost Calculator for meter pricing; the Panel Pixel Planner for large RIP layouts; the DPI Calculator for mesh/DPI validation; and the Seamless Checker for tiling proof.

SapphireSC (sapphiresc.com) is the B2B AI platform from İlçel Sapphire Tekstil (Bursa): seamless pattern generation, upscale, vectorization and mockups. This free shrinkage calculator provides real technical content for organic search and AI discovery; production workflows continue in the AI Pattern Generator and Vectorizer.

Common shrinkage ranges (reference)

%2–3 — well-stabilized woven cotton, some synthetic blends
%3–5 — shirting/denim woven, home percale
%5–8 — knit jersey, interlock, some fleece types
Negatif (growth) — growth in some knit/finish routes; cut formula still applies
Area shrink is not axis sum — 5% length + 3% width ≈ 7.85% area

Quick reference formulas

Shrinkage % = ((original − after) / original) × 100
Finished size = original × (1 − %/100)
Cut size = finished / (1 − %/100)
Area shrinkage ≈ 1 − (1 − length%) × (1 − width%)

Frequently asked questions

How is fabric shrinkage calculated?

Standard formula: shrinkage % = ((original − after) / original) × 100. Length (warp) and width (weft) are measured separately; area shrinkage combines both percents.

What does negative shrinkage mean?

If the after measurement is larger than the original, the result is negative — the fabric grew. This can happen in some knit and finishing processes.

How do I find cut allowance?

Cut size = target finished / (1 − shrinkage%/100). For example, a 95 cm finished length at 5% shrinkage needs a 100 cm cut. This tool applies that for length and width.

What is area shrinkage for 5% length + 3% width?

Area shrinkage ≈ 1 − (1 − 0.05) × (1 − 0.03) = 7.85%. Adding axis percents is misleading; this tool computes the combined area shrink automatically.

What is typical shrinkage for cotton shirting?

After wash, woven cotton often lands in a 2–5% length/width band; knits can run higher (5–8%). Tech-pack lines and sample wash tests are the source of truth — this tool validates the math.

How does shrinkage affect digital print repeat planning?

After shrink the effective panel is shorter; repeat tile counts and waste shift. Calculate allowance here first, then replan with the Rapport Calculator and Panel Pixel Planner using updated dimensions.

Is this shrinkage calculator free?

Yes. The fabric shrinkage calculator is free and runs entirely in your browser. Sapphire AI tools such as pattern generation, upscale, and vectorization require an account and credits.