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Fiber Blend Calculator

Calculate fiber blend percentages and weights for spinning and yarn production. Mix ratios for wool, silk, cotton, and synthetic blends.

Use this result well

Inputs that matter
Fiber A Weight, Fiber B Weight, Fiber A Name, Fiber B Name
Output to expect
Fiber Blend Calculator
  • Check the units and required inputs before comparing results.
  • Keep the assumptions with a copied result so you can reproduce the calculation later.
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Reference & details

How it works

Component Weight from Percentage

Multiply total batch weight by each fiber's target percentage. A 100g batch of 70/30 wool/silk needs 70g wool and 30g silk.

Component weight = Total weight × (Percentage ÷ 100)

Percentage from Weights

Weigh each fiber after blending to verify ratios. Adjust by adding more of deficient component.

Percentage = (Component weight ÷ Total weight) × 100

Volume vs Weight Blending

Different fibers have different densities. A cup of silk weighs less than a cup of wool — weight ratios ensure consistent blend percentages.

Always blend by weight, not volume

Updated: July 2026

Example Scenarios

500g total blend: 350g merino top + 150g silk sliver. Card together on drum carder for luxury sock yarn.

60% wool + 25% mohair + 15% nylon for 200g: 120g + 50g + 30g. Verify percentages before carding.

Have 80g wool and need 70/30 blend — total batch = 80 ÷ 0.7 = 114g, add 34g silk to complete ratio.

FAQ

Always by weight. Volume measurements are inaccurate due to different fiber densities, crimp, and preparation (top vs roving vs batts).

Wool/nylon socks: 80/20 or 75/25. Wool/silk luxury: 70/30 or 80/20. Cotton/linen summer: 50/50 or 60/40. Tweed neps: 90/10 main/accent.

Use a digital scale accurate to 0.1g. Calculate each component weight before mixing. For blends under 50g, precision matters more for ratio accuracy.

Yes. Enter label percentages and total skein weight to determine fiber content in grams. Useful for recycling or reproducing commercial blends.

Drum carder: 2–3 passes minimum. Hand carding: 4–6 passes. Blending board: depends on stripe fineness. Always test-spin a sample before committing full batch.

About Fiber Blend Calculator

Creating consistent fiber blends requires accurate weight ratios. Enter target blend percentages and total batch weight to calculate grams or ounces of each fiber component, or determine blend percentages from component weights.