Raw Fleece Scouring Yield Calculator

Enter your fleece weight and breed to find out how much clean wool you will have after washing, how much water and detergent you need, and how many yards of yarn you can expect to spin. Everything runs in your browser - nothing uploaded.

Clean yield weight Water needed Detergent amount ? Yarn yardage ? Breed yield guide Scouring tips

Scouring Results

Scoured clean weight
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Washing water needed
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litres total
Detergent (Power Scour / Unicorn)
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mL total
Estimated yarn at target WPI ?
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yards (estimated)
Shrinkage from greasy to scoured ?
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Scouring Steps

  1. 1 Fill a basin or tub with the calculated water volume at 60-65 C (140-150 F). Hot water is essential - it dissolves lanolin. Do not use boiling water as it can felt fine wools.
  2. 2 Add the detergent and stir gently to dissolve before adding fibre. Power Scour and Unicorn Fibre Wash are both low-suds, fast-rinsing formulas ideal for wool.
  3. 3 Submerge the fleece and press gently to saturate. Do not agitate or scrub - movement plus heat plus soap causes felting. Leave to soak for 20-30 minutes.
  4. 4 Lift the fleece out without wringing. Drain the basin, refill with water at the same temperature, and rinse the fleece by soaking again for 10-15 minutes. Repeat once more if the water still looks very dirty.
  5. 5 Gently squeeze out excess water, roll in a towel, and press to remove moisture. Lay flat or hang in a mesh bag to air dry. The scoured weight shown above is what you should expect once fully dry.