How do I scale a soap recipe?

Enter your oil percentages and a target total oil weight. The calculator converts percentages to exact weights and recalculates lye and water amounts automatically. This ensures your ratios stay correct at any batch size.

Can I use this for both bar soap and liquid soap?

Yes. Select NaOH for bar soap or KOH for liquid soap. The calculator uses the correct SAP values for whichever lye type you choose.

CraftFormulas

Soap Batch Calculator

Scale your recipe to a target oil weight and get exact amounts for every ingredient.

Oils & Percentages

Total Oil Weight(oz)

Lye Type

Superfat(%)

Water Method

Water:Lye(:1)

Oil Amounts

Coconut Oil (76°)8oz

Olive Oil16oz

Palm Oil8oz

NaOH needed4.46oz

Water needed8.92oz

Total batch weight45.38oz

Scaling Soap Recipes Safely

When you scale a soap recipe, every ingredient has to scale together. You can't just double the oils and keep the same lye amount. This calculator recalculates lye and water from scratch using your exact oil weights and SAP values.

Need to price your batch? Soap Pricing Calculator.