Soap Recipe Resizer
Scale any soap recipe up or down while keeping every ratio identical — resize by a multiplier or to a target batch weight and get the new grams for each ingredient. Runs in your browser.
New batch total
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Show the math
Resizing keeps every ratio identical, each ingredient is multiplied by one shared factor, so the soap behaves the same at any batch size:
factor = target total ÷ current total (or your multiplier)
new weight = old weight × factor
Scaling preserves your superfat and lye ratio, but always recheck the lye against a trusted calculator after resizing, and confirm the new volume fits your mould.
What this does
A soap recipe resizer scales any recipe up or down while keeping every ratio identical — resize by a multiplier or to a target batch weight.
How to use it
- Enter your current recipe.
- Choose multiplier or target weight.
- Enter the value.
- Read the new grams for each ingredient.
How it works
One shared factor multiplies every line, so superfat and lye ratios stay the same. Always recheck the lye and that the new volume fits your mould.
new amount = ingredient × shared factor
Understanding your result
Scaling multiplies every line by one shared factor so the ratios and superfat stay identical, but always recheck the resulting lye amount and confirm the new batch volume actually fits your mould before mixing. Round to amounts your scale can read accurately, since a small rounding error on lye matters far more than the same error on a fragrance.
Example
Doubling a 1,000 g recipe gives a 2,000 g batch with identical ratios.
Sources & methodology
Last updated .
Frequently asked questions
How does resizing keep the recipe balanced?
Every ingredient is multiplied by one shared factor, so all ratios — including your superfat and lye — stay exactly the same at any batch size.
What is the difference between the two modes?
Multiplier scales each line by a number you choose; target total scales the whole recipe to a finished batch weight you specify.
Do I still need to recheck the lye?
Yes — scaling is proportional, but always reconfirm the lye against a trusted calculator and check the new volume fits your mould.
Is my recipe stored?
No — everything is calculated locally in your browser.
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