Free tool

Mash Bill Scaler

Scale a mash bill from percentages to pounds for any batch. Enter your grain percentages and the total grain weight to get the pounds of each grain. Percentages should add up to 100. This mash bill calculator flags recipes that do not.

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The formula

grain lbs = total batch lbs x (grain percent / 100)

A worked example

Scaling a 75/13/12 bourbon mashbill to a 2,000 pound cook: 1,500 pounds of corn, 260 pounds of rye, and 240 pounds of malted barley. The ratios hold at any batch size, which is what keeps the recipe the same recipe.

Doing this math barrel by barrel? The platform runs the same calculation on every record automatically, reconciled against the books. See it live.

Bourbon must be at least 51% corn by mashbill (27 CFR 5.143). This tool uses the same calculation as the Spirit Sight platform. It is general information, not tax or legal advice.

How do I scale a mashbill to my batch size?
Multiply the total grain weight by each grain percentage divided by 100. For a 1,000 lb batch at 70 percent corn, that is 700 lb of corn.
What is the minimum corn for a bourbon mash bill?
Bourbon must be at least 51 percent corn by mash bill under 27 CFR 5.143. This scaler keeps your percentages explicit so you can confirm the recipe stays compliant.
Do the percentages have to add up to 100?
Yes. If they do not, the calculator flags it so you can correct the recipe before scaling to pounds.
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