Distillery calculators, free
Proof gallons, excise tax, dilution, gauging, yield, and more - the same calculations Spirit Sight runs inside the platform. No login, no email.
Proof Gallon Calculator
Free proof gallon calculator: convert wine gallons and proof to proof gallons (PG = wine gallons x proof / 100), the figure the TTB taxes and reports. Instant, accurate.
Federal Excise Tax Calculator (CBMA)
Free CBMA federal excise tax calculator for distilled spirits: tiered rates of $2.70, $13.34, and $13.50 per proof gallon. See your tax and savings vs the flat rate.
TTB Gauging Calculator (Temperature Correction)
Free TTB gauging calculator: correct a hydrometer proof reading to true proof at 60F using TTB Gauging Manual Table 1. Enter observed proof and temperature.
Spirit Dilution Calculator
Free spirit dilution calculator: add water to reach a target proof. Calculates final volume, final proof, and the exact water to add. Proof-gallon conserving.
Spirit Blending Calculator
Free spirit blending calculator: combine two spirits of different proofs and volumes to find the blended proof, ABV, and each spirit's proof-gallon contribution.
Bottle Yield Calculator
Free bottle yield calculator: how many bottles and cases from a barrel after proofing down and processing loss. Calculates water to add and usable volume.
Sugar Wash ABV Calculator
Free fermentation calculator: estimate ABV and proof from original and final gravity, plus attenuation. ABV = (OG - FG) x 131.25.
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