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 to proof gallons with the proof gallon formula, PG = wine gallons x proof / 100, the figure the TTB taxes and reports. Same audited math as Spirit Sight.
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 excise tax and savings vs the flat rate. Same audited math as Spirit Sight.
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. Same audited math as Spirit Sight.
CBMA Excise Liability Forecaster
Free CBMA excise forecaster: project your federal excise tax for the year as cumulative proof gallons removed cross the CBMA tiers, plus the marginal rate on planned removals. Same audited math as Spirit Sight.
Spirit Dilution Calculator
Free spirit dilution calculator: add water to proof down to a target ABV or proof. Calculates final volume, final proof, and the exact water to add. Proof-gallon conserving, same audited math as Spirit Sight.
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. Same audited math as Spirit Sight.
Bottle Yield Calculator
Free bottle yield calculator: how many bottles and cases you get from a barrel after proofing down and processing loss. Calculates water to add and usable volume. Same audited math as Spirit Sight.
Sugar Wash ABV Calculator
Free specific gravity ABV calculator: estimate ABV and proof of a sugar wash from original and final gravity, plus attenuation. ABV = (OG - FG) x 131.25. Same audited math as Spirit Sight.
Grain Yield Calculator
Free grain yield calculator: estimate the proof gallons a grain bill will produce from your expected yield per bushel, and how many barrels that fills. Planning estimate, same math as Spirit Sight.
Mash Bill Scaler
Free mash bill calculator and scaler: turn grain-bill percentages into exact pounds for any batch size. Enter your corn, rye, wheat, and malt percentages and total batch weight.
ABV to Proof Converter
Free ABV to proof calculator and proof to ABV converter: proof = ABV x 2, ABV = proof / 2, plus approximate alcohol by weight. Instant two-way liquor proof conversion for distillers.
Alcohol by Weight (ABW) Calculator
Free alcohol-by-weight calculator: convert ABV to ABW and proof. ABW is lower than ABV because alcohol is lighter than water. Instant ABV to ABW conversion, same math as Spirit Sight.
Angel's Share Calculator
Free angel's share calculator: project proof-gallon loss to evaporation over the years of aging, and the dollar value lost, at your annual loss rate. Same audited math as Spirit Sight.
Barrel Cost Amortization Calculator
Free barrel cost calculator: model the fully-loaded true cost per barrel and per proof gallon of an aging barrel, including the barrel, fill, carrying cost over years, and the angel's share.
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