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DistilCalc
40 free distilling calculators, audited against NIST
DistilCalc is a free suite of 40 calculators and 41 guides for home distillers, mead makers, and fermenters. Dilution, cuts planning, temperature correction, yeast pitch rates, nutrient dosing, priming, mash steps, and three still simulators built on real vapor-liquid equilibrium data. No signup, no paywall, works offline. In August 2026 every formula was audited against primary sources (NIST Circular 19, OIML R 22, ICUMSA, the TOSNA protocol) and the audit is public on the methodology page.
Hi Product Hunt! I'm Cameron, a chemistry student from Belgium and a home fermentation hobbyist.
DistilCalc started because I kept catching wrong numbers in the hobby's calculators. The breaking point: I discovered that the alcoholmeter temperature correction tables circulating on most distilling sites are wrong in direction (they correct warm readings up instead of down) and off by about half in magnitude. Mine had absorbed the same bad data. So I audited all 40 calculators line by line against primary sources: NIST's alcoholometer tables, published vapor-liquid equilibrium data, the ICUMSA sugar polynomials, manufacturer yeast specs. Four formulas needed fixing, and the whole audit is documented publicly on the methodology page.
The suite covers the full workflow: planning a wash, pitching and feeding yeast, tracking fermentation, planning a distillation run with cuts, diluting to bottling strength, and simulating pot and column stills. Free, no signup, works offline.
Happy to answer anything about the chemistry, the audit, or the weirder corners of fermentation math.
About DistilCalc on Product Hunt
“40 free distilling calculators, audited against NIST”
DistilCalc was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #55 on the daily leaderboard. DistilCalc is a free suite of 40 calculators and 41 guides for home distillers, mead makers, and fermenters. Dilution, cuts planning, temperature correction, yeast pitch rates, nutrient dosing, priming, mash steps, and three still simulators built on real vapor-liquid equilibrium data. No signup, no paywall, works offline. In August 2026 every formula was audited against primary sources (NIST Circular 19, OIML R 22, ICUMSA, the TOSNA protocol) and the audit is public on the methodology page.
On the analytics side, DistilCalc competes within Web App, Productivity and Drinking — topics that collectively have 788.1k followers on Product Hunt. The dashboard above tracks how DistilCalc performed against the three products that launched closest to it on the same day.
Who hunted DistilCalc?
DistilCalc was hunted by Cameron Liefsoens. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of DistilCalc including community comment highlights and product details, visit the product overview.
Cameron Liefsoens