Homebrewing Tools

Free homebrewing calculators that run entirely in your browser — ABV, IBU bitterness, beer colour (SRM/EBC), strike-water temperature, priming sugar, yeast pitch rate, hydrometer temperature correction, Brix↔SG, keg carbonation, refractometer final gravity, mash efficiency and brewing-water chemistry. Brew better beer, nothing uploaded.

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ABV Calculator (OG / FG)

Find your beer or wine's alcohol by volume from original and final gravity, plus ABW, apparent and real attenuation, and calories per serving.

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IBU Calculator (Tinseth / Rager)

Estimate the bitterness of your beer in IBU from each hop addition using the Tinseth or Rager model, with pellet and whole-hop utilization.

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Beer Color Calculator (SRM / EBC, Morey)

Predict your beer's finished color in SRM, EBC, and Lovibond from the grain bill using the Morey equation, with a live color swatch.

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Mash Strike Water Calculator

Find the strike water temperature and volume to hit your target mash rest, plus optional boiling-water infusion for a step mash.

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Priming Sugar Calculator

Find how much priming sugar to add at bottling to reach a target CO2 level, accounting for residual CO2 from your beer's temperature and sugar type.

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Yeast Pitch Rate & Starter Calculator

Find how many yeast cells and how big a starter you need for a healthy pitch, from batch volume, gravity, style, and yeast pack age.

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Hydrometer Temperature Correction

Correct a hydrometer specific-gravity reading for the difference between the sample temperature and the instrument's calibration temperature.

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Brix / Plato / SG Converter

Convert between degrees Brix, degrees Plato, and specific gravity for wort and must, with gravity points and potential ABV shown at a glance.

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Keg Force Carbonation PSI Calculator

Find the CO2 regulator pressure to force-carbonate a keg to a target CO2 volume at your serving temperature, with style presets and a reverse PSI lookup.

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Refractometer Final Gravity Correction

Correct a refractometer reading taken during or after fermentation, where alcohol skews the Brix scale, into a true final gravity, OG, and ABV.

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Mash Efficiency & Expected OG Calculator

Predict original gravity from a grain bill at a chosen efficiency, or back-solve the efficiency you achieved from a measured OG, in US or metric units.

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Brewing Water Salt Addition Calculator

See how brewing salts (gypsum, calcium chloride, epsom salt, baking soda) shift your source water's ion profile toward a target, with the sulfate-to-chloride ratio.

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