Brewing tools
Free brewing calculators for ABV, gravity correction, carbonation, strike water, IBU, yeast pitch rate and more. Share any calculation with a link.
Calculate ABV, attenuation, calories and carbs from OG and FG.
Correct your hydrometer gravity reading for sample temperature in SG, Plato or Brix.
Convert refractometer Brix readings to gravity and estimate FG and ABV in fermenting beer, including correction factor.
Fix a missed gravity reading: add DME, LME or sugar, dilute with water, or extend the boil.
Find the strike water temperature to hit your mash target, with grain temp, tun heat capacity and °C/°F units.
Work out how much boiling water to add to hit your next mash rest temperature.
Measure your mash tun heat capacity as an equivalent water volume in liters, with the same formula as the Brewfather app for strike and rest temps.
Work out bottle priming sugar, keg priming, or forced-carbonation PSI from CO2 volumes and temperature.
Estimate beer bitterness from hop additions with Tinseth, Rager, Garetz or Noonan, including hop stands.
Estimate alpha acid lost during hop storage from age, temperature and packaging — same formula as the Brewfather app.
Work out how much yeast to pitch and the starter size to grow it.
Convert specific gravity, gravity points, degrees Plato and Brix instantly.
Convert beer color between SRM, EBC and degrees Lovibond with a live glass swatch.
Convert liters, gallons, ml, fluid ounces, pints and barrels with live updates as you type.
Convert kilograms, grams, pounds, ounces and stones with live updates as you type.
Convert temperatures between Celsius, Fahrenheit and Kelvin instantly.
Convert pressure between psi, bar, kilopascals and atmospheres instantly.
In the Brewfather app the same math runs live in your recipes and batches — water chemistry, mash pH, yeast starters and all. Available free in the Brewfather app.