Brewing Calculators
Professional tools for homebrewers and craft producers — calculate, convert, and calibrate with confidence.
Brewing Equipment
▼Brewhouse Efficiency
Calculate your overall brewhouse efficiency from measured wort and fermentable data.
Hydrometer Adjustment
Correct your hydrometer reading for sample temperature versus the instrument's calibration temperature.
Mash Efficiency
Calculate the efficiency of your mash based on pre-boil gravity and volume.
Mash Tun Calibration
Determine your mash tun's heat capacity to better predict temperature losses during mashing.
Refractometer Calculator
Correct refractometer readings for alcohol interference during fermentation using a wort correction factor.
Ingredients
▼Hop Age Calculator
Estimate the current alpha acid % of hops based on storage type and time since harvest.
Conversions
▼Colour Converter
Convert between beer colour scales — Lovibond, EBC, and SRM. Enter any one value to get the others.
Gravity Converter
Convert between specific gravity (SG), Plato (°P), and Brix. Enter any one value to get the others.
Mash
▼Decoction Volume Calculator
Calculate the volume of mash to pull for a decoction step to hit your target rest temperature.
Gravity Adjustment Calculator
Find how long to boil to concentrate gravity, or how much malt extract to add to raise gravity.
Grist Ratio
Calculate your mash thickness — the ratio of water to grain used in the mash.
Mash & Sparge Water Calculator
Calculate mash water, sparge water, and total water needed for your brew session.
Mash pH Adjustment
Calculate the volume of acid needed to hit your target mash pH based on water alkalinity.
Rest & Infusion Temperature
Calculate the volume of boiling water to infuse to raise your mash to the next rest temperature.
Strike Water Temperature
Calculate the temperature your strike water needs to be to hit your target mash temperature.
Fermentation
▼ABV Calculator
Calculate the alcohol by volume (ABV%) of your beer from original and final gravity.
Apparent / Real Attenuation
Calculate apparent and real attenuation to understand how much fermentable sugar your yeast consumed.
Calories in ABV
Estimate the caloric content of your finished beer per serving.
Pitch Rate Calculator
Calculate how many yeast packs or grams of dry yeast you need for proper cell count at pitching.
Bottle Carbonation Calculator
Calculate priming sugar needed to carbonate your beer in the bottle to a target CO₂ volume.
Bottling & Kegging
▼Forced Carbonation Calculator
Find the regulator pressure needed to force carbonate a keg to your desired CO₂ volume at serving temperature.
Spirits
▼Spirit Dilution Calculator
Calculate how much water to add to dilute a spirit to your desired final ABV, or work backwards from a target volume.