Brew-day math
Calculators
Quick gravity and volume math — no spreadsheet required.
ABV
from OG / FGEnter your original and final gravity readings to estimate alcohol by volume.
Estimated ABV
5.25%
Sparge / Dilution
water additionHit your target OG every time.
Use pre-boil for sparge adjustments, or just before knockout for absolute precision.
Water to Add
4.00L
Total Volume
24.00L
60.0 pts × 20 L = 50.0 pts × 24.00 L
Boil-Off
volume concentrationPre-boil gravity came in low? Work out how much to boil down to concentrate and land on your target OG.
Post-Boil Volume
5.44gal
Boil Off
1.56gal
Est. Boil Time
75min
42.0 pts × 7 gal = 54.0 pts × 5.44 gal
Carbonation
forced CO₂Set your target CO₂ volumes and serving temperature to find the regulator pressure for force-carbonating kegs.
Regulator Pressure
10.8psi
Pressure (metric)
0.74bar
2.4 vols @ 4.0°C / 39.2°F
Hydrometer Correction
temperature adjustCorrect your hydrometer reading for the sample temperature. Warm wort reads lower than the true gravity — this fixes that.
Corrected SG
1.053
Correction
+0.003
1.050 @ 30.0°C → calibrated 20°C