Specialty calculators

Home brewing and fermentation

The sums a brew day runs on, from the first gravity reading to the last bottle.

ABV from gravity readings

Alcohol, attenuation and calories from an original and a final gravity.

Hydrometer temperature correction

The gravity a reading would have shown at the calibration temperature.

IBU from a hop schedule

Tinseth bitterness for a whole hop schedule, addition by addition.

Priming sugar

Priming sugar for a target carbonation, allowing for residual CO2.

Mash and sparge water

Mash, sparge, pre-boil and post-boil volumes from the batch size.

Yeast pitch rate

Cells, packs, dry yeast or slurry for a batch at a given pitch rate.

Dilution and blending

Gravity and ABV of a blend, and water to reach a target gravity.

These are planning figures, not a substitute for a standard, a specification or a professional. Check anything that matters against the source your trade actually works to.