Calculators
Every calculator states its method and its limits. Where a formula is an approximation, it says so.
Dilution
How much water to add to bring a spirit down to the strength you want.
Blending
The strength you get when two spirits are combined.
Temperature correction
Alcoholmeters are calibrated at 20 °C. Correct a reading taken at any other temperature.
Absolute alcohol
The litres of pure ethanol in a quantity of spirit — the unit records and duties are counted in.
Mash yield
Roughly how much spirit a fruit mash will give, from its sugar content.