Four calculators for everyday drink questions. Each one runs in your browser — nothing is sent anywhere, and no figure here is a claim about any particular brand.
Standard drinks
Standard drinks calculator
How many US standard drinks are in what you poured.
One US standard drink = 0.6 US fl oz (14 g) of pure alcohol, per the NIAAA definition. Guidance differs by country.
Volume converter
Drink volume converter
Convert between the units used on bottles, jiggers and recipes.
US customary units. A US fluid ounce is 29.5735 ml; UK measures differ.
Dilution
Dilution calculator
How much water to add to bring a spirit down to a target strength.
Formula: volume × (current ÷ target − 1). Ignores the slight volume contraction when water and ethanol mix.
ABV from gravity readings
Alcohol by volume calculator
Work out ABV from original and final gravity readings.
Formula: (OG − FG) × 131.25. This is the standard homebrew estimate; it is an approximation, not a lab measurement.
These tools are arithmetic only. Drinking guidance differs by country; the standard-drink figure follows the US NIAAA definition of 14 g of pure alcohol.