Work out standard drinks instantly with clear inputs, formula shown and shareable results.
Pure alcohol volume is drink volume times ABV; multiplying by ethanol's density of 0.789 g per ml gives grams, which are then divided by the local standard drink size. A standard drink is 8 g in the UK but 14 g in the US, so the same pint counts as nearly twice as many drinks depending on whose guidance you follow.
Alcohol grams
grams = volume ml x ABV x 0.789
Standard drinks
drinks = alcohol grams / grams per standard drink
grams = volume ml x ABV x 0.789. Pure alcohol volume is drink volume times ABV; multiplying by ethanol's density of 0.789 g per ml gives grams, which are then divided by the local standard drink size.
A standard drink is 8 g in the UK but 14 g in the US, so the same pint counts as nearly twice as many drinks depending on whose guidance you follow.
Enter drink volume, strength, standard drink definition. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.