Standard drink calculator
Enter any drink's size and strength to see how many US standard drinks it is.
How it works
The formula is simple: standard drinks = volume (oz) × ABV% ÷ 0.6. One US standard drink is 0.6 fl oz (about 14 grams) of pure alcohol — so a 12 oz beer at 5% comes out to exactly 1.0. A strong 16 oz IPA at 7% is about 1.9 — nearly two. See what counts as a standard drink for the full picture, or look up specific drinks and bottles.
Frequently asked questions
How do you calculate standard drinks?
Multiply the volume (in ounces) by the ABV percentage, then divide by 0.6 — the fluid ounces of pure alcohol in one US standard drink. For example, 12 oz at 5% is 12 × 5 ÷ 100 ÷ 0.6 = 1.0.
What is one standard drink?
A US standard drink contains 0.6 fl oz (about 14 grams) of pure alcohol — roughly a 12 oz beer at 5%, a 5 oz glass of wine at 12%, or a 1.5 oz shot of 80-proof spirits.
How do I use this calculator?
Enter the size of your drink and its alcohol by volume (ABV) percentage. The calculator instantly shows how many standard drinks that is. Switch the unit between ounces and milliliters as needed.