Standard Drink Calculator
Find out exactly how many standard drinks are in any alcoholic beverage. Enter the volume and ABV percentage from the label, and this calculator converts it to US standard drinks (14 grams of pure alcohol each).
A US standard drink contains 14 grams (0.6 fluid ounces) of pure ethanol. That is roughly the amount of alcohol in a 12 oz beer at 5% ABV, a 5 oz glass of wine at 12% ABV, or a 1.5 oz shot of 80-proof (40% ABV) spirits. But many drinks deviate from these "standard" sizes.
A craft IPA at 7.5% ABV in a 16 oz pint is actually about 1.8 standard drinks. A generous 8 oz pour of 14% wine is about 1.9 standard drinks. Knowing how many standard drinks you are consuming helps you track your intake and stay within recommended guidelines.
Common examples:
- 12 oz regular beer (5% ABV) = 1.0 standard drinks
- 16 oz craft IPA (7% ABV) = 1.6 standard drinks
- 5 oz wine (12% ABV) = 0.9 standard drinks
- 1.5 oz shot (40% ABV) = 1.0 standard drinks
- 25 oz bottle of wine (13.5% ABV) = 5.0 standard drinks
The formula is: standard drinks = (volume in oz x ABV/100 x 29.5735 x 0.789) / 14. The 29.5735 converts fluid ounces to mL, 0.789 is the density of ethanol (g/mL), and 14 is the grams of alcohol per US standard drink.
Note: standard drink definitions vary by country. The UK uses 8 grams, Australia uses 10 grams, and Japan uses 19.75 grams. This calculator uses the US definition of 14 grams.
This tool is for educational purposes only and should not replace professional medical advice.