# Standard Drink Calculator

Calculate how many standard drinks are in your beverage. Enter the volume and ABV to find out. One US standard drink equals 14 grams of pure alcohol.

## What this calculates

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).

## Inputs

- **Beverage Volume** (oz) — min 0.1, max 1000 — Volume of the drink (a standard beer is 12 oz / 355 mL)
- **Alcohol by Volume (ABV)** (%) — min 0.1, max 100 — ABV percentage listed on the label
- **Number of Drinks** — min 1, max 100 — How many of this drink are you having?

## Outputs

- **Standard Drinks** — Number of US standard drinks (14g pure alcohol each)
- **Pure Alcohol** (g) — Grams of pure ethanol
- **Pure Alcohol** (fl oz) — Fluid ounces of pure ethanol
- **Estimated Alcohol Calories** (kcal) — Calories from alcohol alone (7 kcal per gram), not including sugars or mixers

## Details

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.

## Frequently Asked Questions

**Q: What counts as one standard drink in the US?**

A: In the United States, one standard drink contains 14 grams of pure ethanol. This is approximately 12 fl oz of 5% beer, 5 fl oz of 12% wine, or 1.5 fl oz of 40% (80-proof) distilled spirits. These are approximations -- the exact number of standard drinks depends on the specific volume and ABV of your beverage.

**Q: Why do other countries define a standard drink differently?**

A: Different countries chose different reference amounts based on their public health guidelines. The UK standard unit is 8 grams, Australia uses 10 grams, Canada uses 13.45 grams, and the US uses 14 grams. Japan uses 19.75 grams. These differences reflect varying traditions and guidelines around low-risk drinking levels rather than any scientific consensus on a "correct" amount.

**Q: How many standard drinks is considered moderate drinking?**

A: The Dietary Guidelines for Americans define moderate drinking as up to 1 standard drink per day for women and up to 2 per day for men. The NIAAA defines "low-risk" drinking as no more than 3 drinks on any single day and no more than 7 per week for women, or no more than 4 per day and 14 per week for men. These guidelines refer specifically to US standard drinks of 14 grams each.

**Q: Why is knowing the number of standard drinks important?**

A: Drink sizes and ABV vary widely. A "drink" at a bar or restaurant may contain 1 to 3+ standard drinks. Craft beers often have 7-12% ABV, making a pint closer to 2 standard drinks. Cocktails with multiple spirits can contain 2-4 standard drinks. Tracking standard drinks rather than counting glasses gives a much more accurate picture of actual alcohol consumption.

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Source: https://vastcalc.com/calculators/health/standard-drink
Category: Health & Fitness
Last updated: 2026-04-08