Home›Calculators›Health›Standard Drink Calculator

Standard Drink Calculator

Health

Calculate how many US standard drinks (14g pure alcohol each) are in any beverage from its volume and ABV percentage. For tracking alcohol intake.

Reviewed by the thecalcu.com team · Last updated July 3, 2026

252,000
0.560

US Standard Drinks

1
Pure Alcohol Content
14

This calculator computes your US Standard Drinks, Pure Alcohol Content from the values you enter.

Inputs
Drink VolumeAlcohol by Volume (ABV)
Outputs
US Standard DrinksPure Alcohol Content

What is a Standard Drinks?

The Standard Drink Calculator computes how many US standard drinks (defined as roughly 14 grams of pure alcohol each) are contained in any beverage, based on its volume and ABV percentage. Enter any drink's size and strength for an instant standard drink count.

For a related UK-style reference, see the Alcohol Unit Calculator.

Why Use a Standard Drink Calculator?

Health guidelines and drinking recommendations in the US are commonly expressed in standard drinks, but few beverages are labeled that way directly. This calculator converts any drink's volume and ABV into that standardized reference measure instantly.

Who Should Use This Calculator?

  • Anyone tracking their own alcohol intake using the US standard drink system.
  • Bartenders and hospitality workers calculating standard drink counts for specific beverages.
  • Students of public health learning how the standard drink formula works.
  • Health-conscious drinkers comparing different drink choices by standard drink content.

What Insights Does the Standard Drink Calculator Give You?

The US Standard Drinks figure is the headline result, giving the standardized measure for the entered drink. The Pure Alcohol Content shows the actual grams of ethanol contained in the drink, the direct quantity standard drinks are derived from.

How to use this Standard Drinks calculator

  1. Enter the drink's volume in millilitres.
  2. Enter the drink's ABV (alcohol by volume) percentage, found on the label.
  3. Read the US Standard Drinks and Pure Alcohol Content results instantly.
  4. Repeat for each drink to build up a running total for the day or week.
Show formula & methodology ↓Show less ↑

Formula & Methodology

Pure Alcohol (g) = Volume (mL) × (ABV% ÷ 100) × 0.789 g/mL

Standard Drinks = Pure Alcohol (g) ÷ 14

Worked example, a 355 mL beer at 5% ABV:

Pure Alcohol = 355 × 0.05 × 0.789 = 14.0 g

Standard Drinks = 14.0 ÷ 14 = 1.0 standard drink

Frequently Asked Questions

What is a US standard drink?
In the United States, a standard drink is commonly defined as containing about 14 grams of pure alcohol, roughly equivalent to a 12 oz beer at 5% ABV, a 5 oz glass of wine at 12% ABV, or a 1.5 oz shot of spirits at 40% ABV.
How is the number of standard drinks calculated?
The calculator first finds the pure alcohol content in grams by multiplying the drink's volume by its ABV percentage and the density of ethanol (0.789 g/mL), then divides that figure by 14 grams to get the standard drink count.
Why does the calculation use ethanol density?
ABV describes alcohol content by volume, but the standard drink definition is based on grams of alcohol (mass), so converting volume to mass requires multiplying by ethanol's density (0.789 grams per millilitre).
Is a US standard drink the same as a UK alcohol unit?
A UK unit represents 10 mL (about 8 grams) of pure alcohol, while a US standard drink represents about 14 grams, meaning the same beverage produces a different count depending on which system is used. See the [Alcohol Unit Calculator](/alcohol-unit-calculator/) for the UK units version.
How many standard drinks are in a typical bottle of wine?
A standard 750 mL bottle of wine at 12% ABV works out to roughly 5 standard US drinks, based on the same formula this calculator uses.
Do drinking guidelines reference standard drinks?
Many health guidelines express recommended limits in terms of standard drinks per day or week, which is part of why converting any specific beverage into standard drink units is a useful reference calculation.
Does this calculator account for different drink strengths within a category?
Yes, because the calculation uses your entered ABV directly, it automatically adjusts for stronger or weaker versions of any drink type, rather than assuming a single fixed ABV for each beverage category.
How does this relate to the AUDIT-C Calculator?
The [AUDIT-C Calculator](/audit-c-calculator/) screens broader drinking patterns and frequency, while this calculator computes the precise standard drink count for a specific beverage, the two tools complement each other for understanding alcohol consumption.
What unit does pure alcohol content use in this calculator?
Pure alcohol content is expressed in grams, matching the standard drink definition's basis, which is a mass-based rather than volume-based measure.
Is this calculator giving medical advice about drinking?
No, this is a general reference calculation tool based on standard formulas. It does not provide personalized health guidance about alcohol consumption, which should come from a healthcare professional if you have concerns.
Also known as
US standard drink calculator14 grams alcohol calculatorhow many standard drinks calculatoralcohol grams calculator