# Alcohol Unit Calculator

URL: https://speedycalculator.com/calculators/health/alcohol-units/
Last updated: 2026-10-25

> The alcohol unit calculator converts a drink’s volume and strength into UK units (8 g alcohol) and U.S. standard drinks (14 g alcohol). It also shows the grams of pure alcohol.

## Inputs

- Drink volume (mL, fl oz (US), pint (UK), L)
- Alcohol by volume (%)
- Number of drinks

## Results

- Pure alcohol
- UK units
- US standard drinks

## Formula

```
Alcohol (g) = volume (mL) × ABV% ÷ 100 × 0.789
UK units = volume × ABV ÷ 1000
US standard drinks = grams ÷ 14
```

## Explanation

Drink sizes and strengths vary widely, so counting units or standard drinks is the best way to track intake. UK guidance advises not regularly drinking more than 14 units a week.

### How to use the Alcohol Unit Calculator

- **Drink volume**
- **Alcohol by volume**
- **Number of drinks**

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Multiply the volume by the alcohol percentage to get millilitres of alcohol, then convert to grams with ethanol’s density.

### Inputs explained

FieldWhat to enterDrink volumeUnits: mL, fl oz (US), pint (UK), LAlcohol by volumeIn %Number of drinksA number

### What each result means

- **Pure alcohol** = [Drink volume] × [Alcohol by volume]÷100 × 0.789 × [Number of drinks]
- **UK units** = [Drink volume] × [Alcohol by volume] ÷ 1000 × [Number of drinks]
- **US standard drinks** = [Pure alcohol] ÷ 14

### Example values

How the main result changes when **Drink volume** changes and everything else stays at the example values above:

Drink volume (mL)UK units2501.33751.95002.56253.17503.81,0005
*Health note: this calculator is for education and screening only and is not a diagnosis or treatment advice. Discuss your results with a qualified clinician.*

## Worked example

Inputs — Drink volume: 500 mL; Alcohol by volume: 5 %; Number of drinks: 1.

Results — Pure alcohol = 19.7 g; **UK units = 2.5**; US standard drinks = 1.4.

## Key terms

- **ABV**: Alcohol by volume, as a percentage.

## FAQ

**How many units is a bottle of wine?**
A 750 mL bottle of 13% wine is about 9.8 units.

**Is there a safe level?**
Health agencies say no level is risk-free; less is better.

**What formula does the Alcohol Unit Calculator use?**
Alcohol (g) = volume (mL) × ABV% ÷ 100 × 0.789.


## Sources

- [NHS – Alcohol units](https://www.nhs.uk/live-well/alcohol-advice/calculating-alcohol-units/)