Alcohol Units Per Week Calculator

Tracking Your Weekly Alcohol Unit Consumption for Healthier Habits

Understanding your weekly alcohol intake in terms of units is a key step towards responsible drinking and maintaining good health.

This Alcohol Units Per Week Calculator helps you quantify your consumption, compare it against established guidelines, and assess your risk level.

For an individual who typically consumes 2 pints of beer, 1 glass of wine, and 1 shot of spirits on three separate days, the weekly total would be 23.1 units, exceeding the UK's 14-unit guideline.

This intake also contributes approximately 1740 kcal per week.

Global Guidelines for Low-Risk Alcohol Consumption in 2026

In 2026, global guidelines for low-risk alcohol consumption vary, yet share common principles aimed at minimizing health harms.

The UK's Chief Medical Officers recommend not exceeding 14 units per week for both men and women, spread over three or more days, with several alcohol-free days.

In contrast, the US Centers for Disease Control and Prevention (CDC) advises up to 2 drinks/day for men and 1 drink/day for women, with a focus on moderation.

The World Health Organization (WHO) emphasizes that no level of alcohol consumption is entirely safe, but generally supports limiting intake to reduce risks.

All guidelines uniformly stress the importance of alcohol-free days, typically 2-3 per week, to allow the body to recover and reduce the risk of dependence.

The UK Unit System for Alcohol Calculation

The Alcohol Units Per Week Calculator aggregates your per-session consumption across different drink types and then multiplies it by your drinking frequency to provide a weekly total.

It uses the UK unit system, where one unit equals 10ml (or 8 grams) of pure alcohol.

beer units = beer pints × 2.3 (approx. units per pint of 4% ABV beer)
wine units = wine glasses × 2.1 (approx. units per 175ml glass of 12% ABV wine)
spirit units = spirit shots × 1.0 (approx. units per 25ml shot of 40% ABV spirits)
units per session = beer units + wine units + spirit units
weekly units = units per session × drinking days per week
yearly units = weekly units × 52

calories per session = (beer pints × 180 kcal/pint) + (wine glasses × 160 kcal/glass) + (spirit shots × 60 kcal/shot)
weekly calories = calories per session × drinking days per week
yearly calories = weekly calories × 52

risk level:
  - None: 0 weekly units
  - Low Risk: ≤ 14 weekly units
  - Increasing Risk: > 14 and ≤ 35 weekly units
  - High Risk: > 35 weekly units

units over/under guideline = weekly units - 14
alcohol-free days = 7 - drinking days per week

Here, beer pints, wine glasses, and spirit shots represent your consumption for each session, and drinking days per week is how often you consume alcohol.

Calculating Weekly Alcohol Units and Other Metrics

Let's calculate the weekly alcohol units and other metrics for an individual who drinks 2 pints of beer, 1 glass of wine, and 1 shot of spirits per session, on 3 days per week.

1. Calculate beer units per session: 2 pints × 2.3 units/pint = 4.6 units.
2. Calculate wine units per session: 1 glass × 2.1 units/glass = 2.1 units.
3. Calculate spirit units per session: 1 shot × 1.0 units/shot = 1.0 unit.
4. Total units per session: 4.6 + 2.1 + 1.0 = 7.7 units.
5. Calculate weekly units: 7.7 units/session × 3 days/week = 23.1 units.
6. Calculate yearly units: 23.1 units/week × 52 weeks/year = 1201.2 units.
7. Calculate calories per session: (2 pints × 180 kcal/pint) + (1 glass × 160 kcal/glass) + (1 shot × 60 kcal/shot) = 360 + 160 + 60 = 580 kcal.
8. Calculate weekly calories: 580 kcal/session × 3 days/week = 1740 kcal.
9. Calculate yearly calories: 1740 kcal/week × 52 weeks/year = 90480 kcal.
10. Determine risk level: 23.1 units is greater than 14 units but less than or equal to 35 units, so the risk level is "Increasing Risk".
11. Calculate units over/under guideline: 23.1 - 14 = 9.1 units over.
12. Calculate alcohol-free days: 7 - 3 = 4 days/week.

This individual consumes 23.1 units of alcohol per week, which is above the UK's low-risk guideline of 14 units, placing them in the "Increasing Risk" category.

They also consume 1740 kcal from alcohol weekly and have 4 alcohol-free days.

The UK's 14-Unit Weekly Alcohol Guideline Explained

The UK's Chief Medical Officers' guideline of 14 units per week, introduced in 2016, represents the maximum amount of alcohol adults should consume regularly to minimize health risks.

This guideline applies equally to men and women, reflecting a shift from previous gender-specific recommendations based on updated scientific evidence regarding cancer and other long-term health conditions.

A "unit" is precisely defined as 10ml or 8g of pure alcohol.

The recommendation also emphasizes spreading consumption over three or more days and incorporating several alcohol-free days each week to prevent dependence and allow the body to recover.

This framework aims to empower individuals to make informed choices about their drinking habits for better public health outcomes.