Alcohol Units Per Week Calculator

Enter your typical beer, wine, and spirits intake per session and how many days a week you drink to calculate your weekly units, risk level, and calorie impact.

Created by Luis GonzalezLast updated: May 9, 2026

How to Use This Calculator

1
Enter Beer Pints per Session
Input the number of pints of beer (approx. 568 ml, 4% ABV) you consume in a typical drinking session.
2
Specify Wine Glasses per Session
Provide the number of standard wine glasses (approx. 175 ml, 12% ABV) you drink per session.
3
Input Spirit Shots per Session
Enter the number of single spirit shots (approx. 25 ml, 40% ABV) you consume per drinking session.
4
State Drinking Days Per Week
Indicate how many days per week you typically drink alcohol, from 1 to 7.
5
Review Weekly Alcohol Units and Risk
Examine your total weekly alcohol unit consumption, compare it to guidelines, and see your associated risk level, calorie impact, and alcohol-free days.

Example Calculation

An individual wants to calculate their weekly alcohol unit consumption, typically drinking 2 pints of beer, 1 glass of wine, and 1 shot of spirits on 3 days a week.

Beer (Pints per session)

Wine (Glasses per session)

Spirits (Shots per session)

Drinking Days Per Week (days)

Results

23.1 units

Tips

Aim for At Least 3 Alcohol-Free Days

To support liver recovery and reduce dependency, aim for at least three alcohol-free days per week. This strategy can significantly lower your overall weekly unit intake and promote better sleep and energy levels.

Track Units, Not Just Drinks

Alcohol content varies greatly by beverage. Focus on tracking units (1 unit = 10ml pure alcohol) rather than just the number of drinks. A large glass of wine (250ml, 13% ABV) can contain 3.3 units, far more than a standard 1.5-unit pint of beer.

Set a Weekly Unit Cap

Consciously set a maximum weekly unit cap for yourself, ideally within the low-risk guideline of 14 units. Plan your consumption around this limit to avoid exceeding it, helping to maintain healthier drinking habits.

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 in 2025.

Global Guidelines for Low-Risk Alcohol Consumption in 2025

In 2025, 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

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.

💡 To understand how alcohol impacts your body's hydration, our Dehydration Risk Calculator can offer further insights.

Calculating Weekly Alcohol Units

Let's calculate the weekly alcohol units 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.

Calculate beer units per session: 2 pints × 2.3 units/pint = 4.6 units.
Calculate wine units per session: 1 glass × 2.1 units/glass = 2.1 units.
Calculate spirit units per session: 1 shot × 1.0 units/shot = 1.0 unit.
Total units per session: 4.6 + 2.1 + 1.0 = 7.7 units.
Calculate weekly units: 7.7 units/session × 3 days/week = 23.1 units.

This individual consumes 23.1 units of alcohol per week, which is above the UK's low-risk guideline of 14 units.

💡 For assessing other health risks, our DVT Risk Score (Wells Criteria) Calculator can help evaluate specific medical conditions.

Global Guidelines for Low-Risk Alcohol Consumption in 2025

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.

Frequently Asked Questions

What is an alcohol unit, and how is it calculated?

An alcohol unit is a measure of pure alcohol, defined as 10 milliliters or 8 grams of pure ethanol. It is calculated by multiplying the volume of the drink (in ml) by its Alcohol by Volume (ABV) percentage, then dividing by 10. For example, a 500 ml pint of 4% ABV beer contains (500 × 0.04) / 10 = 2 units. This standardized measure helps individuals track their alcohol intake.

What are the UK's low-risk drinking guidelines?

The UK's Chief Medical Officers' low-risk drinking guidelines recommend that both men and women should not regularly drink more than 14 units of alcohol per week. It is also advised to spread these units across three or more days, avoid binge drinking, and include several alcohol-free days each week. Adhering to these guidelines helps minimize health risks associated with alcohol consumption.

How many calories are in 14 units of alcohol?

The number of calories in 14 units of alcohol can vary depending on the type of beverage, but a general estimate is around 500-700 calories. Since 1 unit equals 10ml of pure alcohol, and pure alcohol contains 7 calories per gram, 14 units (140ml pure alcohol) would be approximately 110 grams of alcohol. This translates to about 770 calories from the alcohol itself, plus additional calories from sugars and carbohydrates in the drinks.

Why is it important to have alcohol-free days?

It is important to have alcohol-free days to allow your body, particularly your liver, time to recover and regenerate. Regular alcohol-free periods can help reduce the risk of developing alcohol dependence, improve sleep quality, aid in weight management by reducing empty calories, and contribute to better overall mental and physical health. The UK guidelines suggest at least 2-3 alcohol-free days per week.