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Questions, awkwardly answered.

Health · Unit check

Alcohol Unit Reality Check

Count your alcohol units from last night, compare them to the UK weekly guideline, and get a rough clearance time estimate.

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Unit check

Enter your drinks by type — pints, wine, spirits, shots — plus your weight and sex to get total units, a guideline comparison, and a clearance estimate.

What this means

This tool converts your drinks into alcohol units using standard UK definitions, compares the total to the 14-unit weekly guideline, and estimates clearance time at 1 unit per hour.

Formula used

Units: pint of 4.5% beer = 2.3 units, 175ml glass of 13% wine = 2.3 units, 25ml spirit = 1 unit. Clearance: 1 unit per hour average.

Worked example

3 pints, 1 glass of wine, and 2 spirits: 6.9 + 2.3 + 2 = 11.2 units — 80% of the weekly guideline in one session.

Common questions

What is the UK weekly alcohol guideline?
The UK Chief Medical Officers advise that both men and women should not regularly drink more than 14 units per week, spread across 3 or more days, with alcohol-free days each week.

Is the clearance time accurate enough to drive by?
No. The 1 unit per hour average is a very rough guide. Do not use it to decide whether you are safe to drive. The only safe approach is to not drive after drinking.

Plain-English summary

Enter your drinks to find out how many units you consumed and how that compares to the UK guidelines.

This section translates the result into a short, direct takeaway rather than leaving the page at a bare number.

Disclaimer: This is a general estimate, not medical or health advice. Alcohol tolerance, health conditions, food intake, and other factors affect individual response. The clearance estimate is a rough average. Do not drive or operate machinery based on a clearance estimate.

Read the guide

How to count alcohol units and what the weekly guideline actually means

A plain guide to UK alcohol unit definitions, the 14-unit weekly guideline, and why the clearance estimate is a rough guide, not a driving test.

Read the guide

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