Alcohol Units & Standard Drinks
Understand how much alcohol you consume across different drink types and countries. Compare to UK, US, and Australian guidelines.
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UK limit: 14 units/week Spread over 3+ days Binge = 6+ units in one session
Ready to run the numbers?
Why: Tracking alcohol consumption helps you stay within guidelines and understand hidden calories.
How: UK unit = (volume ml × ABV%) ÷ 1000. US standard drink = 14g pure alcohol. Different countries use different standards.
Run the calculator when you are ready.
Weekend Social Drinker
Enjoys 2 glasses of wine with dinner on Friday and Saturday evenings
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Daily Beer Consumer
Has 2 pints of craft beer every evening after work
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Moderate Spirits Drinker
Enjoys whisky - one double measure 3 times a week
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Heavy Drinking Pattern
Weekend binge drinking - 6+ drinks on Friday and Saturday
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Light Occasional Drinker
One small glass of wine with Sunday roast, within guidelines
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Drink Information
Primary Drink
Drinking Pattern
Personal Information
Additional Drink (Optional)
Health Context
Results
| Measure | Value | Notes |
|---|---|---|
| UK Units (per session) | 2.56 | 10ml pure alcohol each |
| US Standard Drinks | 1.44 | 14g pure alcohol each |
| AU Standard Drinks | 2.02 | 10g pure alcohol each |
| Weekly Units | 5.1 | Limit: 14 units |
| Monthly Units (est.) | 22 | - |
| Yearly Units (est.) | 266 | - |
| Weekly Calories | 771 kcal | From alcohol only |
| Risk Level | Low | Minimal health impact within guidelines |
Visualizations
Weekly Allowance
International Comparison
Calorie Impact
Risk Level
Recommendations
- •You are within recommended guidelines
- •Continue maintaining moderate consumption
- •Have at least 2-3 alcohol-free days per week
- •Track your drinks using an app or diary
Calculation Steps
For informational purposes only — not medical advice. Consult a healthcare professional before acting on results.
🏥 Health Facts
Pint of 4% beer ≈ 2.3 UK units
— UK CMO
14 units = 6 pints or 6 glasses wine
— Weekly limit
What is an Alcohol Unit?
An alcohol unit is a standardized measure of pure alcohol content that allows you to track consumption regardless of drink type. Different countries use different standards, which can make it confusing to understand guidelines. This calculator converts between all major international standards and helps you understand exactly how much you're drinking.
UK Unit
10ml pure alcohol. A pint of 4% beer = ~2.3 units. Weekly limit: 14 units.
US Standard Drink
A 12oz 5% beer = 1 drink. Men: ≤2/day, Women: ≤1/day (NIAAA).
AU Standard Drink
Similar to UK. Max 10 standard drinks/week and no more than 4/day.
Quick Reference: Common Drinks in UK Units
How to Calculate Alcohol Units
The Universal Formula
Units = (Volume in ml × ABV%) ÷ 1000
Measure volume in millilitres (ml)
Find ABV (Alcohol By Volume) - usually on the label
Multiply volume × ABV, then divide by 1000
🍺 Pint of Beer (4%)
568ml × 4% ABV
🍷 Large Wine (250ml, 13%)
250ml × 13% ABV
🥃 Double Whisky (50ml, 40%)
50ml × 40% ABV
When to Use This Calculator
Tracking Weekly Intake
Monitor your consumption against the 14-unit weekly guideline with precision.
Weight Management
Calculate hidden calories from alcohol - often 500-1000+ calories per week.
Setting Reduction Goals
Establish baselines and targets if you're trying to cut down.
Medical Appointments
Provide accurate consumption data when doctors ask about drinking habits.
International Travel
Convert between UK units and US/AU standards when abroad.
Pregnancy Planning
Understand current consumption before planning for zero alcohol during pregnancy.
International Drinking Guidelines
| Country | Standard Drink | Weekly Limit | Daily Limit |
|---|---|---|---|
| 🇬🇧 United Kingdom | 8g (10ml) | 14 units | Spread over 3+ days |
| 🇺🇸 United States | 14g | M: 14 / W: 7 drinks | M: 2 / W: 1 drink |
| 🇦🇺 Australia | 10g | 10 standard drinks | No more than 4 |
| 🇪🇺 Europe (varies) | 10-12g | 14-21 units | 2-3 drinks |
UK Chief Medical Officers' Guidelines
Maximum weekly consumption for both men and women. Spread over 3 or more days.
Frequently Asked Questions
Why do different countries have different standard drink sizes?
Each country defines their standard drink based on their own public health research, drinking culture, and typical serving sizes. The UK uses 8g, the US uses 14g, and Australia uses 10g of pure alcohol as one standard unit.
Is there a safe level of alcohol consumption?
Recent research (Lancet 2018) suggests there is no completely safe level of alcohol consumption. However, staying within low-risk guidelines (14 units/week in UK) significantly reduces health risks compared to heavier drinking.
How many calories are in alcoholic drinks?
Alcohol contains 7 calories per gram (almost as much as fat). A pint of beer has 180-250 calories, a glass of wine 120-160 calories, and a spirit measure 55-65 calories (before mixers). A week of drinking could add 1000+ hidden calories.
What is binge drinking?
Binge drinking is consuming 6+ units in a single session for women, or 8+ for men. This pattern is particularly harmful as it overwhelms the liver's processing capacity and significantly increases risk of accidents and health damage.
How long does alcohol stay in my system?
The body processes alcohol at about 1 unit per hour. A single drink might take 1-2 hours, but a heavy night (10+ units) could mean alcohol remains in your system for 12+ hours. You may still be over the drink-drive limit the morning after.
Why are wine glasses getting bigger?
Average wine glass sizes have tripled since the 1970s. A "large" glass (250ml) of 13% wine contains 3.25 units - nearly a quarter of the weekly limit. Always check the actual volume when counting units.
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