1. You enter a typical week
You provide a rough number of drinks per week, your main drink type, age, weight and your usual drinking pattern. The questions are kept short to make the tool quick to complete.
Alcohol consumption calculator & self-assessment
Enter a typical week of drinking, choose your main drink type and pattern, and see your estimated weekly alcohol units together with a brief explanation.
Self-assessment questionnaire
Try to think about a normal week. If your drinking varies, choose an average pattern rather than your very heaviest or lightest week.
Your answers are processed only in your browser and are not stored or sent to a server.
Your estimated result
Weekly alcohol units
0.0
Risk category
Not calculated yet
What this means
Once you complete the questions, a short explanation will appear here, based on your estimated weekly alcohol units.
General guidance
You can adjust your answers at any time and see how your result changes. Many people use this as a starting point for planning to cut down or for talking with a health professional.
If you feel unable to reduce or stop drinking, or if you experience withdrawal symptoms such as
shaking, sweating or nausea, seek medical advice before making major changes.
Alcohol unit converter
Use the converter to see how many alcohol units come from beer, wine and spirits in a typical week. This can help you understand how quickly units add up.
Regular bottle or glass (330–500 ml, about 5% ABV)
One glass (about 150 ml, about 12% ABV)
One shot or measure (about 40 ml, about 40% ABV)
Units from beer
0.0
Units from wine
0.0
Units from spirits
0.0
Total units per week
0.0
How this calculator works
The tool combines a simple questionnaire with approximate alcohol unit values for beer, wine and spirits to give you an easy-to-understand summary of your drinking.
2. We estimate your alcohol units
The calculator converts your drinks into alcohol units using standard assumptions for beer, wine and spirits. This gives you a single number that is easier to compare with guidelines.
3. You see a broad risk range
Based on your estimated units, you receive a low, increasing, high or very high risk label together with a short explanation and suggestions to consider.
The calculator cannot diagnose alcohol use disorder and does not consider all health conditions or medicines.
It is a starting point for reflection and, if needed, for discussion with a health professional.
How do I use the calculator?
You can repeat the calculation as often as you like, adjusting your answers to see how changes in your drinking would affect your weekly units and risk range.
Step 1 – Enter your weekly drinks
Start with a realistic estimate of how many drinks you usually have in an average week. If your drinking varies, avoid choosing only your very heaviest or lightest week.
Step 2 – Choose drink type & pattern
Select your main drink type (beer, wine or spirits) and the pattern that best describes your usual drinking. Drinking the same amount in one or two sessions may have different risks than spreading it out.
Step 3 – Review and experiment
Click “Calculate” to see your result, then try changing the number of drinks or pattern. Many people find this helpful when planning to cut down or track progress over time.
Alcohol units and why they matter
Alcohol units are a simple way to compare different drinks by expressing them in the same measure of pure alcohol. This makes it easier to see the total amount you drink over a week.
The unit converter on this page uses approximate values for a typical serving:
- Beer – about 2 units per regular bottle or glass (330–500 ml, ~5% ABV).
- Wine – about 2.1 units per glass (150 ml, ~12% ABV).
- Spirits – about 1 unit per shot or measure (40 ml, ~40% ABV).
Guidelines differ between countries, but as a general rule, higher weekly unit totals and frequent heavy sessions are associated with increased risks to health, mood, sleep and relationships.
If you are worried about your drinking
If this self-assessment raises concerns for you, consider speaking to a doctor, nurse, counsellor or alcohol support service. Early conversations can make change easier and safer.
You may want to seek support if:
- You regularly drink more than you intended to.
- You struggle to cut down or stop drinking once you start.
- You notice an impact on your physical health, mood, sleep or relationships.
- You experience withdrawal symptoms when you try to reduce or stop drinking.
If you experience severe symptoms (such as confusion, hallucinations, seizures or chest pain), seek urgent medical help immediately.