Alcohol Health Impact Calculator
Estimate the health impact of your weekly alcohol consumption, based on WHO dose-response research.
Example: A 40-year-old drinking 21 units of alcohol per week (about 10 pints of beer, or 2 bottles of wine) faces an estimated relative mortality risk increase of around 15–20% compared to someone drinking under the UK's 14-unit low-risk guideline — driven mainly by elevated risks of liver disease and certain cancers.
Based on WHO dose-response mortality research linking weekly alcohol intake to relative risk across multiple disease categories.
How this estimate is derived
- Model:
- WHO dose-response alcohol mortality research
- Primary reference:
- WHO Global Status Report on Alcohol and Health
- Implementation last reviewed:
- 2026-08-29
- Purpose:
- Educational risk estimation only; not a clinical diagnosis.
How this is calculated
Your weekly units are run through a dose-response curve derived from WHO Global Status Report on Alcohol and Health mortality multipliers, adjusted for sex and age. The result shows an estimated years-of-life impact, where your liver disease risk sits relative to the population, and the estimated uplift in relative cancer risk.
Risk rises non-linearly with consumption — the dose-response curve gets steeper at higher weekly unit counts rather than increasing at a constant rate, which is why cutting back from heavy drinking typically produces a larger relative risk reduction than the same unit reduction would at a lower starting level. Alcohol consumption is also one of several lifestyle inputs used in the Biological Age calculator and the Longevity Estimator, which combine it with exercise, sleep, diet, and other factors for a broader lifestyle-adjusted picture.
Frequently asked questions
- What counts as one "unit"?
- One standard unit is 10 grams of pure alcohol — roughly a small glass of wine, half a pint of average-strength beer, or a single spirit measure.
- Why does sex affect the estimate?
- WHO dose-response research shows alcohol-related risk per unit tends to be higher for women, largely due to lower average body water content affecting blood alcohol concentration per unit consumed.
- Is this a medical assessment?
- No. This is a population-level statistical estimate derived from WHO dose-response mortality research, not a personal medical risk assessment. Speak with a healthcare provider about your own drinking and health.
- How is the years-of-life impact calculated?
- Your weekly units are mapped onto a dose-response curve built from WHO Global Status Report on Alcohol and Health mortality multipliers, adjusted for your age and sex — the curve translates a given consumption level into an estimated shift in life expectancy relative to a non-drinker.
- What is a "unit" of alcohol?
- One standard unit is 10 grams of pure alcohol — roughly a small (125ml) glass of wine, half a pint of average-strength beer, or a single 25ml spirit measure. Larger servings or stronger drinks contain multiple units.
- What is the recommended weekly alcohol limit?
- Guidelines vary by country, but many health authorities recommend no more than 14 units per week for both men and women, spread across several days rather than consumed in one or two sessions. Some countries set separate, higher limits for men; increasingly, guidance is converging toward lower recommended limits as research on cancer risk has strengthened.
- Does drinking pattern matter, not just total units?
- Yes — this calculator only accounts for total weekly units, but research shows that concentrating the same total into fewer heavy sessions (binge drinking) carries additional acute risks, such as accidents and alcohol poisoning, beyond what a weekly-average dose-response estimate captures.
- Can the health impact be reversed by stopping drinking?
- Many alcohol-related health risks decline over time after reducing or stopping drinking, though the degree and speed of reversal depends on the specific condition and how much cumulative damage has already occurred — liver health in particular can improve substantially within months of sustained reduction.