Blood Alcohol Limit by Country
Compare drink-drive limits across countries. Shows legal BAC limits, drink equivalents and penalties for different nations.
BAC Information
Drink-Driving Limits by Country
🚗 BAC and Impairment
⚠️ Important Reminder
This calculator provides estimates only. Individual responses to alcohol vary based on food intake, medication, health conditions, and other factors. When in doubt, don't drive. Use a taxi, rideshare, or designated driver instead. Drink responsibly and stay safe.
How Drink-Drive Limits Compare Across Countries
Legal blood alcohol limits range from zero tolerance to 0.08% BAC depending on country. The lowest enforcement is in the UAE and Saudi Arabia at 0.00% (any alcohol behind the wheel is illegal). Sweden, Norway and Poland sit at 0.02%. Most of continental Europe (Germany, France, Spain, Italy) is at 0.05%. The UK (England, Wales, Northern Ireland), the US and Canada are at 0.08%. Scotland tightened to 0.05% in 2014 but the rest of the UK kept the older 0.08% limit. The calculator highlights the limit for the country you select and compares your estimated BAC against it.
Worked example. A 70kg adult drinks 2 standard drinks (each 14g of pure alcohol, roughly a pint of 4% beer) over an hour. The Widmark formula gives a starting BAC of around 0.05 to 0.06%, dropping at 0.015% per hour. After 1 hour, BAC sits around 0.04 to 0.05%. That is below the UK limit of 0.08% but at or above the Scottish, French and German limits of 0.05%. Same drinks, same body, three different countries, three different legal answers.
Why a Standard Drink is Not the Same Everywhere
The calculator uses 14g of pure alcohol per drink, the US definition. UK 'units' are 8g of alcohol each, Australia uses 10g, Japan uses about 19.75g. So 'one drink' on this tool is roughly 1.75 UK units, 1.4 Australian standard drinks, or 0.7 Japanese single drinks. If you are using UK units and want to convert, multiply UK units by 0.57 to get this tool's drink count. A pint of 4% beer is about 2.3 UK units which is 1.3 'drinks' on this calculator. A 175ml glass of 13% wine is 2.3 UK units, also about 1.3 drinks here.
Drink size matters more than people realise. A British pub pint at 5.2% beer carries 3 UK units (1.7 drinks). A 250ml glass of 13.5% wine carries 3.4 UK units (1.9 drinks). 'Two drinks' in a UK setting, calculated honestly, is often 4 to 5 UK units, which is 2.3 to 2.9 drinks on this tool. The result is a BAC closer to 0.08-0.10% for the same body weight. The [wedding drink calculator](/wedding-drink-calculator) is the same family of maths if you are working out drink quantities for an event.
Why a Calculator Cannot Tell You If You Are Safe to Drive
Real BAC depends on more than weight, drinks and time. Genetics affect alcohol dehydrogenase activity, sex changes the water-to-tissue ratio (women generally hit higher BAC than men at the same drinks and weight, by about 30%), food in the stomach slows absorption, fitness and hydration shift it. The Widmark formula this calculator uses is a population average and individual results can differ by 30 to 40%. So if the tool says 0.06% and the limit is 0.08%, your real BAC could be anywhere from 0.04% to 0.09%.
Police breath tests measure breath alcohol, which is converted to blood alcohol equivalent. The conversion ratio is set by law per country and is conservative: a borderline reading on this calculator can fail a breath test. Penalties scale fast: in the UK, drink-driving is a 12-month minimum disqualification, an unlimited fine, possible 6 months prison. In Sweden a result over 0.10% can be 2 years prison. In France first offence at 0.05% is a 4,500 EUR fine and 6-point licence penalty. The only safe BAC is zero, which means no alcohol within at least 12 hours of driving (longer if you drank heavily the night before). If in doubt, do not drive - taxi, public transport or a taxi-like app.
Specific Country Rules to Know
Some countries have lower limits for new drivers. Germany has 0.00% for under-21s and drivers in the first 2 years of holding a licence. France imposes 0.02% for new drivers (within 2 years of licence). Australia varies by state but most have 0.00% for learner and probationary drivers. The US has 0.02% for under-21 drivers in most states (zero tolerance). The calculator uses the standard adult limit; if you are a new or under-21 driver, treat any reading above 0.02% as illegal in most countries.
Commercial drivers face stricter limits everywhere. Truckers, bus drivers and taxi drivers in the UK and most of Europe are at 0.02% or zero. Aviation pilots in most jurisdictions are at 0.02% with an 8-hour bottle-to-throttle rule. Cycling under the influence is illegal in many European countries (Germany at 0.16% for cyclists, France at 0.05% same as drivers). The [travel visa checker](/travel-visa-checker) covers entry rules but each country's transport laws are worth checking before driving abroad - especially Italy, Czech Republic, Hungary and Romania, all at 0.00% for any driver.
Frequently Asked Questions
Is the UK limit really 0.08% when most of Europe is 0.05%?
England, Wales and Northern Ireland are still 0.08% BAC, the joint highest in Europe alongside Malta. Scotland reduced its limit to 0.05% in December 2014. There has been ongoing campaigning to bring the rest of the UK in line with Scotland and the EU norm but the law has not changed. So a driver crossing from Carlisle to Gretna sees the legal limit drop in one step.
How long does it take to be safe to drive after drinking?
Roughly 1 hour per UK unit, but the safe answer is longer. Alcohol elimination averages 0.015% BAC per hour, so a 0.06% peak takes around 4 hours to drop to 0.00%. After heavy drinking (5+ drinks), expect 8 to 12 hours minimum and potentially still over the limit the next morning. Coffee, cold showers and food do not speed up elimination - only time does. Plan ahead: if you drink past 11pm, do not drive before lunch.
What is the limit in Saudi Arabia, Dubai and other zero-tolerance countries?
0.00% BAC. In the UAE, Kuwait, Qatar and Saudi Arabia, any detectable alcohol behind the wheel is a serious criminal offence carrying jail time, fines and deportation for foreigners. This applies regardless of where the alcohol was consumed - drinking on a flight in and then driving from the airport can be enough to trigger prosecution. If travelling to these countries, do not drink anything if you might drive.
Does my body weight really change the legal answer?
Yes, significantly. The same 3 drinks produce 0.07% BAC in a 60kg adult, 0.05% in a 80kg adult, 0.04% in a 100kg adult. So at the UK 0.08% limit a heavier person can drink more before hitting it - but reaction time, judgement and coordination are impaired well below the legal limit for everyone. The [tipping guide abroad](/tipping-guide-abroad) is the kind of pre-trip check; this is another: know the limit, know your weight, plan transport home before the first drink.
Can I be over the limit the morning after?
Easily. 8 standard drinks finished at midnight gives a BAC around 0.16%; at 0.015% elimination per hour, that drops to 0.06% by 7am - still over the Scottish, French and German limits, and only just under the English limit. Police set up morning checkpoints partly because of this. Heavy drinking the night before driving is one of the most common ways legitimate adults end up failing a breath test. If you want to drive at 8am and you drank 4+ standard drinks the previous evening, the safe rule is do not.
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