What is the legal BAC limit in the US?

In the United States, the legal blood alcohol limit for driving is 0.08% (80 mg/dL) in all 50 states. Utah lowered its limit to 0.05% in 2018, becoming the most restrictive US state. Commercial truck drivers: 0.04%. Drivers under 21: effectively zero (0.00–0.02% depending on state).

What is the legal BAC limit in the UK?

England and Wales: 0.08% (80 mg/100 mL) — the same as the US. Scotland: 0.05% (50 mg/100 mL), lowered in 2014. Northern Ireland: 0.08%. Scotland's lower limit aligns with most of Europe (Germany, France, Spain, Italy: 0.05%). The lower limit in Scotland appears to have reduced drink-driving casualties.

Why does Japan have such a strict BAC limit?

Japan has one of the world's strictest drink-driving laws: a legal BAC limit of 0.03% (the absolute lowest among major countries). Japan's 2001 Road Traffic Law revision dramatically reduced the limit from 0.05% and introduced mandatory 5-year prison sentences for fatal drunk driving. Passengers and organizers of drinking events can also be penalized. Japan now has one of the world's lowest rates of alcohol-related traffic fatalities per capita.

How is BAC calculated?

BAC is estimated using the Widmark formula: BAC = (alcohol in grams / (body weight in kg × r × 1000)) × 100, where r = 0.73 for men and 0.66 for women (volume of distribution constant). Alcohol is eliminated at approximately 0.015% per hour. This is an estimate — actual BAC varies with food intake, genetics, liver function, and hydration.

🇺🇸 USA 0.08% 🇬🇧 Scotland 0.05% 🇩🇪 Germany 0.05% 🇯🇵 Japan 0.03%

BAC Calculator

Estimate your blood alcohol content (BAC) and see whether you're above the legal driving limit in different countries. Legal limits vary from 0.00% (zero tolerance) to 0.08% — and the same number of drinks puts you over the limit in some countries but not others.

Quick Answer

Legal driving BAC limits vary widely: US / Canada / UK (England) / Australia: 0.08%. Germany / France / Spain / Italy / Scotland: 0.05%. Japan: 0.03%. Sweden / Norway: 0.02%. Saudi Arabia, Pakistan, many Muslim-majority countries: 0.00% (zero tolerance). Japan's strict limit and heavy penalties have made it one of the world's safest countries for drunk driving.

⚠️ This is an estimate only. BAC varies by individual metabolism, food intake, hydration, and medications. Never drink and drive.

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Legal BAC Driving Limits by Country

Country	Limit (%)	Notes
🇺🇸 USA (most states)	0.080%	Utah: 0.05% since 2018; commercial drivers: 0.04%
🇨🇦 Canada	0.080%	Administrative suspension at 0.05% in most provinces
🇬🇧 UK (England & Wales)	0.080%	Scotland lowered to 0.05% in 2014
🇦🇺 Australia	0.050%	New drivers (P-plate): 0.00% in most states
🇩🇪 Germany	0.050%	Novice drivers and under 21: 0.00%
🇫🇷 France	0.050%	Novice drivers: 0.020%
🇪🇸 Spain	0.050%	New drivers: 0.030%
🇮🇹 Italy	0.050%	Under 21 and new drivers: 0.00%
🇯🇵 Japan	0.030%	Strictest major country; 5-year prison sentence for fatalities
🇰🇷 South Korea	0.030%	License suspended at 0.03%; revoked at 0.08%
🇨🇳 China	0.020%	DUI at 0.08%; severe penalties
🇸🇪 Sweden / 🇳🇴 Norway	0.020%	Among lowest in Europe
🇷🇺 Russia	0.035%	0.00% in practice; strict enforcement
🇸🇦 Saudi Arabia / 🇵🇰 Pakistan	0.000%	Zero tolerance; alcohol is prohibited

Frequently Asked Questions

How many drinks does it take to reach 0.08%? ▾

It varies significantly by body weight and sex. For an average 70 kg (154 lb) male: approximately 3–4 standard drinks in 2 hours can reach 0.08%. For a 55 kg (121 lb) female: as few as 2–3 drinks. A "standard drink" is 14g pure alcohol (US) = 10g (UK) = 12.5g (Australia) — equivalent to one 355ml beer (5%), 150ml wine (12%), or 44ml spirit (40%). These are estimates only.

Why does Australia have a stricter BAC limit than the US? ▾

Australia lowered its BAC limit to 0.05% in the 1990s, aligned with European standards and based on evidence that impairment begins at lower BAC levels than 0.08%. Road safety research (from Monash University Accident Research Centre) supported this policy. The US maintains 0.08% partly due to lobbying by the alcohol industry and hospitality sector — despite evidence that 0.05% would prevent additional fatalities.