BAC Limits Around the World
What the legal driving limit is in your country — and why it matters
Most Americans know the legal driving limit is 0.08% BAC. Travel to Canada, Australia, or the UK — or move there — and that number changes. In some countries you can lose your licence at half that. In parts of India, any alcohol at all is prohibited by law.
If you use a BAC calculator that only knows about US laws, you’re flying blind the moment you cross a border.
Why BAC Limits Differ
Blood Alcohol Content limits are set by individual countries — and sometimes states or provinces — based on their own road safety research and political history. There’s no global standard. The 0.08% limit used in the United States came from a 1980s federal push to standardize drunk driving laws. Before that, many states allowed 0.10% or higher.
Meanwhile, most of Europe, Canada, and Australia have concluded that impairment is significant well below 0.08%, and have set their limits accordingly.
Canada: Two Limits in One
Canada has a system most drivers don’t fully understand until they get pulled over. There are effectively two thresholds:
| BAC Range | Status | Consequences |
|---|---|---|
| 0.05% – 0.079% | Warn Range | Immediate 7-day licence suspension, vehicle impound, $550+ fine (Ontario). No court, no appeal. |
| 0.08%+ | Criminal DUI | Permanent record, minimum $1,000 fine, minimum 1-year licence suspension. |
For practical purposes, 0.05% is the real limit in Canada if you want to avoid consequences. Alcophone uses this as your effective legal threshold when you select a Canadian province.
Australia: Stricter Than You Think
Australia’s 0.05% limit is enforced uniformly across all eight states and territories. Random breath testing (RBT) is far more common than in the US — police set up checkpoints regularly, and you don’t need to be driving erratically to get tested.
“One drink per hour” is not a reliable rule here. A standard Australian drink (10g of alcohol) can push a 70kg person to around 0.02–0.03%, leaving very little margin before the 0.05% cutoff.
Scotland vs. the Rest of the UK
In 2014, Scotland lowered its limit from 0.08% to 0.05%, bringing it in line with most of Europe. England, Wales, and Northern Ireland kept 0.08%. If you’re driving across the border, the legal limit literally changes as you cross it.
Alcophone handles this correctly. Select your specific UK nation and you’ll see the right threshold for where you actually are.
India: Know Before You Go
India’s national limit of 0.03% is one of the strictest in the world among countries that permit alcohol — less than half the US limit. At 0.03%, a single standard drink can push many people over the threshold.
Three states — Bihar, Gujarat and Nagaland — have complete alcohol prohibition. In these states, driving after any alcohol consumption is illegal regardless of BAC.
Two more are partially dry. In Mizoram, only locally made wine and fruit beer are legal; spirits and all other liquor remain prohibited under the 2025 amendment, and Sundays and national holidays are dry days. In Manipur, alcohol is legal only in Greater Imphal, district headquarters, tourist locations and licensed hotels with 20 or more rooms — and prohibited everywhere else. Lakshadweep, dry for 47 years, repealed its prohibition on 5 June 2026. Alcophone marks Mizoram and Manipur as restricted and applies the national 0.03% driving limit throughout the country, prohibition states included.
Ireland: 0.05%, and 0.02% for New Drivers
Ireland’s general limit is 50 mg of alcohol per 100 ml of blood — 0.05%, the same as Australia and Scotland. Learner permit holders, drivers within two years of their first full licence and anyone driving without a licence for the vehicle are held to 20 mg (0.02%).
The same 0.02% applies while driving a truck, a bus, a car towing a heavy trailer, a work vehicle, or a taxi or hackney in the course of business — the rule follows the vehicle, not the driver, so a bus driver in their own car is on 0.05%. Alcophone asks about your licence and, separately, about the vehicle you are driving, and applies 0.02% when either one calls for it. Full table: BAC limits in Ireland.
The Common Mistake: Using a US-Only App Abroad
Most BAC calculator apps were built for the US market and hardcode 0.08% as “the limit.” If you’re in Ontario at 0.06%, a US-only app tells you you’re safe. You’re not — you’re in the warn range and can lose your licence on the spot.
Alcophone detects your country and region and applies the correct local threshold. Select Ontario and your warning zone starts at 0.05%. Select Scotland, same. Select Gujarat, and the app flags your location as a prohibition state; select Mizoram, and it shows what is and isn’t legal there.
Knowing your limit means knowing the local limit — not just the one from an app built for a different country.
More countries and languages coming soon
Support for additional regions is actively in development. If your country isn’t listed yet, it will be.
Check yourself against the local limit
The free BAC calculator on this site switches limit with the country you pick — USA (including Utah’s 0.05), Canadian provincial warn ranges and the under-22 rule, Australia, the UK, India and Ireland — and estimates your BAC with the same engine as the app. It is a simplified demo; the free app adds body measurements and meals, remembers every drink and calls a safe ride in one tap.
Know Your Local Limit
Alcophone automatically applies the correct BAC threshold for your country and region — free on Google Play.
Alcophone provides BAC estimates only. It is not a breathalyzer and cannot measure your actual blood alcohol content. Never drive after drinking, regardless of what any app says. Must be of legal drinking age in your country to use. © 2026 SafeMetrics4U. All rights reserved.