When Can I Drive After Drinking Calculator
Answer: rough estimate of when you might be under the drink drive limit. Do not rely on it to drive. Free.
1 unit ≈ half pint beer, 1 small glass wine, 1 single spirit (25 ml).
When can I drive after drinking?
This calculator gives a rough answer to: when can I drive after drinking? It uses a simple rule of about 1 unit of alcohol per hour for the body to process. Enter how many units you have had; it suggests a minimum wait. Metabolism varies – this is not reliable for deciding to drive. Never drive if you feel impaired. UK limit: 80 mg/100 ml (England/Wales/NI); Scotland is lower. When in doubt, do not drive.
Frequently Asked Questions
When can I drive after drinking?
UK legal limit is 80 mg alcohol per 100 ml blood. The body typically breaks down about 1 unit of alcohol per hour. This calculator estimates hours from your last drink until you might be under the limit. It is an estimate only; do not rely on it to drive – use a breathalyser or wait until the next day.
How long after drinking can I drive?
Estimate: 1 unit of alcohol per hour elimination. Enter the number of units you have had; the calculator suggests a minimum wait. Never drive if you feel impaired. When in doubt, do not drive.
Is the when can I drive after drinking calculator accurate?
No. Metabolism varies. This is a rough guide only. The only way to be sure is a calibrated breathalyser or waiting until you are sober. Never drive if over the limit or impaired.
What is the UK drink drive limit?
England, Wales and Northern Ireland: 80 mg alcohol per 100 ml blood (35 mcg per 100 ml breath). Scotland: 50 mg per 100 ml blood (22 mcg per 100 ml breath). This calculator does not replace legal or medical advice.
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