🍺 BAC Calculator - Blood Alcohol Content
BAC Calculator UK - Frequently Asked Questions
What is the legal drink-drive limit in the UK?
England, Wales, Northern Ireland: 80mg alcohol per 100ml blood (0.08% BAC). Scotland: 50mg per 100ml (0.05% BAC). Penalties include 6-12 month driving ban, unlimited fine, and possible prison sentence.
How is BAC calculated?
BAC is calculated using the Widmark formula: BAC = (Alcohol consumed in grams / (Body weight in grams × r)) - (Metabolism rate × hours). 'r' is the distribution ratio (0.68 for men, 0.55 for women). UK units: 1 unit = 10ml pure alcohol.
How long does it take for BAC to reach zero?
The body metabolizes alcohol at approximately 0.015% BAC per hour (about 1 UK unit per hour). A BAC of 0.08% takes roughly 5-6 hours to reach zero. However, this varies by individual factors.
Can I drive the morning after drinking?
You may still be over the limit the morning after. If you consumed 10 units (e.g., 5 pints), it takes approximately 10 hours to leave your system. Always wait sufficient time and consider using a personal breathalyzer.