If you've drunk any alcohol, the safest bet is not drive at all.
But you can work out how much that cheeky pint is really costing you with our alcohol unit and calorie calculator*:
What's the drink-drive limit?
In England and Wales, the drink-drive alcohol limit for drivers is:
- 80mg of alcohol per 100ml of blood
- 107mg of alcohol per 100ml of urine
- 35 micrograms of alcohol per 100ml of breath
In Scotland, the drink-drive alcohol limit has been reduced to:
- 50mg of alcohol per 100ml of blood
- 67mg of alcohol per 100ml of urine
- 22 micrograms of alcohol per 100ml of breath
Despite this guidance, there's no foolproof way of drinking and staying under the limit because alcohol affects each individual differently.
What's a unit?
It's the measure of the amount of alcohol in a drink. One alcohol unit is measured as 10ml or 8g of pure alcohol.
A typical pint contains around one to two units, and a glass of wine can be between one and a half to three units, depending on the strength and the size of the glass.
Know your limits
Factors like your weight, sex and how much you've eaten, all contribute to how your body responds to alcohol, so it'll affect everyone differently.
After a drink or two, you might think you're fine to drive.
But even small amounts of alcohol can set you over the limit, so it's better to be safe than sorry and stay out of the car.
How many calories can I have each day?
According to the NHS, both men and women should be having a healthy balanced diet and should stick to around:
- 2,500 calories for men
- 2,000 calories for women
Other factors can affect this, like how active you are and how fast your metabolism is.
*The alcohol unit and calorie calculator is intended as a rough guide only, and is NOT a substitute for common sense. None for the road is the best approach.