Health Calculators

BMI calculator for adults: enter height and weight in metric or imperial units to get your body mass index and weight category, with the formula shown.

BMR calculator using the Mifflin-St Jeor equation. Enter age, sex, height and weight to find the calories your body burns at rest each day.

Calorie calculator that estimates your TDEE, the calories you burn per day, plus targets for losing or gaining weight at your activity level.

Ideal weight calculator based on the Devine formula. Enter your height and sex to get a healthy target weight in both kilograms and pounds.

Estimate blood alcohol content (BAC) from drinks, body weight, sex and time using the Widmark formula. An estimate only, never a guide to whether it is safe to drive.