Health & Fitness Calculators
Health and fitness calculators for everyday questions. The BMI calculator uses the World Health Organization adult ranges — under 18.5 underweight, 18.5–24.9 healthy weight, 25–29.9 overweight and 30 or more obese — though BMI doesn't account for muscle, age or body shape. The pace converter turns running pace into speed and finish times for 5K, 10K, half and full marathons; the weight converter switches between kilograms, pounds and stones; and the jet lag calculator shows how far your body clock has to shift after a flight, with simple tips to adjust. These give general estimates only and are not medical advice.
6 tools
- Weight ConverterConvert kilograms, grams, pounds, ounces, stones and tonnes.Converters
- BMI CalculatorCalculate body mass index in metric or imperial units and see the healthy weight range for your height.Calculators
- Pregnancy Due Date CalculatorEstimate your baby’s due date from your last period, conception date or IVF transfer — with how many weeks pregnant you are.Calculators
- Sleep CalculatorFind the best time to go to bed or wake up, in 90-minute sleep cycles, so you wake between cycles rather than in deep sleep.Calculators
- Running Pace ConverterConvert running pace per km or mile to speed, and predict 5K, 10K, half and full marathon times.Converters
- Jet Lag CalculatorSee the time difference for your trip, which way your body clock has to shift and simple tips to adjust faster.Date & Time