Health & Fitness Calculators

Calculate your Body Mass Index using metric or imperial measurements. See your BMI category and healthy weight range.

Calculate your Total Daily Energy Expenditure and recommended calorie intake for weight loss, maintenance or gain.

Estimate your body fat percentage using the US Navy method with waist, neck and hip measurements.

Calculate your estimated due date from your last menstrual period. See key milestones and trimester progress.

Calculate alcohol units in your drinks. Track against the NHS guideline of 14 units per week.

Find the best bedtime or wake-up time based on 90-minute sleep cycles. Wake feeling refreshed.

Calculate running pace, finish time or distance. Supports km and mile splits for 5K, 10K, half marathon and marathon.

Calculate your recommended daily water intake based on weight, activity level and climate.

Calculate your ideal weight using Robinson, Miller, Devine and Hamwi formulas. See your healthy BMI range.

Convert steps to distance, calories and walking time based on your height and stride length.

Calculate your 5 heart rate training zones using the Karvonen formula with resting heart rate.

Calculate how long to reach your target weight with milestones and daily calorie deficit.

Calculate daily protein needs by weight and goal. See common protein sources per serving.

Estimate ovulation date and fertile window based on your last period and cycle length. See 3 cycles ahead.

Calculate daily protein, carbs and fat targets based on your body stats, activity and goal.

Calculate your waist-to-hip ratio and cardiovascular disease risk using WHO guidelines.

Calculate BMI for children aged 2-18 with age and gender-adjusted interpretation.