Free health calculators — BMI, BMR, calories, ideal weight, body fat, water intake and other wellness metrics.
Convert blood glucose from mg/dL to mmol/L.
Check your Body Mass Index (BMI) and see whether you are underweight, normal, overweight or obese.
Find your Basal Metabolic Rate — the calories your body burns at rest.
Estimate your body fat percentage using the U.S. Navy method.
Calculate body surface area using the Mosteller formula.
Find your daily calorie needs to maintain, lose or gain weight.
Estimate a child's adult height from the parents' heights.
Find your training heart-rate zones from your age.
Find your healthy weight range and ideal weight for your height.
Split your daily calories into protein, carbs and fat.
Estimate your maximum heart rate from your age.
Estimate your ovulation day and fertile window.
Estimate your due date from your last menstrual period.
Find your daily protein target based on your weight and goal.
Find the best bedtime or wake-up time using 90-minute sleep cycles.
See how much money smoking costs you each year.
Calculate your waist-to-hip ratio (WHR).
Find how much water you should drink each day.
SoonFind the daily deficit needed to lose weight.
SoonPlan calories and time to reach a target weight.
SoonAssess health risk from waist and height.
SoonFind your BMI Prime (ratio to upper healthy BMI).
SoonCalculate the Ponderal Index (a height-adjusted BMI).
SoonEstimate body fat using the US Army method.
SoonFind BMR from lean body mass (Katch-McArdle).
SoonEstimate maintenance calories for your goal.