Health & Fitness
Calculate BMI, calories, body fat, ideal weight and other health numbers.
Calculate your body mass index (BMI) from height and weight, in metric or imperial units.
Open toolEstimate your daily calorie needs (BMR and TDEE) and targets for losing or gaining weight.
Open toolCalculate your basal metabolic rate (BMR) - the calories your body burns at rest.
Open toolEstimate your body fat percentage using the US Navy circumference method.
Open toolEstimate your ideal body weight from your height using four well-known formulas.
Open toolEstimate how much water you should drink each day based on your weight and exercise.
Open toolEstimate your pregnancy due date and key milestones from your last period.
Open toolFind your most fertile days and likely ovulation date from your cycle.
Open toolEstimate your one-rep max (1RM) from a lift and see training weights by rep count.
Open toolWork out your running pace per km or mile and your average speed from distance and time.
Open toolFind your maximum heart rate and training zones for fat burn, cardio and peak effort.
Open toolAbout Health & Fitness
These health and fitness calculators turn a few simple measurements into the numbers people track most: body mass index (BMI), daily calories, basal metabolic rate, body fat percentage, ideal weight and more. Enter your details and get a clear result with easy-to-read guidance.
They are useful for planning a diet, a workout routine or a weight goal, and for understanding widely used health metrics. Each calculator uses standard, well-known formulas and supports both metric and imperial units.
Everything runs in your browser, so your measurements stay private on your device. These tools are for general information only and are not medical advice.