30 FREE TOOLS
Health & Fitness calculators
Explore body measurements, activity and nutrition estimates while keeping the selected method visible.
← All calculators
BMI Calculator
Calculate adult BMI from height and weight, with its screening category.
BMR Calculator
Estimate energy used at rest from age, height, weight and equation settings.
TDEE Calculator
Estimate total daily energy expenditure using BMR and activity level.
Calorie Calculator
Estimate daily maintenance calories from body measurements and activity level.
Calorie Deficit Calculator
Calculate a calorie target by applying a deficit to maintenance calories.
Ideal Weight Calculator
Explore formula-based adult weight estimates for your height.
Body Fat Calculator
Estimate body-fat percentage using the measurements requested by the method.
Lean Body Mass Calculator
Estimate lean body mass from body weight and body-fat percentage.
Waist-to-Height Ratio Calculator
Compare waist size with height using the same measurement units.
Waist-to-Hip Ratio Calculator
Calculate waist-to-hip ratio from your two circumference measurements.
Protein Intake Calculator
Estimate daily protein using body weight and a chosen grams-per-kilogram target.
Water Intake Calculator
Estimate daily water intake from body weight and an entered intake factor.
Macro Calculator
Split a calorie target between protein, carbohydrate and fat.
Carb Intake Calculator
Convert a carbohydrate calorie allocation into daily grams.
Fat Intake Calculator
Convert a fat calorie allocation into daily grams.
Pregnancy Due Date Calculator
Estimate a pregnancy due date from the date and cycle assumptions entered.
Ovulation Calculator
Estimate an ovulation window from cycle dates and typical cycle length.
Period Calculator
Estimate a next-period date using your usual cycle length.
Pregnancy Weight Gain Calculator
Compare pregnancy weight gain with the ranges used by the selected method.
Heart Rate Zone Calculator
Estimate exercise heart-rate zones from age and selected intensity ranges.
Target Heart Rate Calculator
Estimate a target exercise heart rate using the method and intensity entered.
Pace Calculator
Calculate running pace from the distance covered and elapsed time.
Running Calorie Calculator
Estimate running energy expenditure from duration, weight and activity intensity.
Walking Calorie Calculator
Estimate walking energy expenditure using weight, duration and activity intensity.
Steps to Calories Calculator
Estimate calories for a walk using steps and the entered walking assumptions.
Sleep Calculator
Find a bedtime from wake-up time, planned sleep and time to fall asleep.
Blood Pressure Category Calculator
Compare adult blood-pressure readings with the screening thresholds shown.
Creatinine Clearance Calculator
Estimate creatinine clearance using the stated equation and patient measurements.
eGFR Calculator
Estimate eGFR from creatinine and the demographic inputs required by the equation.
Child Height Predictor
Estimate a child's adult height range from parental heights.
