Health Calculators
BMI, calories, body composition — 7 calculators available.
BMI Calculator
Body Mass Index with WHO classification
Use CalculatorBMR Calculator
Basal metabolic rate, TDEE, and macro targets
Use CalculatorCalorie Deficit Calculator
Daily calorie target, timeline to goal weight, and macros
Use CalculatorBody Fat Calculator
US Navy method body fat %, fat mass, lean mass
Use CalculatorIdeal Weight Calculator
Devine, Robinson, Miller, and Hamwi formulas compared
Use CalculatorWater Intake Calculator
Daily water target with an hourly drinking schedule
Use CalculatorPregnancy Due Date Calculator
Estimate your baby's due date from your last period, conception date or IVF transfer date. See how far along you are and key pregnancy milestones.
Use CalculatorAbout Our Health Calculators
Understand your body with free health and fitness calculators. Check your BMI, estimate your BMR and daily calorie needs, plan a calorie deficit for weight loss, measure body fat with the U.S. Navy method, compare ideal weight formulas, find how much water to drink each day and estimate a pregnancy due date. These tools provide general estimates and are not a substitute for professional medical advice.