Health
Free health and fitness calculators for BMI, daily calories, ideal weight, body fat, running pace, sleep cycles, and water intake. They use standard, widely cited formulas and are intended for general guidance only — not a substitute for advice from a qualified medical professional.
BMI Calculator
kg/m²Calculate your Body Mass Index (BMI) instantly from your height and weight. See your BMI category.
Body Fat Percentage Calculator
BF%Estimate body fat percentage from BMI using the Deurenberg formula.
Daily Calorie Calculator
TDEEEstimate daily calories needed based on age, weight, height, and activity level using the Mifflin-St Jeor equation.
Daily Water Intake Calculator
L/dayCalculate how much water you should drink daily based on your weight.
Ideal Weight Calculator
ideal kgCalculate your ideal body weight based on height using the Devine formula.
Running Pace Calculator
min/kmCalculate your running pace per mile or kilometer from distance and time.
Sleep Cycle Calculator
zzzCalculate optimal wake-up times based on 90-minute sleep cycles. Enter your bedtime to see when to wake up feeling refreshed.