Health & Fitness Calculators
Understand your body metrics with free, accurate health calculators.
BMI Calculator Free BMI calculator for adults. Enter height and weight in metric or imperial units to get your Body Mass Index and weight category instantly. BMR Calculator Free BMR calculator. Calculate your Basal Metabolic Rate using the Mifflin-St Jeor equation. Find out how many calories you burn at rest. No sign-up. Body Fat Calculator Free body fat calculator using the U.S. Navy method. Estimate your body fat percentage from circumference measurements. No sign-up. Calorie Calculator Free calorie calculator. Estimate your daily calorie needs for weight loss, maintenance, or gain using the Mifflin-St Jeor equation. Instant results. Ideal Weight Calculator Free ideal weight calculator. Find your healthy weight range using the Devine formula and BMI. See your ideal body weight instantly. No sign-up. Macro Calculator Free macro calculator. Calculate your daily protein, carbohydrate, and fat targets based on your calories and goals. No sign-up. Ovulation Calculator Free ovulation calculator. Predict your ovulation date and fertile window based on your menstrual cycle. Plan for pregnancy with a 6-month calendar. No sign-up. Pace Calculator Free running pace calculator. Calculate your pace per mile or km, finishing time, or speed. Perfect for runners and race planning. No sign-up. Pregnancy Due Date Calculator Free pregnancy due date calculator. Estimate your due date based on your last period or conception date. See your pregnancy timeline and trimesters. No sign-up. Sleep Calculator Free sleep calculator. Find the best time to go to sleep or wake up based on 90-minute sleep cycles. Wake up refreshed. No sign-up. TDEE Calculator Free TDEE calculator. Calculate your Total Daily Energy Expenditure based on BMR and activity level. Find your maintenance calories. No sign-up. Water Intake Calculator Free water intake calculator. Find your daily hydration goal based on weight, activity, and climate. Get your personalized water target. No sign-up.
Know Your Numbers
Our health calculators use established formulas like Mifflin-St Jeor and the WHO BMI categories to give you reliable estimates. All tools are for informational purposes only and are not a substitute for professional medical advice.