❤️ Health & Fitness

Browse all 30 Health & Fitness calculators below. Each one runs instantly in your browser, is completely free to use, and comes with a plain-language explanation of the formula behind it.

⚖️ BMI Calculator Calculate your Body Mass Index and see your weight category. 🔥 BMR Calculator Estimate your Basal Metabolic Rate — calories burned at rest. 🍎 Calorie Calculator Estimate daily calories needed to maintain, lose or gain weight. 📊 Body Fat Calculator Estimate your body fat percentage using the U.S. Navy method. 🎯 Ideal Weight Calculator Find a healthy weight range for your height. 💧 Water Intake Calculator Estimate how much water you should drink daily. 🤰 Pregnancy Due Date Calculator Estimate your due date from your last menstrual period. ⚡ TDEE Calculator Calculate your Total Daily Energy Expenditure — calories burned per day. 🥗 Macro Calculator Split your daily calories into carbs, protein and fat grams. 💪 Lean Body Mass Calculator Estimate your lean body mass and fat mass. 🏋️ One Rep Max Calculator Estimate the maximum weight you can lift for one repetition. 🏃 Pace Calculator Calculate your running pace and speed from distance and time. 🍗 Protein Calculator Estimate your daily protein needs based on activity. 🔥 Calories Burned Calculator Estimate calories burned during exercise. 🌸 Ovulation Calculator Estimate your ovulation day and fertile window. 📆 Period Calculator Predict the date of your next few periods. 💓 Target Heart Rate Calculator Find your training heart-rate zones. 🍞 Carbohydrate Calculator Find your daily carbohydrate target from your calories. 🥑 Fat Intake Calculator Find your daily fat target from your calories. 🧍 Body Surface Area Calculator Estimate your body surface area (BSA). 🍷 BAC Calculator Estimate blood alcohol concentration (educational). 📏 Waist-to-Hip Ratio Calculator Calculate your waist-to-hip ratio and health risk category. 🤰 Pregnancy Weight Gain Calculator Find the recommended weight gain range during pregnancy. 🌱 Conception Calculator Estimate your conception date from your last period. 🩺 GFR Calculator Estimate kidney function (eGFR) using the CKD-EPI 2021 equation. 🧍 Body Frame Size Calculator Find your body frame size from height and wrist size. ⚖️ Healthy Weight Calculator Find the healthy weight range for your height. 📏 Waist-to-Height Ratio Calculator Calculate your waist-to-height ratio, a key health indicator. 🧍 Ponderal Index Calculator Calculate the ponderal index, an alternative to BMI. 📉 Weight Loss Percentage Calculator Calculate what percentage of weight you have lost.