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Health & Fitness

Body, sleep, nutrition and wellbeing calculators. All 17 run right in your browser.

🍼 Due Date Calculator Free Estimate a pregnancy due date. 💧 Water Intake Calculator Free Find how much water to drink each day. ⚖️ Ideal Weight Calculator Free Estimate a healthy weight for your height. 📏 Body Fat Calculator Free Estimate body fat percentage (US Navy method). 🏋️ One-Rep Max Calculator Free Estimate your 1RM from a lifted weight. 🏃 Running Pace Calculator Free Work out pace, time and distance for a run. 🥗 Macro Calculator Free Split calories into protein, carbs and fat. ❤️ Heart Rate Zones Free Find your target heart-rate training zones. 😴 Sleep Cycle Calculator Free Best times to wake based on sleep cycles. ☕ Caffeine Half-Life Free How much caffeine is still in your system. 🍺 BAC Estimator Free Rough blood alcohol estimate over time. 🚭 Smoking Cost Calculator Free What smoking costs per year, and quitting saves. 🌸 Ovulation Calculator Free Estimate your fertile window. 🩸 Blood Type Calculator Free Possible child blood types from parents. 🚶 Walking Calorie Burn Free Calories burned from steps or distance. 🥩 Protein Intake Calculator Free Daily protein target for your body weight. 🫁 Breathing Exercise Free Guided box breathing to calm down.