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Achieve your wellness goals with our comprehensive health and fitness calculators. Calculate your TDEE, BMR, body fat percentage, ideal weight, protein needs, calories burned during exercise, heart rate training zones, and more. Backed by validated formulas like Mifflin-St Jeor, Karvonen, and US Navy methods.
21 free health calculators and tools to help you get things done.
Showing all 21 tools
Find your best bedtime or wake-up time for full cycles.
→💧Calculate your daily water intake based on weight, activity level, and climate.
→🔥Calculate your TDEE, BMR, and target calories for weight loss, maintenance, or muscle gain.
→🧍Calculate your body fat percentage using the US Navy circumference method.
→⚖️Calculate your ideal body weight using four clinical formulas.
→🥩Calculate your daily protein needs based on weight, goal, and activity level.
→🚶Calculate calories burned from walking based on steps, weight, and speed.
→🏃Calculate calories burned during any exercise using MET values.
→❤️Calculate your heart rate training zones using the Karvonen formula.
→🔥Calculate your BMR using the Mifflin-St Jeor equation.
→🥗Calculate your daily macronutrient targets based on weight, goal, and activity.
→⏳Track your intermittent fasting with a live countdown timer.
→🏃Calculate your running pace and estimate race finish times.
→☕Calculate your daily caffeine intake from coffee, tea, energy drinks, and soda.
→💪Estimate your one rep max using Epley, Brzycki, Lombardi, and Lander formulas.
→❤️Estimate your VO₂ max using resting heart rate, Cooper test, or 1.5-mile run.
→💪Calculate calories burned doing push-ups based on reps, weight, and intensity.
→👶Calculate your pregnancy due date using LMP, conception date, or ultrasound.
→🍬Calculate your daily sugar intake from drinks, snacks, and added sugar.
→🧘Practice guided breathing exercises with an animated circle. Box, 4-7-8, and Relax modes.
→🕉️Meditation timer with ambient sounds, interval bells, and fullscreen mode.
→Learn more with our educational guides and tutorials.
Learn how sleep cycles work, the 90-minute rule, and how to use a sleep calculator to find your optimal bedtime and wake-up time.
Read article →Calculate your personalized daily water intake based on weight, activity level, and climate. Learn hydration tips and spot dehydration signs.
Read article →Learn what TDEE is, how to calculate your total daily energy expenditure, BMR, and target calories using the Mifflin-St Jeor equation.
Read article →Learn how to calculate your body fat percentage using the US Navy circumference method. Includes measurement instructions, body fat categories, and tips for improving body composition.
Read article →Common questions about our tools and calculators.
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