Maximize your workouts with our fitness calculators. Calculate your one rep max, track calories burned during exercise, find your optimal heart rate training zones, estimate VO₂ max, and plan your running pace. Whether you're a beginner or advanced athlete, these tools help you train smarter.
14 free fitness calculators and tools to help you get things done.
Showing all 14 tools
Calculate your TDEE, BMR, and target calories for weight loss, maintenance, or muscle gain.
→🔥Calculate your BMR using the Mifflin-St Jeor equation.
→🧍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 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.
→💪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.
→Learn more with our educational guides and tutorials.
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 →Learn how ideal body weight is calculated using the Devine, Robinson, Miller, and Hamwi formulas. Includes a healthy BMI weight range and tips for setting realistic weight goals.
Read article →Practical tips to get the most out of these tools.
Fitness calculators help you train smarter. The TDEE Calculator shows daily calorie needs based on activity level. The One Rep Max Calculator estimates your maximum lift using four validated formulas (Epley, Brzycki, Lombardi, Lander). The Heart Rate Zone Calculator applies the Karvonen formula to define five training intensity zones. The Calories Burned Calculator uses MET values for over 60 exercises. Use these tools together to plan nutrition and training around your goals.
Common questions about our tools and calculators.
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