← All health calculators
Fuel your body.
🔥 Calorie & Fitness
Fuel your body.
Train with real numbers.
Calculators for BMR, TDEE, calorie deficit, macros, resting calorie burn, rucking, target heart rate, one-rep max, pace, and VO2 max. Whether you're cutting, bulking, or just staying active — start with the right numbers.
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🔥
Calories & Metabolism
BMR, TDEE, resting burn, deficit, and macros
🔥New
Resting Calorie Burn Calculator
Calculate BMR using 3 formulas simultaneously (Mifflin, Harris-Benedict, Katch-McArdle) + TDEE by activity level.
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⚡Popular
BMR Calculator
Calculate your Basal Metabolic Rate — the calories your body burns at complete rest every day.
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🍽️Popular
Calorie Calculator
Calculate total daily energy expenditure (TDEE) based on age, weight, height, sex, and activity level.
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📉Popular
Calorie Deficit Calculator
Calculate your daily calorie deficit for weight loss — with weekly loss rate, timeline, and macro breakdown.
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🥗Popular
Macro Calculator
Calculate your optimal protein, carb, and fat targets based on your calorie goal and body composition goals.
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🎒New
Rucking Calorie Calculator
Calculate calories burned rucking (weighted walking) by body weight, pack weight, distance, and pace.
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🏃
Fitness & Performance
Heart rate zones, strength, running pace, and aerobic capacity
❤️Training
Target Heart Rate Calculator
Calculate your heart rate zones for fat burn, cardio, and peak training intensity by age and fitness level.
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🏋️Strength
One-Rep Max Calculator
Estimate your 1RM from any weight and reps — using Epley, Brzycki, and other validated formulas.
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🏃Running
Pace Calculator
Calculate running pace, finish time, or distance — for 5K, 10K, half marathon, and marathon planning.
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🫁Aerobic
VO2 Max Calculator
Estimate aerobic capacity from fitness tests or field data — with age and fitness level benchmarks.
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💧Recovery
Water Intake Calculator
Calculate daily hydration needs adjusted for body weight, activity level, and climate — essential for performance.
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