Explore 40 free fitness calculators for body composition, nutrition, strength, cardio, and fitness testing—without creating an account.
Focused calculators to help you understand your body, improve performance, and plan progress.
Calculate your Body Mass Index and healthy weight range.
Estimate your total daily energy expenditure and maintenance calories.
Estimate body fat percentage with the U.S. Navy circumference method.
Convert a calorie target into protein, carbohydrate, and fat grams.
Estimate one-repetition maximum and percentage-based training loads.
Calculate personalized training zones with heart-rate reserve.
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Choose a goal, then open one of its most popular calculators.
Understand weight, body fat, metabolic baseline, and health-risk markers.
Plan calories, macronutrients, protein, hydration, and body-weight goals.
Estimate maximums, training loads, barbell plates, volume, and relative strength.
Calculate pace, activity calories, step distance, and daily movement.
Plan effective rest periods, intervals, HIIT sessions, and circuits.
Personalize training zones, target heart rate, and aerobic-fitness estimates.
Explore every tool we have built to support your fitness goals.40 focused calculators. Built for every body.
View all 40 calculatorsChoose a category to find accurate, easy-to-understand tools for your next decision.
7 categories40 calculatorsUnderstand weight, body fat, metabolic baseline, and health-risk markers.
10 calculatorsPlan calories, macronutrients, protein, hydration, and body-weight goals.
8 calculatorsEstimate maximums, training loads, barbell plates, volume, and relative strength.
8 calculatorsPlan effective rest periods, intervals, HIIT sessions, and circuits.
2 calculatorsCalculate pace, activity calories, step distance, and daily movement.
6 calculatorsPersonalize training zones, target heart rate, and aerobic-fitness estimates.
3 calculatorsEstimate common military and muscular-endurance fitness test results.
3 calculatorsFind the right tool for every fitness goal.
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Search, filter, and choose from 40 purpose-built tools.
Calculate your Body Mass Index and healthy weight range.
Open calculator 02Body CompositionCompare your BMI with the upper threshold of the healthy range.
Open calculator 03Body CompositionEstimate the calories your body burns at complete rest.
Open calculator 04Body CompositionEstimate your total daily energy expenditure and maintenance calories.
Open calculator 05Body CompositionEstimate body fat percentage with the U.S. Navy circumference method.
Open calculator 06Body CompositionEstimate fat-free body mass from weight and circumference measurements.
Open calculator 07Body CompositionAssess muscular development relative to your height.
Open calculator 08Body CompositionCompare estimated ideal weights across established clinical formulas.
Open calculator 09Body CompositionScreen central adiposity with your waist-to-height ratio.
Open calculator 10Body CompositionEstimate fitness age from resting heart rate, BMI, and age.
Open calculator 11NutritionEstimate daily calories for weight loss, maintenance, or muscle gain.
Open calculator 12NutritionPlan a sustainable daily calorie deficit and weekly weight-loss rate.
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