Health Calculators

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Army Body Fat Calculator

Estimate your body fat percentage using the U.S. Army tape test method. Based on gender, age, height, neck, and waist measurements.

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FFMI Calculator

Calculate your Fat-Free Mass Index and normalized FFMI. See how your muscularity compares to the natural genetic limit.

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VO2 Max Calculator

Estimate your VO2 max with 6 validated methods: Cooper run, walking test, step test, or no-exercise estimate. See fitness classification by age.

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One Rep Max (1RM) Calculator

Estimate your one rep max using 7 proven formulas. Full training load table for bench press, squat, deadlift, and more.

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Training Volume Calculator

Get personalized weekly set recommendations per muscle group based on your experience, goals, age, sleep, and recovery. With suggested workout splits.

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Bulking Calorie Calculator

Calculate your ideal calorie surplus for lean muscle gain. Get bulking calories, macro breakdown, and weekly weight gain estimate.

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Creatine Dosage Calculator

Calculate your optimal creatine dose based on body weight. ISSN-backed loading and maintenance protocols with teaspoon conversions.

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Ideal Body Weight Calculator

Calculate your ideal body weight range based on height, gender, and frame size using multiple evidence-based formulas.

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Creatine Hydration Calculator

Calculate optimal water intake when using creatine supplements.

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BMI Calculator

Calculate your Body Mass Index and see your weight category based on WHO guidelines. Includes healthy weight range for your height.

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Calories Burned Calculator

Calculate calories burned during exercise and daily activities using MET values from the Compendium of Physical Activities for 30+ exercises.

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Body Fat Calculator

Calculate your body fat percentage using the U.S. Navy method. Simple neck, waist, and hip measurements give accurate body composition estimates.

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Body Roundness Index (BRI)

Calculate your Body Roundness Index using waist circumference and height. BRI measures central adiposity and predicts health risk more accurately than BMI.

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Metabolic Age Calculator

Calculate your metabolic age by comparing your BMR to population averages. Find out if your metabolism is younger or older than your actual age.

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Zone 2 Heart Rate Calculator

Calculate your Zone 2 heart rate training range for aerobic base building, fat burning, and mitochondrial health. Supports % Max HR, Karvonen, and Maffetone methods.

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Running Calorie Calculator

Calculate calories burned running by distance, pace, and terrain. Covers 5K through marathon with MET-based formula from the Compendium of Physical Activities.

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Running Pace Calculator

Calculate your running pace per mile or per km, predict finish time from pace, or estimate distance covered. Includes mile-by-mile splits and race time equivalents for 5K, 10K, half marathon, and marathon.

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Steps to Calories Calculator

Convert any step count to calories burned using your weight, stride length, and walking pace. Works with any fitness tracker. Includes steps-to-calories chart for 1,000–20,000 steps.

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Treadmill Calorie Calculator

Calculate calories burned on a treadmill by speed, incline, duration, and body weight. Uses the ACSM metabolic equation — the gold standard for treadmill calorie estimation. Includes incline comparison table.

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Cycling Calorie Calculator

Calculate calories burned cycling by intensity, duration, and body weight. Covers road cycling at every speed, mountain biking, and stationary bike. Uses the 2011 Compendium of Physical Activities MET values.

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