🧮 Fitness Calculators

BMI BMR BF% HR 1RM Muscle Protein Potato Run
📊

BMI Calculator

Calculate your Body Mass Index with visual range indicators

Available
🔥

BMR Calculator

Calculate your Basal Metabolic Rate using all three major formulas with instant comparison

Available
📏

Body Fat Calculator

Calculate body fat percentage using Navy circumference method.

Available
❤️

Heart Rate Zones

Calculate your heart rate training zones for optimal workout intensity

Available
💪

One Rep Max

Estimate your maximum lift using Epley, Brzycki, and Lombardi formulas

Available
🏋️

Muscle Potential

Casey Butt's formulas for maximum muscle potential

Available
🥚

Protein Calculator

Daily protein guidance: RDA, seniors, pregnancy, bodybuilding, longevity.

Available
🥔

Potato Hack

Calculate calorie deficit on a potato-only diet with resistant starch effects

Available
🏃‍♂️

Running Pace Calculator

Calculate race finish times for 5K, 10K, half marathon, and full marathon based on your pace

Available

Medical Disclaimer: These calculators are for educational purposes only and should not replace professional medical advice.

© 2025 Potato Hack Fitness Calculators. Learn more about the Potato Hack.

Privacy Policy: This site does not track users or display ads. No pop-up windows either.

The code for this site is freely available on GitHub. Use however you like.