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Health & Fitness

Track BMI, calorie needs, and body composition with evidence-based formulas.

12 Calculators

Browse Health & Fitness

BMI Calculator

Calculate your Body Mass Index

Calorie Calculator

Estimate your daily calorie needs

Body Fat Calculator

Estimate your body fat percentage

BMR Calculator

Calculate your Basal Metabolic Rate

Ideal Weight Calculator

Estimate your ideal body weight

Water Intake Calculator

Estimate your daily water needs

Waist-to-Hip Ratio Calculator

Calculate your waist-to-hip ratio

Heart Rate Zone Calculator

Calculate your target heart rate zones

Macros Calculator

Calculate your daily macronutrient targets

Calorie Deficit Calculator

Calculate your calorie deficit for weight loss

VO2 Max Calculator

Estimate your VO2 max from run time

One Rep Max Calculator

Estimate your one-rep max lift

FAQ

Frequently Asked Questions

Are all Health & Fitness calculators free?

Yes, every calculator on this site is completely free to use with no sign-up required.

How accurate are these calculators?

Each calculator uses standard, widely-accepted formulas for its category. Results are for informational purposes - verify with a professional for critical decisions.

Do I need to install anything?

No - every calculator runs directly in your browser. Nothing to download or install.

Can I use these calculators on mobile?

Yes, every calculator is fully responsive and works on phones, tablets, and desktops.

Is my data saved when I use a Health & Fitness calculator?

No - all calculations happen in your browser and nothing is stored or transmitted.

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