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Free Health & Fitness Calculators

Simplify your wellness journey with our 100% free tools. Get instant, accurate calculations for your Sleep, Nutrition, and Strength Training to reach your fitness goals faster.

Standard Formulas No Sign-up Required Updated July 2026

Category Updated: May 4, 2026

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Strength & Body

1RM Calculator

Estimate your one-rep max for bench press, squat, and deadlift using proven strength formulas.

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Army Body Fat Calculator

Calculate your U.S. Army body fat percentage using the new 1-site test or legacy multi-site method.

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Nutrition & Diet

Indian Food Calorie

Quickly calculate calories in 100+ Indian dishes with familiar serving sizes and portions.

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Sleep & Recovery

REM Sleep Cycle

Calculate your ideal REM sleep cycles and find the best time to wake up feeling refreshed.

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Frequently Asked Questions

Are these health calculations medically accurate?

Our calculators use standard formulas (like those used by fitness professionals and the US Army) to provide estimations. However, they are not a substitute for professional medical advice.

Do you save my physical or health data?

Absolutely not. All health data you input (like weight, age, or sleep times) is processed locally in your browser. We do not store or track any of your personal health metrics.

How is the 1RM calculated?

The 1 Rep Max calculator uses highly regarded strength formulas (such as Epley and Brzycki) to estimate your maximum lifting capacity safely without having to actually attempt a 1-rep max.

Can I request a specific fitness tool?

Yes! We are constantly adding new tools. If you need a Macro calculator, BMI tool, or anything else, please contact us and we will build it.

More Fitness Tools Coming Soon!

Have a suggestion for a new diet or gym calculator? Let us know!

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Cite this content, page or calculator as:

Himanshu Grewal, "Health Fitness" at https://freeaicalculator.com/health-fitness/ from Free AI Calculator, https://freeaicalculator.com - Online Calculators, Generators & Web Tools.