Free · Accurate · Instant

Know Your Body.
Track Your Health.

FitMetrics gives you essential health calculators built on established formulas used by doctors, dietitians, and fitness professionals worldwide.

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13Calculators
100%Free
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Health metrics dashboard

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Select any calculator to get your result instantly

BMI CalculatorBMI Calculator

Check if your weight is in a healthy range using the WHO international standard classification.

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BMR CalculatorBMR Calculator

Discover the calories your body burns at complete rest — the foundation of all calorie planning.

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IBW CalculatorIBW Calculator

Find the medically recommended weight for your height using the Devine formula.

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Body Fat CalculatorBody Fat Calculator

Estimate your body fat percentage using simple measurements — no equipment needed.

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TDEE CalculatorTDEE Calculator

Calculate your total daily calorie burn based on your activity level to manage weight precisely.

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Calorie Intake CalculatorCalorie Intake Calculator

Get your personalised daily calorie target for weight loss, maintenance, or gain — with macros included.

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Carbohydrate CalculatorCarbohydrate Calculator

Get a daily carbohydrate target in grams based on calorie needs, activity, and WHO-aligned carb ratios.

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Weight Gain CalculatorWeight Gain Calculator

Set your daily calorie surplus, estimate timeline to target weight, and get practical macros for healthy gain.

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Weight Loss CalculatorWeight Loss Calculator

Set your daily calorie deficit, estimate timeline to goal weight, and get practical macro targets for fat loss.

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Calories Burned CalculatorCalories Burned Calculator

Estimate calories burned from activity type, duration, and body weight using MET-based open standards.

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Body Type CalculatorBody Type Calculator

Find your body shape and WHO-classified waist-to-hip ratio to understand your cardiovascular risk profile.

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Protein Intake CalculatorProtein Intake Calculator

Get a daily protein target in grams from your body weight and goal, based on WHO/FAO/UNU safe intake levels.

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Water Intake CalculatorWater Intake Calculator

Get your personalised daily water target in litres and ml based on body weight and activity level.

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Why Use FitMetrics?

Built for accuracy, simplicity, and your privacy

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Established Formulas

Every calculator uses well-known formulas widely applied in clinical and fitness practice.

Instant Results

Get your health metrics in seconds with no sign-up or download required.

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Track Progress

Save your results and monitor how your metrics change over time.

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Private & Secure

Your data stays on your device. We never sell or share personal information.