🧮 Everyday Calculators

Eight quick health and fitness calculators for everyday questions. Every one runs entirely in your browser — nothing you enter is uploaded.

⚖️ BMI Calculator

Body mass index from height and weight, metric or imperial.

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🔥 BMR Calculator

Basal metabolic rate using the Mifflin-St Jeor equation.

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🍽️ TDEE Calculator

Total daily energy expenditure and calorie targets.

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💧 Water Intake Calculator

Daily hydration target from weight, activity and climate.

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❤️ Heart Rate Zone Calculator

Target training zones from your age and resting heart rate.

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📏 Body Fat Percentage Calculator

Estimate body fat using the U.S. Navy circumference method.

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⚖️ Ideal Weight Calculator

Compare four classic ideal body weight formulas.

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📐 Waist-to-Hip Ratio Calculator

WHR and associated health risk category.

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