Health & Fitness
Turn fitness goals into measurable daily actions.
Browse all 18 calculators
Top picks
Curated TDEE
Best for: Daily calorie target baseline
Calculate your TDEE using Mifflin-St Jeor or Harris-Benedict formulas. See calorie needs by activity level.
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Calorie Deficit
Best for: Fat-loss calorie planning
Calculate your daily calorie target for weight loss or muscle gain. See projected weight over time, macro split, and safety warnings.
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Protein Intake
Best for: Daily muscle-focused nutrition target
Calculate your daily protein target based on body weight, fitness goal, and age. Evidence-based ranges from NHS, ISSN, and sports science research.
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More calculators
Looking for experimental tools? Browse beta calculators.