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Our most-used tools, each built on a clinically validated formula.
Evidence-based guides referenced from WHO, CDC, and NIH research.
Use the BMI and body fat calculators to understand your starting point before setting any goals.
Calculate your TDEE and set a calorie goal based on whether you want to lose fat, gain muscle, or maintain.
Split your calorie target into protein, carbs, and fat using the macro calculator for a complete nutrition plan.
Use the Save Results button to store your numbers in your browser. Revisit regularly to track changes over time.
All IndexBody calculators run in your browser. No personal data is sent to any server. Results are educational estimates — not medical advice. See disclaimer.
The search above covers all 31 calculators and 39 articles on IndexBody. You can search by topic, goal, or keyword:
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