Health & Body
Free Health & Body calculators with instant results, clear explanations and worked examples — no sign-up, available in 10 languages.
All Health & Body calculators
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- BMI Calculator
- BMR Calculator
- Body Fat Calculator
- Caffeine Half-Life Calculator
- Calorie Calculator
- Daily Water Intake Calculator
- Ideal Weight Calculator
- Mean Arterial Pressure (MAP) Calculator
- Ovulation Calculator
- Pregnancy Due Date Calculator
- Pregnancy Weight Gain Calculator
- Protein Target Calculator
- Sleep Debt Calculator
Estimate body measures like BMI, body-fat and ideal weight, daily calorie and hydration needs, heart-rate zones and pregnancy or ovulation dates. Use them to set a baseline or sanity-check a number before a workout or appointment — they are educational estimates, not a diagnosis, so confirm anything important with a clinician.