Free Health Calculators for BMI, Calories, Macros & More
Built for quick answers on mobile. Choose a calculator below. Results are estimates for informational purposes only — not medical advice.
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Weight & Fitness
BMI, calories (TDEE), BMR, macros, protein, water.
Pregnancy
Due date & ovulation calculators.
Health
Heart rate zones, sleep timing tools.
Planning
Calorie deficit & weight loss targets.
Popular calculators
How this site works
Each tool uses common reference formulas and provides an estimate. For best results, double-check your inputs and treat outputs as guidance for planning — not diagnosis.
- Use consistent units (cm/kg or ft/in/lb).
- Adjust based on progress (especially calories/macros).
- For medical concerns, talk to a licensed clinician.