Free Health & Fitness Calculators

Instant, accurate health calculations with metric and imperial support. No account needed — your data never leaves your browser.

• BMI Calculator — Check your Body Mass Index using metric or imperial units.
• Daily Calorie Needs (BMR/TDEE) — Estimate daily calories burned at rest and total daily energy expenditure.
• Body Fat % Calculator — Estimate body fat percentage using the Navy circumference method.
• Ideal Weight Calculator — Compare Devine, Robinson, and Miller formulas for healthy weight ranges.
• Macro Split Calculator — Get daily grams of protein, carbs, and fat based on your calorie target and goal.