Health & Fitness
BMI, BMR, calories, macros, body fat, and wellness tools.
55 tools available
Health & Fitness tools quantify the body’s key numbers: BMI, basal and total metabolic rate, daily calorie targets, macronutrient splits, body-fat estimates, ideal weight ranges, heart-rate zones, and hydration. They give you a clear, private baseline for setting goals without an account, an app, or sharing personal data anywhere.
Most of these build on energy balance. Your BMR is the energy you burn at rest; multiplying it by an activity factor gives TDEE, the calories you burn in a day. Eat below TDEE to lose weight, above to gain — the arithmetic the whole fitness industry rests on. BMI offers a quick weight-for-height screen (with well-known limits for muscular builds), while macro calculators split a calorie target into protein, carbs, and fat. Every result is an estimate to guide decisions, computed locally so your measurements stay yours.
BMI categories (WHO)
Body Mass Index = weight(kg) ÷ height(m)². A screening tool, not a diagnosis.
| Category | BMI range |
|---|---|
| Underweight | < 18.5 |
| Normal weight | 18.5 – 24.9 |
| Overweight | 25.0 – 29.9 |
| Obese | ≥ 30.0 |
BMI ignores muscle mass and fat distribution — pair it with body-fat and waist measures for a fuller picture.