Free Online Health & Fitness Calculators
BMI, calories, heart rate, sleep and workout calculations
Tools in Health & Fitness
Compare all 5 tools by their catalog descriptions and open the one you need.
- Body Mass IndexBMI and an indicative adult weight range
- Water IntakeEstimate a starting water-intake range from body weight
- Sleep CalculatorEstimate sleep times from cycle assumptions
- Heart Rate ZonesEstimate age-based exercise heart-rate ranges
- Pregnancy CalculatorEstimate due date and gestational age from the last period
About Health & Fitness
Free online calculators for health and fitness: BMI, calorie needs, ideal weight, heart rate zones, sleep calculator and water intake. Calculations based on scientifically proven formulas for health monitoring.
What these tools can do
- BMI calculator (Body Mass Index)
- Calorie needs: BMR/TDEE
- Ideal weight by multiple formulas
- Training heart rate zones
- Sleep calculator by phases
- Daily water intake
- Body fat percentage
- Pregnancy calculator
When to use them
Health calculators are used by health-conscious individuals, athletes, fitness trainers and doctors. Results are for informational purposes and do not replace professional medical advice.