Health Calculators
How to Use These Health Calculators
These calculators use widely accepted equations - such as the Mifflin-St Jeor formula for BMR and the US Navy method for body fat - to estimate your metrics based on your weight, height, age and activity. Results are estimates, not medical advice.
- Calories - daily intake, BMR and TDEE estimates
- Body - BMI, body fat percentage and age
- Nutrition - protein, macros and water intake targets
Water Intake Calculator
Find out how much water you should drink each day based on your weight and activity.
Protein Intake Calculator
Calculate how much protein you need per day for your weight and fitness goal.
TDEE Calculator
Calculate your total daily energy expenditure and maintenance calories.
Body Fat Calculator
Estimate your body fat percentage using the US Navy circumference method.
Macro Calculator
Calculate your daily protein, carb and fat targets for your fitness goal.
Age Calculator
Calculate your exact age in years, months and days from your date of birth.
BMR Calculator
Calculate your basal metabolic rate using the Mifflin-St Jeor equation.
Calorie Calculator
Estimate your daily calorie needs to maintain, lose or gain weight.
Calorie Deficit Calculator
Find your daily calorie target and expected weight loss pace for a deficit.
Steps to Miles Calculator
Convert your step count into miles or kilometers based on your stride length.
Heart Rate Zone Calculator
Find your training heart rate zones for your age and fitness level.
Waist to Hip Ratio Calculator
Calculate your waist-to-hip ratio and see what it says about your health.
Due Date Calculator
Estimate your baby due date and current pregnancy week from your last period.
Sleep Calculator
Find the best bedtime for your wake-up time based on 90-minute sleep cycles.
Ovulation Calculator
Estimate your next period, ovulation day and fertile window from your last period.