Health Tools
Free online health calculators — BMI, BMR, calorie, and more. For informational use only.
12 tools available
Age Calculator
Calculate exact age in years, months, days, hours, and minutes from date of birth.
BMI Calculator
Calculate your Body Mass Index and find your healthy weight range.
BMR Calculator
Calculate your Basal Metabolic Rate — calories your body burns at rest.
Body Fat Calculator
Estimate body fat percentage using the US Navy circumference method.
Calorie Calculator
Calculate daily calorie needs for weight loss, maintenance, or muscle gain.
Due Date Calculator
Calculate pregnancy due date from last menstrual period or conception date.
Heart Rate Calculator
Calculate your maximum heart rate and target heart rate training zones.
Ideal Weight Calculator
Find your ideal body weight range using multiple medical formulas.
Running Pace Calculator
Calculate running pace, finish time, and distance for any running workout.
Sleep Calculator
Calculate optimal bedtime or wake-up time based on 90-minute sleep cycles.
TDEE Calculator
Calculate your Total Daily Energy Expenditure, BMR, and recommended macros.
Water Intake Calculator
Calculate your daily water intake needs based on weight and activity level.