What’s Your Health Age?
Estimate how your everyday habits compare with your chronological age.
Use free calculators to better understand your body, nutrition needs, fitness goals, and everyday wellness—all in one place.
See whether your lifestyle profile looks younger, about the same as, or older than your chronological age.
Choose a tool based on your goals. Each calculator is designed to be simple, educational, and easy to use.
Estimate how your everyday habits compare with your chronological age.
Calculate body mass index using your height and weight as a screening measure.
Estimate the calories your body may need based on age, size, and activity.
Estimate how many calories your body uses at rest each day.
Estimate total daily energy expenditure based on your activity level.
Estimate a starting point for daily protein, carbohydrate, and fat targets.
Estimate a practical daily protein range based on your body and goals.
Estimate a daily hydration starting point using body size and activity.
Estimate your likely fertile window using your cycle information.
Estimate the start of your next period using your average cycle length.
Estimate a due date from the first day of your last menstrual period.
View a general weight range based on height using standard BMI categories.
An educational lifestyle estimate—not a clinical biological-age test.
BMI is a screening measure and does not directly measure body fat.
Uses the Mifflin-St Jeor equation for adult women.
Estimate maintenance calories using age, height, weight, and activity.
Estimate your total daily energy expenditure.
Provides a simple starting split for protein, carbs, and fat.
Estimate a practical daily protein range based on body weight and goal.
A general hydration starting point; individual needs vary.
Calendar estimates are less reliable with irregular cycles and should not be used alone for contraception.
Estimate the next period using your average cycle length.
Estimates a due date using the first day of the last menstrual period.
Shows the weight range corresponding to adult BMI values 18.5–24.9.
Our Health Age calculator uses lifestyle information to create an educational estimate—not a medical diagnosis or laboratory measurement of biological age.
Example chronological age: 39
4 years younger — This example reflects several positive lifestyle habits.
Get a Custom Diet & Fitness Plan built around your goals, schedule, food preferences, fitness level, and available equipment.