BMI Calculator for Adults 55+
See your body mass index and a healthy weight range in seconds.
Fill in the fields above to see your result.
For general guidance only — not medical advice. Please check with your doctor before starting any new exercise or diet.
About the BMI Calculator
BMI (body mass index) compares your weight to your height to give a single, rough number. It’s a useful starting point, not a full picture of health.
After 55, muscle naturally declines, so BMI can misjudge people who are very muscular or who have lost muscle. Treat it as a gentle guide alongside how you feel and move.
Frequently asked questions
What is a healthy BMI?
A BMI of 18.5–24.9 is generally considered the healthy range. 25–29.9 is “overweight” and 30+ is “obese”, but these are broad guides.
Is BMI accurate for older adults?
It’s a rough guide. Because muscle mass changes with age, waist measurements and how you feel day to day matter too.
Should I aim for a “perfect” BMI?
No. Small, steady change is what lasts. Pick a comfortable, realistic target and check with your doctor.
Related calculators
Want a plan built around you?
Take the free 2-minute quiz and get gentle chair sessions matched to your body and pace.
Take the 2-minute quiz