Senior BMI Calculator
Calculate BMI for adults 65+ with age-adjusted healthy ranges.
Standard BMI charts don't apply to seniors — this calculator uses the recommended 22-27 range.
Your data stays in your browser. We do not store, collect, or transmit any information you enter.
Senior BMI Result
BMI for Seniors (65+) uses the same formula as standard BMI but applies age-adjusted healthy ranges.
Imperial: BMI = (Weight in lbs × 703) / (Height in inches)²
Metric: BMI = Weight in kg / (Height in m)²
Age-adjusted BMI ranges for seniors:
- Below 22 — Underweight (increased health risk)
- 22 – 27 — Healthy range for seniors
- 27 – 30 — Slightly overweight
- Above 30 — Obese
Why seniors have a different range:
- Research shows slightly higher BMI is protective in older adults
- Being underweight increases risk of falls, fractures, and infections
- The standard 18.5–24.9 range was developed for younger adults
- A BMI of 23–25 is associated with the lowest mortality in adults over 65