Healthy BMI for seniors and older adults

This calculator works out your body mass index and interprets it using the reference values for people aged 65 and over. For people under 65, the BMI calculator, which uses the reference values for adults, is more suitable. BMI values are interpreted in the same way for women and men.

Why do older adults have different reference values?

The reference values for BMI are based on, among other things, years of life lived, all-cause mortality and deaths caused by various diseases. In adults (aged 18–64), a BMI of 18.5–24.9 has been set as the recommended reference range based on research, and values below or above this range are associated with fewer years of life.

Studies of older adults have shown that in people over 65, the effects of a higher BMI are not as great as in younger people, and in fact slightly higher values are associated with more years of life. One explanatory factor is the loss of muscle mass and decline in muscle strength that come with age, which impair functional capacity and can make falls more likely. A slightly higher BMI may indicate greater muscle mass and energy reserves, which are useful, for example, during illness. In addition, low body weight in older adults is often linked to illness or frailty, which shows up in studies as higher mortality. Based on research, a BMI of 23–29 is commonly recommended for people over 65, but weight loss is not necessarily recommended even at slightly higher values.

How should a 60-year-old interpret their BMI?

The reference values for BMI change at the age of 65. However, biological age can vary from person to person. For people under 65, BMI is interpreted on the adult scale, where the recommended range is 18.5–24.9. If you are under 65, calculate your BMI with the BMI calculator.

Exercise and muscle fitness

Older adults should also aim for 2.5 hours of brisk exercise or 1 hour and 15 minutes of vigorous exercise per week. Improving or maintaining muscle fitness is particularly important for older adults. Older adults should do muscle-strengthening activities at least twice a week and activities that emphasize functional balance and strength training on at least three days a week. To support exercise and strength training, it is important to eat enough protein and get enough sleep. You can explore the heart rate zones for health-enhancing physical activity with the Karvonen formula calculator.

Measure your waist circumference too

Measuring your waist circumference helps in assessing your health, as it gives a better indication than BMI of central obesity and visceral fat, that is, fat that builds up in the abdominal cavity, which is particularly harmful to health. According to research, people with a smaller waist live longer on average, even if their BMI is the same.

Published: 4.11.2026

Updated: 4.11.2026

The text is a translation from the original Finnish-language text.

Author of the original text

Lassi Honkanen
physiotherapist

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