Healthy BMI ranges, healthy weight by height, average BMI at this age, and what the numbers actually mean for women after 65.
The table below shows the healthy weight range (BMI 18.5 to 24.9) for women at common heights. Use this to quickly see where your target weight sits.
| Height | Healthy Weight Range | Overweight starts at |
|---|---|---|
| 5'0" / 152 cm | 43–57 kg / 95–126 lb | 58 kg / 128 lb |
| 5'2" / 157 cm | 46–61 kg / 101–135 lb | 62 kg / 136 lb |
| 5'4" / 163 cm | 49–66 kg / 108–146 lb | 67 kg / 147 lb |
| 5'6" / 168 cm | 52–70 kg / 115–155 lb | 71 kg / 156 lb |
| 5'8" / 173 cm | 55–74 kg / 122–164 lb | 75 kg / 165 lb |
| 5'10" / 178 cm | 59–79 kg / 130–174 lb | 80 kg / 175 lb |
For your exact BMI use our BMI Calculator — enter your height and weight for an instant result.
The average BMI for women in the 65 to 74 age group is approximately 28.2, which sits in the overweight category. BMI tends to decrease slightly after 75 as weight naturally drops with age, but this is not always a sign of better health — it often reflects muscle loss rather than improved body composition.
| Age group (women) | Average BMI | Category |
|---|---|---|
| 65–69 | ~28.5 | Overweight |
| 70–74 | ~27.9 | Overweight |
| 75–79 | ~27.1 | Overweight |
| 80+ | ~25.8 | Overweight / upper normal |
💡 Average BMI is not the same as healthy BMI. Most women over 65 carry more weight than is associated with optimal health outcomes. Average is a population statistic — not a personal target.
The official healthy BMI range of 18.5 to 24.9 does not change by age in standard guidelines. However, research on older adults shows a more nuanced picture.
Some large studies have found that women over 70 with a BMI between 25 and 27 have slightly lower mortality risk than those at the very low end of the normal range. This is sometimes called the "obesity paradox" — a mild buffer of weight may be protective in older age, possibly because it provides reserves during illness or hospitalisation.
What is consistently harmful at any age is a BMI above 30, which is associated with significantly higher risk of cardiovascular disease, type 2 diabetes, and mobility problems. Being underweight (below 18.5) is also a serious risk in women over 65, associated with frailty, falls, and poor recovery from illness.
BMI becomes a less precise health indicator after 65 for a specific reason: muscle mass naturally decreases with age (a process called sarcopenia). This means two women with identical BMIs at 65 and at 35 can have very different body compositions. The 65-year-old may have significantly more body fat and less muscle — which is associated with higher health risk — despite the same BMI number.
For this reason, waist circumference is a particularly useful additional measure for older women. A waist above 80 cm (31.5 inches) indicates elevated metabolic risk regardless of BMI, and above 88 cm (35 inches) indicates high risk.
For women of Asian descent, the standard BMI cutoffs underestimate health risk at every age, including over 65. Asian women develop cardiovascular and metabolic risk at lower BMI levels than Western populations. The recommended thresholds are:
| Category | Standard BMI | Asian BMI |
|---|---|---|
| Normal weight | 18.5 – 24.9 | 18.5 – 22.9 |
| Overweight | 25.0 – 29.9 | 23.0 – 27.4 |
| Obese | 30.0+ | 27.5+ |
Use our Asian BMI Calculator to check your result against these thresholds.
For women over 65, the health goals around weight shift somewhat compared to earlier decades. The most important priorities are:
One of the most important intersections of BMI and health for women over 65 is bone density. Women lose bone mass rapidly in the years following menopause, and being underweight (BMI below 20) significantly increases the risk of osteoporosis and fragility fractures. Conversely, a modest amount of body fat may be protective — adipose tissue produces oestrogen, which helps maintain bone density post-menopause.
This is one reason some researchers argue that a BMI of 22–27 may be more appropriate as a healthy target for women over 65, rather than the standard 18.5–24.9. Hip fractures in older women with low BMI are associated with significantly higher mortality — up to 20–30% one-year mortality in some populations.
💡 For women over 65, being too thin carries as much health risk as being too heavy. A BMI below 20 is associated with increased fracture risk, impaired immune function, and reduced recovery capacity during illness.
⚠️ BMI is a screening tool, not a clinical diagnosis. Women over 65 with concerns about weight, bone health, or cardiovascular risk should discuss their individual situation with a doctor.
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