Age-adjusted healthy weight range for 45-year-old womans — 48–65 kg (106–143 lbs).
For a 45-year-old woman of average height (161.3 cm), the healthy weight range is 48–65 kg (106–143 lbs), based on an age-adjusted BMI of 18.5–24.9. The midpoint — approximately 56 kg (124 lbs) — is a practical target for most people.
| Category | BMI | Weight (kg) | Weight (lbs) |
|---|---|---|---|
| 🔵 Underweight | < 18.5 | < 48 kg | < 106 lbs |
| ✅ Healthy | 18.5–24.9 | 48–65 kg | 106–143 lbs |
| ⚠️ Overweight | 24.9–30.0 | 65–78 kg | 143–172 lbs |
| 🔴 Obese | ≥ 30.0 | > 78 kg | > 172 lbs |
The standard BMI range (18.5–24.9) applies through your late forties. For adults 50 and older, research supports a slightly wider healthy range (20–26.5 BMI), and for those 65+, a range of 21–27 is associated with the best health outcomes — accounting for protective effects of modest extra weight against osteoporosis and illness recovery.
| Age group | Recommended BMI range | Weight range at 161 cm |
|---|---|---|
| 18–49 | 18.5–24.9 | 48–65 kg |
| 50–64 | 20.0–26.5 | 52–69 kg |
| 65+ | 21.0–27.0 | 55–70 kg |
A sustainable calorie deficit of 300–500 kcal/day produces 0.3–0.5 kg of fat loss per week without excessive muscle loss. Pair this with resistance training 2–3 times per week and protein intake of at least 60–74 g/day.
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