BMI for 140 cm and 40 kg
A person 140 cm (4'7") tall weighing 40 kg (88 lbs) has a BMI of 20.4 — classified as Normal. The healthy weight range for this height is 36.3–48.8 kg.
Your BMI score
Quick health screening — not a diagnosis
Your BMI falls within the healthy range for most adults.
What this means
BMI is a quick screening number based only on height and weight. It doesn't distinguish muscle from fat, and shouldn't replace a clinical assessment.
- 18.5–24.9 generally lowest health risk
- 25–29.9 elevated metabolic risk
- 30+ higher long-term risk
BMI range
WHO adult classification
- Severe thinness< 16
- Underweight16 – 18.5
- YouNormal18.5 – 24.9
- Overweight25 – 29.9
- Obese I30 – 34.9
- Obese II35 – 39.9
- Obese III≥ 40
What does this BMI mean?
Lower end of healthy range · BMI 20.4 · Normal
20.4 is on the lighter side of healthy. For 140 cm, this means weight is closer to the lower bound (36.3 kg) than the upper bound (48.8 kg).
Statistically, BMIs in the 18.5–24.9 range are associated with the lowest weight-related health risk for most adults. That doesn't make it a perfect score — body composition, activity, and metabolic markers all matter — but it's a solid baseline.
Treat this as a starting point, not a verdict. BMI ignores muscle mass, body shape, and individual context — it's a quick number for a population, not a personal health score.
For someone 140 cm tall, weights between 36.3 kg and 48.8 kg fall in the BMI 18.5–24.9 healthy range — roughly 80–108 lbs.
How far from the healthy range?
40 kg sits inside the standard healthy weight range (36.3–48.8 kg) for 140 cm. There's about 8.8 kg of headroom before the BMI 25 line and 3.7 kg of buffer above the BMI 18.5 line.
Target BMI milestones
Weights that would land at common BMI thresholds for 140 cm.
| Milestone | Target weight | vs current |
|---|---|---|
| BMI 18.5 (lower healthy bound) | 36.3 kg(80 lbs) | Lose ~3.7 kg |
| BMI 22 (mid-healthy) | 43.1 kg(95 lbs) | Gain ~3.1 kg |
| BMI 25 (upper healthy bound) | 49.0 kg(108 lbs) | Gain ~9.0 kg |
Why BMI isn't the whole story
- Muscle vs fat: BMI treats a kilogram of muscle the same as a kilogram of fat. Strength athletes and very muscular builds can land in the overweight band while having low body fat.
- Body shape matters: Two people at the same BMI can carry weight very differently. Waist circumference and waist-to-height ratio capture risk that BMI misses.
- Age, sex, ethnicity: The 18.5–24.9 window is a single global average. Cutoffs adjusted for ethnicity and age can shift the interpretation, especially at the edges of the band.
- Still useful: BMI remains widely used because it's cheap, fast, and roughly predictive at population scale. Treat it as a self-check signal, not a diagnosis.
Nearby BMI combinations
Related
Common questions
Last updated: 2026