BMI for 173 cm and 135 kg
A person 173 cm (5'8") tall weighing 135 kg (298 lbs) has a BMI of 45.1 — classified as Obese. The healthy weight range for this height is 55.4–74.5 kg.
Your BMI score
Quick health screening — not a diagnosis
Your BMI falls within class III obesity, with very high long-term health risk.
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
- Normal18.5 – 24.9
- Overweight25 – 29.9
- Obese I30 – 34.9
- Obese II35 – 39.9
- YouObese III≥ 40
What does this BMI mean?
Obesity class III · BMI 45.1 · Obese
A BMI of 45.1 is in obesity class III (40+). At 173 cm, body weight sits roughly 60.5 kg — about 81% — above the upper healthy bound of 74.5 kg.
This BMI band carries the strongest population-level health signal, but it's not deterministic. A clinician can interpret it alongside blood pressure, lipids, glucose, and body composition for a meaningful picture.
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 173 cm tall, weights between 55.4 kg and 74.5 kg fall in the BMI 18.5–24.9 healthy range — roughly 122–164 lbs.
How far from the healthy range?
Target BMI milestones
Weights that would land at common BMI thresholds for 173 cm.
| Milestone | Target weight | vs current |
|---|---|---|
| BMI 40 (class III threshold) | 119.7 kg(264 lbs) | Lose ~15.3 kg |
| BMI 35 (class II threshold) | 104.8 kg(231 lbs) | Lose ~30.2 kg |
| BMI 30 (obesity threshold) | 89.8 kg(198 lbs) | Lose ~45.2 kg |
| BMI 25 (healthy range) | 74.8 kg(165 lbs) | Lose ~60.2 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