Is 90 kg overweight for 170 cm?
Yes — 90 kg is 18.0 kg above the healthy upper limit for 170 cm.
At 90 kg (198 lbs) and 170 cm (5'7"), the BMI is 31.1 — obese class i.
For an adult who is 170 cm tall, the World Health Organization considers a weight between 53.5 and 72 kg to be healthy.
What the numbers mean for you
You are 17.7 kg (39 lbs) above the healthy upper limit and 3.3 kg (7 lbs) above the obesity threshold.
A first, clinically meaningful goal is a 10% reduction — about 9.0 kg (20 lbs), achievable in roughly 20 weeks at a 500 kcal daily deficit. This alone typically improves blood pressure, HbA1c, and lipid profile.
Timelines assume ~7,700 kcal per kg of body fat. Real progress varies with muscle mass, adherence, and medications.
What this means for your health
Cardiometabolic risk rises sharply in this band, but is far from deterministic — fitness, diet quality, and sleep substantially modify outcomes.
Waist matters more than the scale
Two people can share the same BMI and have very different metabolic risk. For that reason, waist circumference is now considered a stronger predictor of cardiometabolic disease than BMI alone.
- Waist-to-height rule: keep your waist under half your height — that means below 85 cm (33") at 170 cm.
- Absolute cutoff for most adults: waist under 94 cm (37") is associated with meaningfully lower risk of type 2 diabetes and cardiovascular disease.
- Higher-risk zone: waist above 102 cm (40") — this is where risk climbs sharply regardless of BMI.
Precise ±5 kg neighbours at this height
| Weight | Conversion | BMI | Category |
|---|---|---|---|
| 85 kg | 187 lbs | 29.4 | Overweight |
| 86 kg | 190 lbs | 29.8 | Overweight |
| 87 kg | 192 lbs | 30.1 | Obese Class I |
| 88 kg | 194 lbs | 30.4 | Obese Class I |
| 89 kg | 196 lbs | 30.8 | Obese Class I |
| 90 kg ← this page | 198 lbs | 31.1 | Obese Class I |
| 91 kg | 201 lbs | 31.5 | Obese Class I |
| 92 kg | 203 lbs | 31.8 | Obese Class I |
| 93 kg | 205 lbs | 32.2 | Obese Class I |
| 94 kg | 207 lbs | 32.5 | Obese Class I |
| 95 kg | 209 lbs | 32.9 | Obese Class I |
Practical next steps
- Consult a GP for a full metabolic assessment (blood pressure, HbA1c, lipids).
- Set an initial target of 5–10% body-weight loss — clinically meaningful and achievable.
- Combine dietary change, daily movement, and sleep optimisation.
- Discuss whether structured programmes or medication are appropriate.
Frequently asked questions
Is 90 kg overweight for 170 cm?
90 kg at 170 cm gives a BMI of 31.1, which is obese class i. The WHO healthy range for 170 cm is 53.5–72 kg.
What is the healthy weight for 170 cm?
53.5–72 kg (118–159 lbs).
How much should I lose or gain?
To reach the healthy upper limit, the difference is 18.0 kg.