BMI for 80 kg and 170 cm
Instant answer: A person who weighs 80 kg (176 lbs) and is 170 cm (5'7") tall has a BMI of 27.7, classified as overweight.
At 170 cm, the BMI-based healthy weight range spans 53.5 kg to 72 kg, with the midpoint considered the most statistically protective.
What the numbers mean for you
You are 7.7 kg (17 lbs) above the healthy upper limit (BMI 25 = 72.3 kg (159 lbs)). At a modest 500 kcal daily deficit (~0.45 kg/week), reaching the healthy range takes about 17 weeks.
You have 6.7 kg (15 lbs) of buffer before crossing into the obese range (BMI 30 = 86.7 kg (191 lbs)). A 5–10% weight reduction (4.0 kg (9 lbs) to 8.0 kg (18 lbs)) is clinically meaningful even without reaching a "normal" BMI.
Timelines assume ~7,700 kcal per kg of body fat. Real progress varies with muscle mass, adherence, and medications.
What does a BMI of 27.7 mean?
Population data show that physically active people in this BMI band often have better cardiovascular outcomes than sedentary people inside the 'normal' range.
BMI is a screening tool, not a diagnosis. Two people at 80 kg and 170 cm can have very different body compositions and very different health profiles. Use BMI alongside waist circumference, fitness level, and routine bloodwork.
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.
Healthy weight range for 170 cm
The BMI-based healthy weight range for 170 cm tall adults is 53.5–72 kg (118–159 lbs).
| Weight | In lbs | BMI | Category |
|---|---|---|---|
| 65 kg | 143 lbs | 22.5 | Normal weight |
| 70 kg | 154 lbs | 24.2 | Normal weight |
| 75 kg | 165 lbs | 26.0 | Overweight |
| 80 kg (this page) | 176 lbs | 27.7 | Overweight |
| 85 kg | 187 lbs | 29.4 | Overweight |
| 90 kg | 198 lbs | 31.1 | Obese Class I |
| 95 kg | 209 lbs | 32.9 | Obese Class I |
Precise ±5 kg neighbours at this height
| Weight | Conversion | BMI | Category |
|---|---|---|---|
| 75 kg | 165 lbs | 26.0 | Overweight |
| 76 kg | 168 lbs | 26.3 | Overweight |
| 77 kg | 170 lbs | 26.6 | Overweight |
| 78 kg | 172 lbs | 27.0 | Overweight |
| 79 kg | 174 lbs | 27.3 | Overweight |
| 80 kg ← this page | 176 lbs | 27.7 | Overweight |
| 81 kg | 179 lbs | 28.0 | Overweight |
| 82 kg | 181 lbs | 28.4 | Overweight |
| 83 kg | 183 lbs | 28.7 | Overweight |
| 84 kg | 185 lbs | 29.1 | Overweight |
| 85 kg | 187 lbs | 29.4 | Overweight |
Practical next steps
- Aim for 5–10% body-weight reduction as the first goal — this alone improves most metabolic markers.
- Walk 30+ minutes daily and add two resistance sessions weekly.
- Audit liquid calories; they are the easiest to cut.
- Discuss screening for blood pressure, glucose, and lipids with your GP.
Frequently asked questions
What is the BMI for 80 kg and 170 cm?
Using the formula BMI = weight (kg) ÷ height (m)², a person who weighs 80 kg and is 170 cm tall has a BMI of 27.7. This places them in the overweight category as defined by the World Health Organization.
Is 80 kg a healthy weight at 170 cm?
The healthy weight range for 170 cm is 53.5–72 kg, corresponding to a BMI of 18.5–24.9. 80 kg gives a BMI of 27.7, which is overweight.
How was this BMI calculated?
BMI = 80 ÷ (1.70 × 1.70) = 80 ÷ 2.8900 = 27.7.
What should I do if my BMI is 27.7?
Aim for 5–10% body-weight reduction as the first goal — this alone improves most metabolic markers. Walk 30+ minutes daily and add two resistance sessions weekly.