BMI calculator
Enter your height and weight. You get your BMI, its category, and the weight range for your height.
Updated October 2026
Your BMI
24.2
Healthy weight
At your height, a BMI of 18.5 to 24.9 is 53.5 to 72.1 kg.
BMI categories for adults
| BMI | Category |
|---|---|
| Under 18.5 | Underweight |
| 18.5 to 24.9 | Healthy weight |
| 25 to 29.9 | Overweight |
| 30 to 34.9 | Obesity, class I |
| 35 to 39.9 | Obesity, class II |
| 40 and over | Obesity, class III |
Healthy weight range by height
The weights that give a BMI of 18.5 to 24.9 at each height.
| Height | Healthy weight (kg) | Healthy weight (lb) |
|---|---|---|
| 150 cm (4 ft 11 in) | 41.6 to 56.1 | 92 to 124 |
| 155 cm (5 ft 1 in) | 44.4 to 60.0 | 98 to 132 |
| 160 cm (5 ft 3 in) | 47.4 to 63.9 | 104 to 141 |
| 165 cm (5 ft 5 in) | 50.4 to 68.0 | 111 to 150 |
| 170 cm (5 ft 7 in) | 53.5 to 72.1 | 118 to 159 |
| 175 cm (5 ft 9 in) | 56.7 to 76.5 | 125 to 169 |
| 180 cm (5 ft 11 in) | 59.9 to 80.9 | 132 to 178 |
| 185 cm (6 ft 1 in) | 63.3 to 85.5 | 140 to 188 |
| 190 cm (6 ft 3 in) | 66.8 to 90.2 | 147 to 199 |
BMI by height and weight
| Weight | 155 cm | 165 cm | 175 cm | 185 cm |
|---|---|---|---|---|
| 50 kg | 20.8 | 18.4 | 16.3 | 14.6 |
| 60 kg | 25.0 | 22.0 | 19.6 | 17.5 |
| 70 kg | 29.1 | 25.7 | 22.9 | 20.5 |
| 80 kg | 33.3 | 29.4 | 26.1 | 23.4 |
| 90 kg | 37.5 | 33.1 | 29.4 | 26.3 |
| 100 kg | 41.6 | 36.7 | 32.7 | 29.2 |
| 110 kg | 45.8 | 40.4 | 35.9 | 32.1 |
BMI is a general screen and not medical advice. Talk to a doctor about your weight, particularly if you are pregnant, a child, or very muscular.
BMI chart for your height
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Questions
How do you calculate BMI?
Divide your weight in kilograms by your height in metres, squared. A person who is 70 kg and 1.70 m tall has a BMI of 70 ÷ (1.70 × 1.70) = 24.2. In pounds and inches, multiply weight by 703 and divide by height squared.
What is a healthy BMI?
For adults, the World Health Organization calls a BMI of 18.5 to 24.9 a healthy weight, 25 to 29.9 overweight, and 30 or more obese. Below 18.5 is underweight.
What is a healthy weight for my height?
It is the weight range that gives a BMI of 18.5 to 24.9. For 170 cm (5 ft 7 in) that is about 53.5 to 72 kg (118 to 159 lb). The calculator and the table below show it for any height.
Is BMI accurate?
BMI is a quick screen, not a diagnosis. It does not tell muscle from fat, so a muscular person can read as overweight. It also does not show where fat sits. Waist size and a doctor's view give a fuller picture.
Is BMI the same for men and women, and for all ages?
The adult categories are the same for men and women. For children and teenagers, BMI is read against growth charts for their age and sex, so this calculator is for adults. Some health bodies suggest lower cut-offs for people of Asian descent.
What BMI is underweight?
A BMI below 18.5 is classed as underweight for adults. If that is you and it is not your usual weight, talk to a doctor.
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