56.7-71.7 kg
Free health calculator
BMI & Height Weight Calculator
Calculate adult BMI, compare current weight to the healthy BMI range, and review NIH BMI table categories by height.
- US and metric units
- BMI category
- Healthy weight range
- NIH table reference
BMI result
Body mass index
Overweight
25.1
- Healthy BMI range
- 18.5 to 24.9
- Healthy weight range
- 128.9 lb to 173.6 lb
- Entered height
- 5 ft 10.0 in
- Entered weight
- 175.0 lb
- Category note
- BMI is above the standard healthy range.
- Comparison to healthy range
- About 21.1 lb above the high end of the healthy BMI range.
NIH BMI table reference
The NIH table lists body-weight ranges by whole-number BMI columns. It is not sex-specific.
74.4-86.2 kg
89.4-116.1 kg
118.8-160.6 kg
- Chart height used
- 5 ft 8.0 in
- Chart interpretation
- Between chart heights; estimated between the nearest listed rows.
Estimate only. This calculator is not medical advice.
How to use this BMI calculator
Choose US or metric units, then enter height and weight. The calculator shows body mass index, a standard adult BMI category, the healthy BMI weight range for the entered height, and NIH BMI table ranges for the nearest listed height.
How BMI is calculated
BMI compares weight to height. In metric units, BMI equals kilograms divided by height in meters squared. In US units, BMI equals pounds divided by inches squared, multiplied by 703.
What BMI categories mean
Common adult BMI categories are underweight below 18.5, healthy weight from 18.5 to 24.9, overweight from 25 to 29.9, and obesity at 30 or higher.
Adult BMI category reference
BMI categories are screening ranges, not a full health assessment. They can be useful for a quick comparison, but they should be interpreted with age, activity level, medical history, and body composition in mind.
| BMI range | Adult category | Important context |
|---|---|---|
| Below 18.5 | Underweight | May need clinical context, especially if weight loss was unplanned. |
| 18.5 to 24.9 | Healthy weight | Still does not measure diet, fitness, blood pressure, or body fat directly. |
| 25.0 to 29.9 | Overweight | May overstate risk for muscular people and understate risk for others. |
| 30.0 or higher | Obesity | Useful as a screening signal, but not a diagnosis by itself. |
How the NIH BMI table relates to the calculator
The NIH BMI table organizes body-weight ranges by whole-number BMI columns rather than by sex or age. Its healthy weight range maps to BMI 19 to 24, overweight maps to BMI 25 to 29, obese maps to BMI 30 to 39, and extreme obesity maps to BMI 40 to 54. The calculator still uses the standard adult healthy BMI range of 18.5 to 24.9 for the primary result.
When BMI may be less useful
BMI does not distinguish muscle, fat, bone, age, pregnancy, athletic build, or body-fat distribution. Use it as a general screening estimate, not a diagnosis.
For children and teens, BMI is interpreted differently using age- and sex-specific percentiles. For adults with high muscle mass, edema, pregnancy, or certain medical conditions, a clinician may use other measurements instead.
Other measurements to consider
BMI is often paired with other information, such as waist measurement, blood pressure, lab results, activity level, medical history, and whether weight is changing quickly. A single calculator result cannot replace that broader picture.
If the result raises concern, use it as a prompt for a conversation with a qualified health professional rather than as a final answer.
BMI calculator FAQ
Is BMI a diagnosis? No. BMI is a broad screening estimate and does not measure health by itself.
Who should be cautious with BMI? Athletes, children, older adults, pregnant people, and people with unusual body composition may need a different assessment.
Where do the table ranges come from? The BMI categories follow the NHLBI BMI calculator. The secondary table comes from the NIH BMI Table, Publication No. 22-HL-8190.