Free Tool
BMI Calculator
Enter your height and weight to see your BMI and where it lands on the WHO scale. BMI is a population screening tool, so the page also explains where it gets people wrong.
Read this before you read your number
BMI cannot tell muscle from fat. If you lift weights regularly, BMI will likely overstate your risk. A 200 lb lifter at 12 percent body fat and a 200 lb sedentary adult at 30 percent body fat read the same on BMI. Use body fat percent or waist-to-height ratio if you want a body-composition number.
Your measurements
Your BMI
25.8
Overweight
Elevated cardiometabolic risk at the population level. Often misclassifies muscular individuals.
Healthy BMI range at your height
129 lb to 174 lb
Corresponds to BMI 18.5 to 24.9.
BMI categories
WHO classification with the weight in your current unit at your height.
| Category | BMI range |
|---|---|
| Underweight | BMI < 18.5 |
| Normal weight | BMI 18.5 to 24.9 |
| OverweightYou | BMI 25.0 to 29.9 |
| Obesity class I | BMI 30.0 to 34.9 |
| Obesity class II | BMI 35.0 to 39.9 |
| Obesity class III | BMI 40.0 and above |
Track BMI alongside body fat for a complete picture
Zealova logs weight, body fat, waist, and BMI in one trend chart, so you see what is actually changing.
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Methodology + Sources
- WHO (2000). Obesity: Preventing and Managing the Global Epidemic. WHO Technical Report Series 894.
- NIH NHLBI (1998). Clinical Guidelines on the Identification, Evaluation, and Treatment of Overweight and Obesity in Adults.
- Winter JE, MacInnis RJ, Wattanapenpaiboon N, Nowson CA (2014). BMI and all-cause mortality in older adults. Am J Clin Nutr 99(4).
Last updated: 2026-05-14
Built by Sai, founder of Zealova. Not a neutral third party. Calculator results are estimates. For medical decisions, consult a qualified professional.
Frequently asked questions
Is BMI accurate for muscular people?+
No. BMI uses only height and weight, so it cannot tell muscle from fat. Lifters, athletes, and most people with a regular strength-training habit will read as overweight or obese on BMI while having healthy or low body fat. For that group, use body fat percent or waist-to-height ratio instead.
What BMI is healthiest?+
For adults under 65, the WHO normal range is BMI 18.5 to 24.9. For adults 65 and older, large meta-analyses find lowest all-cause mortality between BMI 23 and 28, so a slightly higher reading can be protective.
Should I use BMI or body fat percent?+
Body fat percent is more informative because it separates lean mass from fat mass. BMI is fine as a quick screen, but body fat percent should drive any goal-setting. The Body Fat Calculator on this site gives a Navy method estimate with no equipment.
Does BMI apply to children or pregnant women?+
No. Children use BMI-for-age percentile charts from the CDC. Pregnant women should not use adult BMI because weight gain is expected and tracked separately by a clinician.
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