Enter your height and weight to get your BMI, the category it falls in, and the healthy weight range for someone your height. Works in pounds and inches or kilograms and centimetres.
BMI is a population screening tool, not a diagnosis, and it cannot tell muscle from fat. General information only — not medical advice.
What the BMI categories mean
| BMI | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 – 24.9 | Healthy weight |
| 25.0 – 29.9 | Overweight |
| 30.0 and above | Obese |
Why lifters often get a misleading BMI
This is the part most BMI calculators leave out. BMI only knows two things about you: your height and your total weight. It has no idea how much of that weight is muscle and how much is fat.
Muscle is denser than fat, so it weighs more for the same volume. A lean, muscular person can easily land in the “overweight” band while carrying very little body fat — plenty of athletes technically register as obese by BMI. The number is not wrong; it is just answering a different question than the one you care about.
BMI was designed to describe populations, not individuals. It is a cheap screening signal for large groups, which is exactly why doctors still use it — and exactly why it can mislead a single lifter.
Better numbers to track instead
- Body fat percentage — separates muscle from fat, which is the distinction BMI cannot make.
- Waist measurement — a better proxy for the abdominal fat that actually carries health risk.
- Progress photos and how clothes fit — unglamorous, but they capture recomposition that the scale hides completely.
- Strength trend — if your lifts are climbing while your waist holds steady, things are going well regardless of BMI.
Frequently asked questions
Is BMI accurate?
It is accurate at what it measures — weight relative to height — but that is not the same as body composition or health. It works reasonably well across a large population and poorly for individuals at either extreme of muscularity.
What is a healthy BMI?
18.5 to 24.9 is the standard healthy band for adults. The calculator above also shows the actual weight range that band corresponds to for your height.
Should I ignore BMI if I lift?
Not ignore, but do not treat it as the headline number. Use it as one rough data point alongside body fat percentage and waist measurement.
Next: work out what you burn at rest with the BMR calculator, or get your full daily calorie needs from the TDEE calculator. See all our free fitness tools.