Guide
How to measure your body fat percentage
Last updated: July 2026
There are five practical ways to measure body fat: a DEXA scan, skinfold calipers, a bioimpedance scale, the Navy tape formula, and photo estimation. They trade accuracy for cost and effort. A DEXA scan is the most accurate and the most expensive; a photo or a tape measure is the cheapest and the quickest. Whichever you choose, use the same one every time, because a consistent method is what makes the trend readable.
You cannot get your real number from a chatbot or a glance in the mirror. Body fat is estimated, never read directly outside a lab, so the honest goal at home is a stable estimate you can repeat and watch move.
Ways to measure body fat, compared
| Method | Cost | Accuracy | Effort | Best for |
|---|---|---|---|---|
| DEXA / DXA scan | $80–150 per scan | Highest. The clinical reference. | Clinic visit, ~30 min | One precise snapshot |
| Skinfold calipers | $10–30 for the tool | Good, but depends heavily on who pinches | Hard to do on yourself | Cheap tracking with a trained partner |
| Bioimpedance scale (BIA) | $30–150 for the scale | Low. Swings with hydration and food | Instant, step on it | Convenience, if you ignore day-to-day noise |
| Navy tape method | Free (a tape measure) | Rough. A formula from a few circumferences | About two minutes | A quick ballpark |
| Photo estimation (LeanBody) | $5 a reading | Approximate, but consistent scan to scan | ~90 seconds on a phone | Tracking the trend without a clinic |
DEXA reads a few points higher than calipers or scales, so the methods are not interchangeable. If you switch tools mid-way through a cut, you throw away the trend. Pick one and keep it.
How to measure body fat from a photo
Photo estimation is the cheapest way to get a repeatable read without a clinic. Here is the whole process, start to finish.
- 1
Set up the shot
Stand against a plain wall in good, even light from the front. Wear shorts, and a sports bra if that applies. Prop the phone at chest height so it captures you head to feet.
- 2
Take four photos
Front relaxed, front flexed, back relaxed, back flexed. The same four angles every time so the readings stay comparable.
- 3
Enter your stats
Height, weight, age, and sex. These calibrate the estimate against the reference cohort instead of guessing your frame from pixels alone.
- 4
Read the result and repeat monthly
You get a body fat percentage, lean mass, FFMI, and where you land against NHANES data. Run it again in four to six weeks on the same method to see which way the number is moving.
$5 a reading, or a series of six for $20. No subscription.
Common questions
Can I measure my body fat at home?
Yes. Skinfold calipers, a bioimpedance scale, the Navy tape formula, and photo estimation all work at home without a clinic. Each trades some accuracy for convenience. The main thing is to pick one method and stick with it, because a consistent method makes the trend readable even when the absolute number is off.
What's the most accurate way to measure body fat?
A DEXA scan is the practical gold standard for consumers, accurate to within a couple of percentage points and used as the reference other methods are validated against. It costs $80 to $150 and needs a clinic appointment. Hydrostatic weighing and the BOD POD are comparable but harder to access.
How can I measure body fat without a DEXA scan?
Photo estimation, skinfold calipers, and bioimpedance are the common alternatives. Photo-based tools like LeanBody read four physique photos against a reference cohort and return a percentage in about 90 seconds for $5, which is far cheaper than a DEXA and stable enough to track a cut or a bulk over months.
How accurate is measuring body fat from a photo?
Good for tracking your own progress, weaker for a clinical-grade absolute number. A photo captures the visible markers of body fat, like muscle definition and where softness sits, which a vision model scores against reference data. The method is consistent from scan to scan, so the direction of the trend is trustworthy even if the single number is approximate.
What's a normal body fat percentage?
By NHANES 2017-20 DXA data, the median US man is around 25% and the median woman around 36%, with the middle half of adults spanning roughly 21-31% for men and 32-41% for women. Athletic ranges sit well below that. DEXA reads a few points higher than calipers or scales, so compare like with like.
Body fat percentages are estimates, not clinical measurements. LeanBody is not a medical device and is not intended for diagnostic use. Women, see the guide on body fat for women. For related numbers, see the FAQ.