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Body Fat Percentage Calculator Online Vs Alternatives
Body Fat Percentage Calculator Online is one of four common ways to estimate body fat: a browser-based tape-measure calculator like this one, bioelectrical-impedance (BIA) scales, skinfold calipers, or a clinical DEXA scan. Each trades off differently on accuracy, cost, and what you need on hand.
How Body Fat Percentage Calculator Online compares
| Aspect | Body Fat Percentage Calculator Online (this tool) | BIA bathroom scale | Skinfold calipers | DEXA scan |
|---|---|---|---|---|
| Typical accuracy vs. true body fat | within about 3-4 percentage points | within about 3-5 percentage points | within about 3-4 percentage points (technician-dependent) | within about 1-2 percentage points |
| Typical cost | $0 | $20-100 for the scale | $10-30 for calipers | $50-150 per scan |
| Where your data goes | Stays on this device - runs in the browser | Stays on the scale/app | Stays with you (manual) | Stored by the clinic/lab |
| Install / equipment required | No - just a tape measure | Yes, the scale itself | Yes, the calipers | Yes, a clinic visit |
The Navy circumference method this tool uses needs only a tape measure and takes under a minute; it will not match a DEXA scan exactly, but it is precise enough to track a trend over weeks or months.
The calculation runs locally in the browser - no upload and no account.
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