How to convert femtometers to X-units
1 femtometer is equal to 0.009979243174 X-units, and 1 x-unit is equal to 100.208 femtometers. To convert, multiply by the conversion factor:
X-units = femtometers × 0.009979243174
X-units = femtometers ÷ 100.208Example: convert 15 fm to xu: 15 × 0.009979243174 = 0.1496886476 xu.
Femtometer to X-unit conversion table
| Femtometer (fm) | X-unit (xu) |
|---|---|
| 0.01 fm | 0.00009979243174 xu |
| 0.1 fm | 0.0009979243174 xu |
| 1 fm | 0.009979243174 xu |
| 2 fm | 0.01995848635 xu |
| 3 fm | 0.02993772952 xu |
| 5 fm | 0.04989621587 xu |
| 10 fm | 0.09979243174 xu |
| 20 fm | 0.1995848635 xu |
| 50 fm | 0.4989621587 xu |
| 100 fm | 0.9979243174 xu |
| 250 fm | 2.494810794 xu |
| 500 fm | 4.989621587 xu |
| 1,000 fm | 9.979243174 xu |
About the femtometer
A femtometer is 10⁻¹⁵ meters, the scale of atomic nuclei. A proton has a radius of about 0.84 fm.
Symbol: fm · 1 fm = 1 × 10⁻¹⁵ m · Category: Metric (SI)
About the x-unit
The X-unit (about 1.002 × 10⁻¹³ m) was used to express X-ray and gamma-ray wavelengths before the ångström and picometer became standard.
Symbol: xu · 1 xu = 1.00208 × 10⁻¹³ m · Category: Atomic & physics