How to convert X-units to femtometers
1 x-unit is equal to 100.208 femtometers, and 1 femtometer is equal to 0.009979243174 X-units. To convert, multiply by the conversion factor:
femtometers = X-units × 100.208
femtometers = X-units ÷ 0.009979243174Example: convert 15 xu to fm: 15 × 100.208 = 1,503.12 fm.
X-unit to Femtometer conversion table
| X-unit (xu) | Femtometer (fm) |
|---|---|
| 0.01 xu | 1.00208 fm |
| 0.1 xu | 10.0208 fm |
| 1 xu | 100.208 fm |
| 2 xu | 200.416 fm |
| 3 xu | 300.624 fm |
| 5 xu | 501.04 fm |
| 10 xu | 1,002.08 fm |
| 20 xu | 2,004.16 fm |
| 50 xu | 5,010.4 fm |
| 100 xu | 10,020.8 fm |
| 250 xu | 25,052 fm |
| 500 xu | 50,104 fm |
| 1,000 xu | 100,208 fm |
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
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)