How to convert femtometers to kilometers
1 femtometer is equal to 1 × 10⁻¹⁸ kilometers, and 1 kilometer is equal to 1 × 10¹⁸ femtometers. To convert, multiply by the conversion factor:
kilometers = femtometers × 1 × 10⁻¹⁸
kilometers = femtometers ÷ 1 × 10¹⁸Example: convert 1 fm to km: 1 × 1 × 10⁻¹⁸ = 1 × 10⁻¹⁸ km.
Femtometer to Kilometer conversion table
| Femtometer (fm) | Kilometer (km) |
|---|---|
| 0.01 fm | 1 × 10⁻²⁰ km |
| 0.1 fm | 1 × 10⁻¹⁹ km |
| 1 fm | 1 × 10⁻¹⁸ km |
| 2 fm | 2 × 10⁻¹⁸ km |
| 3 fm | 3 × 10⁻¹⁸ km |
| 5 fm | 5 × 10⁻¹⁸ km |
| 10 fm | 1 × 10⁻¹⁷ km |
| 20 fm | 2 × 10⁻¹⁷ km |
| 50 fm | 5 × 10⁻¹⁷ km |
| 100 fm | 1 × 10⁻¹⁶ km |
| 250 fm | 2.5 × 10⁻¹⁶ km |
| 500 fm | 5 × 10⁻¹⁶ km |
| 1,000 fm | 1 × 10⁻¹⁵ km |
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 kilometer
A kilometer is 1,000 meters. It's the standard unit for distances between places, road signs and running races in most countries.
Symbol: km · 1 km = 1,000 m · Category: Metric (SI)