Convert femtometer to kilometer
Please provide values below to convert femtometer [fm] to kilometer [km], or Convert kilometer to femtometer.
1 fm = 1.0000e-18 km. To convert femtometer to kilometer, multiply the value by 1.0000e-18; to go the other way, divide by it (1 km = 1.0000e+18 fm). Both units measure length and appear in everyday as well as technical calculations, so switching between them quickly is often useful.
Quick Reference
- 1 fm = 1.0000e-18 km
- 1 km = 1.0000e+18 fm
- 10 fm = 1.0000e-17 km
- 100 fm = 1.0000e-16 km
How to Convert Femtometer to Kilometer
1 fm = 1e-18 km
Example: convert 15 fm to km:
15 fm = 15 × 1e-18 km = 1.5e-17 km
Femtometer to Kilometer Conversion Table
| femtometer | kilometer |
|---|---|
| 1 fm | 1.0000e-18 km |
| 2 fm | 2.0000e-18 km |
| 3 fm | 3.0000e-18 km |
| 5 fm | 5.0000e-18 km |
| 10 fm | 1.0000e-17 km |
| 20 fm | 2.0000e-17 km |
| 50 fm | 5.0000e-17 km |
| 100 fm | 1.0000e-16 km |
| 500 fm | 5.0000e-16 km |
| 1000 fm | 1.0000e-15 km |
Femtometer
A femtometer is a unit of length in the metric system equal to 10^-15 meters. It is also known as a fermi.
History/Origin
The prefix "femto-" for 10^-15 was adopted by the CGPM (General Conference on Weights and Measures) in 1964. The unit is also named after the physicist Enrico Fermi.
Current Use
The femtometer is primarily used in nuclear physics to measure the size of atomic nuclei.
Kilometer
A kilometer is a unit of length in the metric system, equal to one thousand meters.
History/Origin
The term "kilometer" is derived from the Greek words "khilioi" (thousand) and "metron" (measure). The kilometer was first defined as part of the metric system in France in 1795.
Current Use
The kilometer is the most widely used unit of distance for road signs and travel distances in the world, with the notable exceptions of the United States and the United Kingdom.
Frequently Asked Questions
What is 1 femtometer in kilometer?
1 femtometer (fm) = 1.0000e-18 kilometer (km).
How do you convert femtometer to kilometer?
Multiply the femtometer value by 1.0000e-18. For example, 25 fm × 1.0000e-18 = 2.5000e-17 km.
What is 10 femtometer in kilometer?
10 fm = 1.0000e-17 km.
Which unit is larger, the femtometer or the kilometer?
The kilometer is the larger unit: 1 fm equals only 1.0000e-18 km.