Convert Femtometers to Astronomical Units
Convert Femtometers (fm) to Astronomical Units (AU) instantly and accurately.
Conversion Formula
AU = fm × 6.684587122e-27
About Femtometers
A femtometer (fm) is an incredibly tiny unit equal to one quadrillionth of a meter (10⁻¹⁵ m). To put this in perspective, if an atom were the size of a football field, a femtometer would be the size of a marble. This unit is primarily used in nuclear physics to measure the size of atomic nuclei, protons, and neutrons. The proton, for example, has a diameter of about 1.7 femtometers.
About Astronomical Units
An astronomical unit (AU) is the average distance between Earth and the Sun, precisely defined as 149,597,870.7 kilometers. This unit provides a convenient scale for measuring distances within our solar system. Mars orbits at 1.5 AU, Jupiter at 5.2 AU, and Neptune at about 30 AU from the Sun. The dwarf planet Pluto reaches up to 49 AU away. Light takes about 8.3 minutes to travel 1 AU, explaining why we see the Sun as it was 8 minutes ago. The AU is fundamental in astronomy and space exploration.
Quick Reference Table
| Femtometers (fm) | Astronomical Units (AU) |
|---|---|
| 1 fm | 6.685 × 10-27 AU |
| 2 fm | 1.337 × 10-26 AU |
| 5 fm | 3.342 × 10-26 AU |
| 10 fm | 6.685 × 10-26 AU |
| 25 fm | 1.671 × 10-25 AU |
| 50 fm | 3.342 × 10-25 AU |
| 100 fm | 6.685 × 10-25 AU |