Length

The SI unit of length is the metre and is equal to 1650763.73 wavelengths in vacuum of the radiation corresponding to the transition 2p₁₀-5d_s of a krypton 86 atom.

Conversions
1 foot = 0.3048 m 1 fathom = 1.8288 m 1 mile = 1609 m 1 nautical mile = 1852 m 1 cable = 219.456 m 1 inch = 0.0254 m


Examples
Classical electron radius 2.817940285x10^-15m Wavelength of red visible light 7x10^-7m Equatorial radius of the Earth 6.37814x10⁶m Orbital semi-major axis about the sun 1.495979x10¹¹m