Conversion Calculator for Units of LENGTH Type in size . . . select units . . . metres inches feet yards chains furlongs miles fathoms nautical miles US survey feet angstroms nanometres micrometres millimetres centimetres metres kilometres light years astronomical units parsecs then press Else Values are shown to . . . 3 4 5 6 7 8 9 significant figures. inches angstroms feet nanometres yards **micrometres chains millimetres furlongs centimetres miles metres fathoms kilometres nautical miles light years *astro. units US survey feet parsecs Unit shown in red is the SI 'preferred' unit. **'micrometres' are often referred to as 'microns' *astro. units are 'astronomical units' Very large and very small numbers appear in e-Format and are NOT spaced. Unvalued zeros on all numbers have been suppressed. There is a separate calculator for dealing with feet and inches combined. Caution NO guarantee as to the accuracy of these values is given. And they should be checked against some other source.