meter
| Symbol: | m |
| Category: | Length |
| SI Equivalent: | 1 m |
| Dimension: | L |
| System: | SI |
| Notes | |
| The base unit of length in the SI system . Historically, the meter has been defined in numerous ways. It has been defined as 1/10,000,000 of the quadrant of the Earth's circumference stretching from the North Pole through Paris to the equator; It was also once defined as the distance between two marked lines on an international prototype, a bar of platinum-iridium alloy; still, it has been defined as 1,650,763.73 wavelengths of the orange-red line in the spectrum of the krypton-86 atom in the vacuum. The latest definition was decided by the General Conference on Weights and Measures in 1983 as the distance light travels in the vacuum in 1/299,792,458 second [17th CGPM, Resolution 1]. | |
95 conversions, showing those commonly used | Show all
1 m =
| Length | ||
| Symbol | Unit Name | |
| 10×109 | Å | angstrom |
| 6.68459×10-12 | AU, UA | astronomical unit |
| 10×1017 | am | attometer |
| 100 | cm | centimeter |
| 3.28084 | ft | foot |
| 1×10-2 | hm | hectometer |
| 39.3701 | in | inch |
| 1×10-3 | km | kilometer |
| 1.05702×10-16 | ly | light-year |
| 3.93701×107 | µin | microinch |
| 1×106 | µm | micron |
| 3.93701×104 | mil, thou | mil (thou) |
| 6.21371×10-4 | mi (stat.) | mile (statute, land) |
| 1000 | mm | millimeter |
| 1×109 | nm | nanometer |
| 5.39957×10-4 | mi (int. naut.) | nautical mile (international) |
| 3.24078×10-17 | pc | parsec |
| 1×1012 | pm | picometer |
| 1.09361 | yd | yard |
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