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The word Length has several meanings, but most commonly it can be defined as a duration or quantity of time occupied by something or as a distance, measurement of one dimension of something from one end to another or one point to another. It is different from height (vertical extent) and width (measurement from side to side, how wide something is). The unit of length is a fundamental unit which represents a pre-defined distance (or length) with a constant value and other units derive from it. The different measurement units for Length (along with other base units) are a part of complex classification systems:

- The metric system which divides into International System of Units (SI) and Non-SI
- The United States customary units
- British Imperial (imperial units or the imperial system)

There are some obsolete units for a length such as alien, button, cana, cubit, league, line, pace, palm, step, verst, etc. Derived units are associated with derived quantities and are often a combination of two base quantities. Like velocity, being a combination of base quantities like time and length, and respectively the derived unit used for velocity is meter per second (m/s).

Common units of length are: inch, meter, yard, centimeter, millimeter, kilometer, foot, mile, angstrom, rod, astronomical unit, chain, furlong, fathom, nautical mile, parsec, picometer, cun, finger, etc.

(some results are rounded)

Angstroms | Centimeters | Fathoms | Feet | Furlongs | Inches | Kilometers | Meters | Miles | Microns | Millimeters | Nautical Leagues | Nanometers | Nautical Miles | Picometers | Land Leagues | Yards | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|

1 Angstrom = | 1 | 1 x 10^{-8} |
5.4681 x 10^{-11} |
3.2808 x 10^{-10} |
4.971 x 10^{-13} |
3.937 x 10^{-9} |
1 x 10^{-13} |
1 x 10^{-10} |
6.2137 x 10^{-14} |
0.0001 | 1 x 10^{-7} |
1.7999 x 10^{-14} |
0.1 | 5.3996 x 10^{-14} |
100 | 2.0712 x 10^{-14} |
1.0936 x 10^{-10} |

1 Centimeter = | 100000000 | 1 | 0.005468 | 0.0328 | 4.971 x 10^{-5} |
0.3937 | 1 x 10^{-5} |
0.01 | 6.2137 x 10^{-6} |
10000 | 10 | 1.7999 x 10^{-6} |
10000000 | 5.3996 x 10^{-6} |
1 x 10^{10} |
2.0712 x 10^{-6} |
0.0109 |

1 Fathom = | 1.8288 x 10^{10} |
182.88 | 1 | 6 | 0.009091 | 72 | 0.001829 | 1.8288 | 0.001136 | 1828800 | 1829 | 0.00032916 | 1828800000 | 0.00098747 | 1.8288 x 10^{12} |
0.00037879 | 2 |

1 Foot = | 3048000000 | 30.48 | 0.1667 | 1 | 0.001515 | 12 | 0.0003048 | 0.3048 | 0.00018939 | 304800 | 304.8 | 5.486 x 10^{-5} |
304800000 | 0.00016458 | 3.048 x 10^{11} |
6.3131 x 10^{-5} |
0.3333 |

1 Furlong = | 2.0117 x 10^{12} |
20117 | 110 | 660 | 1 | 7920 | 0.2012 | 201.168 | 0.125 | 201168000 | 201168 | 0.0362 | 2.0117 x 10^{11} |
0.1086 | 2.0117 x 10^{14} |
0.0417 | 220 |

1 Inch = | 254000000 | 2.54 | 0.0139 | 0.0833 | 0.00012626 | 1 | 2.54 x 10^{-5} |
0.0254 | 1.5783 x 10^{-5} |
25400 | 25.4 | 4.5716 x 10^{-6} |
25400000 | 1.3715 x 10^{-5} |
2.54 x 10^{10} |
5.2609 x 10^{-6} |
0.0278 |

1 Kilometer = | 1 x 10^{13} |
100000 | 546.8066 | 3281 | 4.971 | 39370 | 1 | 1000 | 0.6214 | 1000000000 | 1000000 | 0.18 | 1 x 10^{12} |
0.54 | 1 x 10^{15} |
0.2071 | 1094 |

1 Meter = | 1 x 10^{10} |
100 | 0.5468 | 3.2808 | 0.004971 | 39.3701 | 0.001 | 1 | 0.00062137 | 1000000 | 1000 | 0.00017999 | 1000000000 | 0.00053996 | 1 x 10^{12} |
0.00020712 | 1.0936 |

1 Mile = | 1.6093 x 10^{13} |
160934 | 880 | 5280 | 8 | 63360 | 1.6093 | 1609 | 1 | 1609344000 | 1609344 | 0.2897 | 1.6093 x 10^{12} |
0.869 | 1.6093 x 10^{15} |
0.3333 | 1760 |

1 Micron = | 10000 | 0.0001 | 5.4681 x 10^{-7} |
3.2808 x 10^{-6} |
4.971 x 10^{-9} |
3.937 x 10^{-5} |
1 x 10^{-9} |
1 x 10^{-6} |
6.2137 x 10^{-10} |
1 | 0.001 | 1.7999 x 10^{-10} |
1000 | 5.3996 x 10^{-10} |
1000000 | 2.0712 x 10^{-10} |
1.0936 x 10^{-6} |

1 Millimeter = | 10000000 | 0.1 | 0.00054681 | 0.003281 | 4.971 x 10^{-6} |
0.0394 | 1 x 10^{-6} |
0.001 | 6.2137 x 10^{-7} |
1000 | 1 | 1.7999 x 10^{-7} |
1000000 | 5.3996 x 10^{-7} |
1000000000 | 2.0712 x 10^{-7} |
0.001094 |

1 Nautical League = | 5.556 x 10^{13} |
555600 | 3038 | 18228 | 27.6187 | 218740 | 5.556 | 5556 | 3.4523 | 5556000000 | 5556000 | 1 | 5.556 x 10^{12} |
3 | 5.556 x 10^{15} |
1.1508 | 6076 |

1 Nanometer = | 10 | 1 x 10^{-7} |
5.4681 x 10^{-10} |
3.2808 x 10^{-9} |
4.971 x 10^{-12} |
3.937 x 10^{-8} |
1 x 10^{-12} |
1 x 10^{-9} |
6.2137 x 10^{-13} |
0.001 | 1 x 10^{-6} |
1.7999 x 10^{-13} |
1 | 5.3996 x 10^{-13} |
1000 | 2.0712 x 10^{-13} |
1.0936 x 10^{-9} |

1 Nautical Mile = | 1.852 x 10^{13} |
185200 | 1013 | 6076 | 9.2062 | 72913 | 1.852 | 1852 | 1.1508 | 1852000000 | 1852000 | 0.3333 | 1.852 x 10^{12} |
1 | 1.852 x 10^{15} |
0.3836 | 2025 |

1 Picometer = | 0.01 | 1 x 10^{-10} |
5.4681 x 10^{-13} |
3.2808 x 10^{-12} |
4.971 x 10^{-15} |
3.937 x 10^{-11} |
1 x 10^{-15} |
1 x 10^{-12} |
6.2137 x 10^{-16} |
1 x 10^{-6} |
1 x 10^{-9} |
1.7999 x 10^{-16} |
0.001 | 5.3996 x 10^{-16} |
1 | 2.0712 x 10^{-16} |
1.0936 x 10^{-12} |

1 Land League = | 4.828 x 10^{13} |
482803 | 2640 | 15840 | 24 | 190080 | 4.828 | 4828 | 3 | 4828032000 | 4828032 | 0.869 | 4.828 x 10^{12} |
2.6069 | 4.828 x 10^{15} |
1 | 5280 |

1 Yard = | 9144000000 | 91.44 | 0.5 | 3 | 0.004545 | 36 | 0.0009144 | 0.9144 | 0.00056818 | 914400 | 914.4 | 0.00016458 | 914400000 | 0.00049374 | 9.144 x 10^{11} |
0.00018939 | 1 |

- 6 Feet to Centimeters
- 50 Centimeters to Inches
- 2 Meters to Feet
- 80 Centimeters to Inches
- 40 Centimeters to Inches
- 150 Centimeters to Inches
- 170 Centimeters to Feet
- 180 Centimeters to Feet
- 6 Inches to Centimeters
- 60 Centimeters to Inches
- 160 Centimeters to Feet
- 3 Meters to Feet
- 10 Meters to Feet
- 180 Centimeters to Inches
- 45 Centimeters to Inches

- 110 Centimeters to Inches
- 10 Inches to Centimeters
- 8 Inches to Centimeters
- 5 Meters to Feet
- 5 Centimeters to Inches
- 9 Inches to Centimeters
- 5 Inches to Centimeters
- 23 Centimeters to Inches
- 5 Feet to Centimeters
- 60 Inches to Feet
- 10 Centimeters to Inches
- 7 Inches to Centimeters
- 60 Millimeters to Inches
- 100 Meters to Feet
- 72 Inches to Feet