Orders of magnitude (length)

The following are examples of orders of magnitude for different lengths.
To help compare different orders of magnitude, the following list describes various lengths between 1.6 × 10 − 35 {\displaystyle 1.6\times 10^{-35}} meters and 10 10 10 122 {\displaystyle 10^{10^{10^{122}}}} meters.
The quectometre (SI symbol: qm) is a unit of length in the metric system equal to 10 metres. To help compare different orders of magnitude, this section lists lengths shorter than 10 m (1 qm).
The rontometre (SI symbol: rm) is a unit of length in the metric system equal to 10 metres.
The yoctometre (SI symbol: ym) is a unit of length in the metric system equal to 10 metres.
The zeptometre (SI symbol: zm) is a unit of length in the metric system equal to 10 metres. To help compare different orders of magnitude, this section lists lengths between 10 m and 10 m (1 zm and 10 zm).
To help compare different orders of magnitude, this section lists lengths between 10 m and 10 m (10 zm and 100 zm).
To help compare different orders of magnitude, this section lists lengths between 10 m and 10 m (100 zm and 1 am).
The attometre (SI symbol: am) is a unit of length in the metric system equal to 10 metres. To help compare different orders of magnitude, this section lists lengths between 10 m and 10 m (1 am and 10 am).
To help compare different orders of magnitude, this section lists lengths between 10 m and 10 m (10 am and 100 am).
To help compare different orders of magnitude, this section lists lengths between 10 m and 10 m (100 am and 1 fm).
The femtometre (SI symbol: fm) is a unit of length in the metric system equal to 10 metres. In particle physics, this unit is sometimes called a fermi, also with abbreviation "fm". To help compare different orders of magnitude, this section lists lengths between 10 meters and 10 meters (1 femtometer and 10 fm).
To help compare different orders of magnitude, this section lists lengths between 10 m and 10 m (10 fm and 100 fm).
To help compare different orders of magnitude, this section lists lengths between 10 m and 10 m (100 fm and 1 pm).
The picometre (SI symbol: pm) is a unit of length in the metric system equal to 10 metres (⁠1/1000000000000⁠ m = 0.000000000001 m). To help compare different orders of magnitude this section lists lengths between 10 and 10 m (1 pm and 10 pm).
To help compare different orders of magnitude this section lists lengths between 10 and 10 m (10 pm and 100 pm).
To help compare different orders of magnitude this section lists lengths between 10 and 10 m (100 pm and 1 nm; 1 Å and 10 Å).
The nanometre (SI symbol: nm) is a unit of length in the metric system equal to 10 metres (⁠1/1000000000⁠ m = 0.000000001 m). To help compare different orders of magnitude, this section lists lengths between 10 and 10 m (1 nm and 10 nm).
To help compare different orders of magnitude this section lists lengths between 10 and 10 m (10 nm and 100 nm).
To help compare different orders of magnitude, this section lists lengths between 10 and 10 m (100 nm and 1 μm).
The micrometre (SI symbol: μm) is a unit of length in the metric system equal to 10 metres (⁠1/1000000⁠ m = 0.000001 m). To help compare different orders of magnitude, this section lists some items with lengths between 10 and 10 m (between 1 and 10 micrometers, or μm).
To help compare different orders of magnitude, this section lists lengths between 10 m and 10 m (10 μm and 100 μm).
To help compare different orders of magnitude, this section lists lengths between 10 m and 10 m (100 μm and 1 mm). The term myriometer (abbr. mom, equivalent to 100 micrometers; frequently confused with the myriameter, 10 kilometers) is deprecated; the decimal metric prefix myrio- is obsolete and was not included among the prefixes when the International System of Units was introduced in 1960.
The millimetre (SI symbol: mm) is a unit of length in the metric system equal to 10 metres (⁠1/1000⁠ m = 0.001 m). To help compare different orders of magnitude, this section lists lengths between 10 m and 10 m (1 mm and 1 cm).
The centimetre (SI symbol: cm) is a unit of length in the metric system equal to 10 metres (⁠1/100⁠ m = 0.01 m). To help compare different orders of magnitude, this section lists lengths between 10 m and 10 m (1 cm and 1 dm).
The decimetre (SI symbol: dm) is a unit of length in the metric system equal to 10 metres (⁠1/10⁠ m = 0.1 m). To help compare different orders of magnitude, this section lists lengths between 10 centimeters and 100 centimeters (10 meter and 1 meter).
10 centimeters (abbreviated to 10 cm) is equal to:
To help compare different orders of magnitude, this section lists lengths between one meter and ten meters. Light, in vacuum, travels 1 meter in 1⁄299,792,458, or 3.3356409519815E-9 of a second.
1 meter is:
The decametre (SI symbol: dam) is a unit of length in the metric system equal to 10 meters (10 m). To help compare different orders of magnitude, this section lists lengths between 10 and 100 meters.
10 meters (very rarely termed a decameter which is abbreviated as dam) is equal to:
The hectometre (SI symbol: hm) is a unit of length in the metric system equal to 100 meters (10 m). To compare different orders of magnitude this section lists lengths between 100 meters and 1,000 meters (1 kilometer).
100 meters (sometimes termed a hectometer) is equal to:
The kilometre (SI symbol: km) is a unit of length in the metric system equal to 1000 meters (10 m). To help compare different orders of magnitude, this section lists lengths between 1 kilometer and 10 kilometers (10 and 10 meters).
1 kilometer (unit symbol km) is equal to:
To help compare different orders of magnitude, this section lists lengths between 10 and 100 kilometers (10 to 10 meters). The myriameter (sometimes also spelled myriometer; 10,000 meters) is a deprecated unit name; the decimal metric prefix myria- (sometimes also written as myrio-) is obsolete and was not included among the prefixes when the International System of Units was introduced in 1960.
10 kilometers is equal to:
A length of 100 kilometers (about 62 miles), as a rough amount, is relatively common in measurements on Earth and for some astronomical objects. It is the altitude at which the FAI defines spaceflight to begin.
To help compare orders of magnitude, this section lists lengths between 100 and 1,000 kilometers (10 and 10 meters).
A distance of 100 kilometers is equal to about 62 miles (or 62.13711922 miles).
The megametre (SI symbol: Mm) is a unit of length in the metric system equal to 1000000 meters (10 m). To help compare different orders of magnitude, this section lists lengths starting at 10 m (1 Mm or 1,000 km).
1 megameter is equal to:
To help compare different orders of magnitude, this section lists lengths starting at 10 meters (10 megameters or 10,000 kilometers).
10 megameters (10 Mm) is
To help compare different orders of magnitude, this section lists lengths starting at 10 meters (100 megameters or 100,000 kilometers or 62,150 miles).
The gigametre (SI symbol: Gm) is a unit of length in the metric system equal to 1000000000 meters (10 m). To help compare different distances this section lists lengths starting at 10 meters (1 gigameter (Gm) or 1 billion meters).
To help compare different distances this section lists lengths starting at 10 meters (10 gigameters (Gm) or 10 million kilometers, or 0.07 astronomical units).
To help compare distances at different orders of magnitude this section lists lengths starting at 10 meters (100 gigameter or 100 million kilometers or 0.7 astronomical units).
The terametre (SI symbol: Tm) is a unit of length in the metric system equal to 1000000000000 meters (10 m). To help compare different distances, this section lists lengths starting at 10 m (1 Tm or 1 billion km or 6.7 astronomical units).
To help compare different distances this section lists lengths starting at 10 m (10 Tm or 10 billion km or 67 astronomical units).
To help compare different distances this section lists lengths starting at 10 m (100 Tm or 100 billion km or 670 astronomical units).
The petametre (SI symbol: Pm) is a unit of length in the metric system equal to 10 meters. To help compare different distances this section lists lengths starting at 10 m (1 Pm or 1 trillion km or 6685 astronomical units (AU) or 0.11 light-years).
To help compare different distances this section lists lengths starting at 10 m (10 Pm or 66,800 AU, 1.06 light-years).
To help compare different distances this section lists lengths between 10 m (100 Pm or 11 light-years) and 10 m (106 light-years).
The exametre (SI symbol: Em) is a unit of length in the metric system equal to 10 meters. To help compare different distances this section lists lengths between 10 m (1 Em or 105.7 light-years) and 10 m (10 Em or 1,057 light-years).
To help compare different orders of magnitude, this section lists distances starting at 10 Em (10 m or 1,100 light-years).
To help compare different orders of magnitude, this section lists distances starting at 100 Em (10 m or 11,000 light-years).
The zettametre (SI symbol: Zm) is a unit of length in the metric system equal to 10 meters. To help compare different orders of magnitude, this section lists distances starting at 1 Zm (10 m or 110,000 light-years).
To help compare different orders of magnitude, this section lists distances starting at 10 Zm (10 m or 1.1 million light-years).
To help compare different orders of magnitude, this section lists distances starting at 100 Zm (10 m or 11 million light-years).
The yottametre (SI symbol: Ym) is a unit of length in the metric system equal to 10 meters.
To help compare different orders of magnitude, this section lists distances starting at 1 Ym (10 m or 105.702 million light-years).
To help compare different orders of magnitude, this section lists distances starting at 10 Ym (10 m or 1.1 billion light-years). At this scale, expansion of the universe becomes significant. Distance of these objects are derived from their measured redshifts, which depends on the cosmological models used.
To help compare different orders of magnitude, this section lists distances starting at 100 Ym (10 m or 11 billion light-years). At this scale, expansion of the universe becomes significant. Distance of these objects are derived from their measured redshifts, which depend on the cosmological models used.
The ronnametre (SI symbol: Rm) is a unit of length in the metric system equal to 10 meters.
To help compare different orders of magnitude, this section lists distances starting at 1 Rm (10 m or 105.7 billion light-years). At this scale, expansion of the universe becomes significant. Distance of these objects are derived from their measured redshifts, which depend on the cosmological models used.