List of Orders of Magnitude for length> | ecade of Length | Length using SI prefixes | Length of Item | Item | | 0-35 m | |1.6×10-35 m |Planck length; lengths smaller than this do not make any physical sense, according to current theories of physics |
| .. |
| 0-24 m | 1 yoctometre (ym) | | |
| 0-21 m | 1 zeptometre (zm) | | |
| owspan=2|10-18 m | rowspan=2|1 attometre (am) | |size of a quark |
| |sensitivity of the LIGO detector for gravitational waves |
| owspan=2|10-15 m | rowspan=2|1 femtometre (fm) | |size of a proton |
| |classical electron |
| owspan=2|10-14 m | rowspan=2|10 fm | |scale of the atomic nucleus |
| |range of the weak nuclear force |
| a href="/encyclopedia/1-E-13-m" title="1 E-13 m">10-13 m | 100 fm | |Compton wavelength of electron |
| owspan=3|10-12 m | rowspan=3|1 picometre (pm) | |distance between atomic nuclei in a white dwarf |
| |wavelength of gamma rays |
| pm | wavelength of shortest X-rays |
| owspan=2|10-11 m | rowspan=2|10 pm | 25 pm | radius of hydrogen atom |
| 1 pm | radius of helium atom |
| owspan=11|10-10 m | rowspan=11|100 pm | |wavelength of X rays |
| 00 pm | 1 Ångström |
| 00 pm (0.1 nm) | covalent radius of sulfur atom |
| 26 pm (0.126 nm) | covalent radius of ruthenium atom |
| 35 pm (0.135 nm) | covalent radius of technetium atom |
| 53 pm (0.153 nm) | covalent radius of silver atom |
| 54 pm (0.154 nm) | length of a typical covalent bond (C-C). |
| 55 pm (0.155 nm) | covalent radius of zirconium atom |
| 75 pm (0.175 nm) | covalent radius of thulium atom |
| 25 pm (0.225 nm) | covalent radius of caesium atom |
| 00 pm (0.50 nm) | width of protein α helix |
| a href="/encyclopedia/1-E-9-m" title="1 E-9 m">10-9 m | 1 nanometre (nm) | 2 nm | diameter of DNA helix |
| owspan=4|10-8 m | rowspan=4|10 nm | 20 nm | thickness of bacterial flagellum |
| 0 nm | extreme ultraviolet wavelength |
| 0 nm | human immunodeficiency virus (HIV) (generally, viruses range in size from 20 nm to 450 nm) |
| 00 nm | 90% of particles in wood smoke are smaller than this |
| owspan=13|10-7 m | rowspan=13|100 nm | |size of chromosomes |
| 00 nm | maximum particle size that can fit through a surgical mask |
| 20 nm | maximum particle size that can fit through a ULPA filterhttp://www.ristenbatt.com/filt_eff.htm |
| 80 nm | near ultraviolet wavelength |
| 00 nm | maximum particle size that can fit through a HEPA filter |
| 80-430 nm | wavelength of violet light -- see color and optical spectrum |
| 30-450 nm | wavelength of indigo light |
| 50-500 nm | wavelength of blue light |
| 00-520 nm | wavelength of cyan light |
| 20-565 nm | wavelength of green light |
| 65-590 nm | wavelength of yellow light |
| 90-625 nm | wavelength of orange light |
| 25-740 nm | wavelength of red light |
| owspan=6|10-6 m | rowspan=6|1 micrometre aka micron (m) | 1-10 m | diameter of typical bacterium |
| .55 m | wavelength of light used in optical fibre |
| -8 m | diameter of a human red blood cell |
| m | anthrax spore |
| m | width of strand of spider web http://www.carnicom.com/micro2.htm |
| m | diameter of the nucleus of typical eukariotic cell |
| owspan=12|10-5 m | rowspan=12|10 m | 10 m | typical size of a fog, mist or cloud water droplet |
| 0 m | width of cotton fibre |
| 0.6 m | wavelength of light emitted by a carbon dioxide laser |
| 2 m | width of acrylic fibre |
| 3 m | width of nylon fibre |
| 4 m | width of polyester fibre |
| 5 m | width of silk fibre |
| 7 m | dust mite excreta http://www.ristenbatt.com/filt_eff.htm |
| 0 m | width of wool fibre |
| 5.4 m | 1/1000 inch, commonly referred to as 1 mil |
| 0 m | typical length of Euglena gracilis, a flagellate protist |
| 0 m | average width of human hair (ranges from 18 to 180 m) |
| owspan=6|10-4 m | rowspan=6|100 m | 125 m | bgcolor="F0F0F0"|dust mite |
| 00 m | bgcolor="F0F0F0"|typical length of Paramecium caudatum, a ciliate protist |
| 00 m | bgcolor="F0F0F0"|diameter of Thiomargarita namibiensis, the largest bacterium ever discovered |
| 00 m | bgcolor="F0F0F0"|MEMS micro-engine |
| 00 m | bgcolor="F0F0F0"|diameter of a human ovum |
| 00 m | bgcolor="F0F0F0"|typical length of Amoeba proteus, an amoeboid protist |
| owspan=3|10-3 m | rowspan=3|1 millimetre (mm) | 2.54 mm | bgcolor="E0E0E0"|distance between pins in old DIP (dual-inline-pins) electronic components |
| mm | bgcolor="E0E0E0"|length of average red ant |
| .62 mm | bgcolor="E0E0E0"|common military ammunition size |
| owspan=4| 10-2 m | rowspan=4|1 centimetre (cm) | 1.5 cm | bgcolor="E0E0E0"|length of a large mosquito |
| .54 cm | bgcolor="E0E0E0"|1 inch |
| .1 cm | bgcolor="E0E0E0"|1 attoparsec (10-18 parsecs) |
| .267 cm | bgcolor="E0E0E0"|diameter of a golfball |
| owspan=11|10-1 m | rowspan=11|1 decimetre (dm) | 10 cm | bgcolor="E0E0E0"|wavelength of the highest UHF radio frequency, 3 GHz |
| 0 cm | bgcolor="E0E0E0"|diameter of the cervix upon entering the second stage of labour |
| 0.16 cm | bgcolor="E0E0E0"|Hand using in measuring height of horses (4 inches) |
| 2 cm | bgcolor="E0E0E0"|wavelength of the 2.45 GHz ISM radio band |
| 5 cm | bgcolor="E0E0E0"|height of a Lilliputian from Gulliver's Travels |
| 0.48 cm | bgcolor="E0E0E0"|1 foot |
| 0-65 cm | bgcolor="E0E0E0"|a pizote's tail |
| 6 cm | bgcolor="E0E0E0"|length of the longest pine cones (produced by the sugar pine) |
| 9 cm | bgcolor="E0E0E0"|average adult height of a Hobbit |
| 0 cm | bgcolor="E0E0E0"|average length of a rapier, a fencing sword |
| 1 cm | bgcolor="E0E0E0"|1 yard |
| owspan=6|1 m | rowspan=6|1 metre | 1 m | bgcolor="E0E0E0"|wavelength of the lowest UHF and highest VHF radio frequency, 300 MHz |
| .7 m (5 feet 7 inches) | bgcolor="E0E0E0"|average person's height |
| .435m | bgcolor="E0E0E0"|Standard gauge of railway track |
| .77 - 3.44 m | bgcolor="E0E0E0"|wavelength of the broadcast radio FM band 108 - 87 MHz |
| .048 m (10 feet) | bgcolor="E0E0E0"|height of the basket in basketball |
| .5 m | bgcolor="E0E0E0"|height of tallest animal, the giraffe |
| owspan=18|10 m | rowspan=18|1 decametre (dam) | 10 m | bgcolor="E0E0E0"|wavelength of the lowest VHF and highest shortwave radio frequency, 30 MHz |
| 8.44 m | bgcolor="E0E0E0"|distance between the pitcher's rubber and home plate on a baseball field |
| 0 m | bgcolor="E0E0E0"|length of a cricket pitch |
| 1 m | bgcolor="E0E0E0"|height of High Force waterfall in England. |
| 3 m | bgcolor="E0E0E0"|height of the obelisk of the Place de la Concorde, Paris. |
| 5 m | bgcolor="E0E0E0"|wavelength of the broadcast radio shortwave band at 12 MHz |
| 7.43 m | bgcolor="E0E0E0"|distance between bases on a baseball field |
| 0 m | bgcolor="E0E0E0"|length of a blue whale, the largest animal |
| 1 m | bgcolor="E0E0E0"|wavelength of the broadcast radio shortwave band at 9.7 MHz |
| 0 m | bgcolor="E0E0E0"|average depth beneath the seabed of the Channel tunnel |
| 9 m | bgcolor="E0E0E0"|width of an American football field (53 1/3 yards) |
| 9 m | bgcolor="E0E0E0"|wavelength of the broadcast radio shortwave band at 6.1 MHz |
| 2 m | bgcolor="E0E0E0"|height of Niagara Falls |
| 5 m | bgcolor="E0E0E0"|height of the Leaning Tower of Pisa |
| 0 m | bgcolor="E0E0E0"|Pyramid of Djoser |
| 0 m | bgcolor="E0E0E0"|width of soccer field |
| 0 m | bgcolor="E0E0E0"|length of the Bayeux Tapestry |
| 1.44 m | bgcolor="E0E0E0"|length of an American football field (100 yards, measured between the goal lines) |
| owspan=17|100 m | rowspan=17|1 hectometre (hm) | 100 m | bgcolor="E0E0E0"|wavelength of the lowest shortwave radio frequency and highest medium wave radio frequency, 3 MHz |
| 05 m | bgcolor="E0E0E0"|length of a soccer field |
| 09.73 m | bgcolor="E0E0E0"|total length of an American football field (120 yards, including the end zones) |
| 12.34 m | bgcolor="E0E0E0"|height of the world's tallest tree, a Coast redwood |
| 37 m | bgcolor="E0E0E0"|height of the Great Pyramid of Giza |
| 47 m | bgcolor="E0E0E0"|original height of the Great Pyramid of Giza |
| 68 m | bgcolor="E0E0E0"|height of the Bungsberg, highest point in Schleswig-Holstein, Germany |
| 87 m | bgcolor="E0E0E0"|shortest wavelength of the broadcast radio AM band, 1600 kHz |
| 93 m | bgcolor="E0E0E0"|the approximate length of New Jersey State Highway 59 |
| 44 m | bgcolor="E0E0E0"|height of the City Gate building in Ramat-Gan, Israel |
| 00 m | bgcolor="E0E0E0"|height of the Eiffel Tower |
| 40 m | bgcolor="E0E0E0"|distance sound travels in air in one second; see speed of sound |
| 00-500 m | bgcolor="E0E0E0"|approximate heights of the world's tallest skyscrapers of the past 70 years. |
| 41 m (1,776 ft) | bgcolor="E0E0E0"|height of the planned Freedom Tower at the World Trade Center site |
| 53.33 m | bgcolor="E0E0E0"|height of the CN Tower, the world's tallest free-standing land structure |
| 55 m | bgcolor="E0E0E0"|longest wavelength of the broadcast radio AM band, 540 kHz |
| 47 m | bgcolor="E0E0E0"|height of the Warsaw radio mast, formerly the tallest man-made structure, collapsed in 1991 |
| owspan=4|1,000 m | rowspan=4|1 kilometre (km) | 1 km | bgcolor="E0E0E0"|wavelength of the lowest medium wave radio frequency, 300 kHz |
| 609 m | bgcolor="E0E0E0"|1 international mile |
| 852 m | bgcolor="E0E0E0"|1 nautical mile |
| 848 m | bgcolor="E0E0E0"|height of the highest mountain, Mount Everest |
| owspan=2|10,000 m | rowspan=2|10 km | 10,911 m | bgcolor="E0E0E0"|Mariana Trench |
| 3 km | bgcolor="E0E0E0"|narrowest width of the English Channel at the Strait of Dover |
| a href="/encyclopedia/1-E5-m" title="1 E5 m">100,000 m | 100 km | 111 km | bgcolor="F0F0F0"|one degree of latitude on Earth |
| owspan=2|106 m | rowspan=2|1,000 km = 1 megametre (Mm) | 3,480 km | diameter of the Moon |
| ,400 km | length of the Great Wall of China |
| a href="/encyclopedia/1-E7-m" title="1 E7 m">107 m | 10,000 km | 12,756 km
40,075 km | equatorial diameter of the Earth
length of the Earth's equator |
| a href="/encyclopedia/1-E8-m" title="1 E8 m">108 m | 100,000 km | 384,000 km = 384 Mm | Moon's orbital distance from Earth |
| a href="/encyclopedia/1-E9-m" title="1 E9 m">109 m | 1 million km = 1 gigametre (Gm) | 1,390,000 km = 1.39 Gm | diameter of the Sun |
| a href="/encyclopedia/1-E10-m" title="1 E10 m">1010 m | 10 million km |
| a href="/encyclopedia/1-E11-m" title="1 E11 m">1011 m | 100 million km | 150 million km = 150 Gm | 1 astronomical unit (AU); mean distance between Earth and Sun. |
| owspan=2|1012 m | rowspan=2|1000 million km = 1 terametre (Tm) | 1.4 × 109 km | orbital distance of Saturn from Sun |
| .9 × 109 km = 5.9 Tm | orbital distance of Pluto from Sun |
| a href="/encyclopedia/1-E13-m" title="1 E13 m">1013 m | 10 Tm | 13.8 × 109 km = 13.8 Tm | distance of the Voyager 1 spacecraft from sun (May 2004), the farthest man-made object so far |
| a href="/encyclopedia/1-E14-m" title="1 E14 m">1014 m | 100 Tm |
| a href="/encyclopedia/1-E15-m" title="1 E15 m">1015 m | 1 petametre (Pm) | 9.46 × 1012 km = 9.46 Pm = 1 light year | distance travelled by light in one year |
| owspan=2|1016 m | rowspan=2|10 Pm | 3.2616 light years (3.085681016 m = 30.8568 Pm) | 1 parsec |
| .22 light years = 39.9 Pm | distance to nearest star (Proxima Centauri) |
| a href="/encyclopedia/1-E17-m" title="1 E17 m">1017 m | 100 Pm |
| a href="/encyclopedia/1-E18-m" title="1 E18 m">1018 m | 1 exametre (Em) |
| a href="/encyclopedia/1-E19-m" title="1 E19 m">1019 m | 10 Em |
| a href="/encyclopedia/1-E20-m" title="1 E20 m">1020 m | 100 Em | 100,000 light years | diameter of galactic disk of Milky Way Galaxy |
| owspan=2|1021 m | rowspan=2|1 zettametre (Zm) | 52 kiloparsecs (1.6 × 1021 m = 1.6 Zm) | distance to the Large Magellanic Cloud (a dwarf galaxy orbiting the Milky Way) |
| 4 kiloparsecs (1.66 × 1021 m = 1.66 Zm) | distance to the Small Magellanic Cloud (another dwarf galaxy orbiting the Milky Way) |
| owspan=2|1022 m | rowspan=2|10 Zm | 22.3 Zm (2.36 million light years = 725 kiloparsecs = 22.3 Zm) | distance to Andromeda Galaxy |
| 0 Zm (1.6 Mpc) | diameter of Local Group of galaxies |
| a href="/encyclopedia/1-E23-m" title="1 E23 m">1023 m | 100 Zm | 300-600 Zm (10-20 megaparsecs) | distance to Virgo cluster of galaxies |
| owspan=2|1024 m | rowspan=2|1 yottametre (Ym) | 200 million light years (2 Ym, 60 megaparsecs) | diameter of the Local Supercluster |
| 00 million light years (5 Ym, 150 megaparsecs) | length of Great Wall, the largest observed superstructure in the universe |
| a href="/encyclopedia/1-E25-m" title="1 E25 m">1025 m | 10 Ym |
| owspan=2|1026 m | rowspan=2|100 Ym | 10 × 109 light years | estimated distance to certain quasars, the farthest observed objects in the universe |
| 3.7 × 109 light years = m = 130 Ym | distance the cosmic background radiation has traveled since the Big Bang |
| .. |
| olspan=3 align="center"|infinity??? | possible size of the whole universe |