Orders of magnitude
Distance
36Or1
Orders
The metre.

Distance: the metre.
radius of observable Universe (100-200 Ym)
100 Ym =
10+26 m
hundred yottametres
distance to quasar 3C 295 (50 Ym)
distance to quasar 3C 273 (30 Ym); one gigaparsec (30.9 Ym)
10 Ym =
10+25 m
ten yottametres one gigalight-year (9.46 Ym)
distance to Coma Cluster (3.3 Ym)
distance to Stephan's Quartet (2.4 Ym)
1 Ym =
10+24 m
one yottametre
distance to Virgo supercluster (300-600 Zm)
distance to NGC 1533 (340 Zm)
distance to Messier 83 (260 Zm)
distance to Messier 101 (140 Zm)
100 Zm =
10+23 m
hundred zettametres
size of Local Group (~50 Zm)
one megaparsec (30.9 Zm)
distance to Andromeda (21 Zm)
10 Zm =
10+22 m
ten zettametres one megalight-year (9.46 Zm)
diameter of Messier 101 (2 Zm)
distance to Large Magellanic Cloud (1.5 Zm)
1 Zm =
10+21 m
one zettametre diameter of Galaxy (900 Em)
diameter of Messier 64 (620 Em)
distance to Galactic Core (270 Em)
distance to omega Cen (156 Em); diameter of NGC 1533 (140 Em)
distance to 47 Tuc (120 Em)
100 Em =
10+20 m
hundred exametres
distance to eta Car and the Homunculus Nebula (64 Em); distance to Crab Nebula, Messier 1 (60 Em)
distance to Messier 4 (54 Em)
distance to Trifid Nebula (43 Em); distance to Rosette Nebula (43 Em)
one kiloparsec (30.9 Em)
distance to Aludra, 31 eta CMa (24 Em); distance to Cygnus Loop, NGC 6979 (24 Em)
distance to North American Nebula, NGC 7000 (22 Em); distance to Ring Nebula, Messier 57 (19 Em)
distance to Lesath, 34 upsilon Sco (15 Em); distance to Owl Nebula, Messier 97 (15 Em)
distance to Orion Nebula, Messier 42 (12 Em)
10 Em =
10+19 m
ten exametres distance to Canopus, alpha Car (11 Em); distance to California Nebula (9 Em); one kilolight-year (9.46 Em)
distance to Rigel, 19 beta Ori (8.6 Em)
distance to Betelgeuse, 58 alpha Ori (6.1 Em)
distance to Prasepe (5 Em); distance to Algenib, 88 gamma Peg (4.6 Em)
distance to Antares, 21 alpha Sco (3.1 Em)
distance to Alcyone and the Pleiades, 25 eta Tau (2.3 Em)
distance to Hyades (1.4 Em)
1 Em =
10+18 m
one exametre distance to Mira, 68 Omicron Cet (900 Pm)
distance to Aldebaran, 87 alpha Tau (640 Pm)
distance to Castor, 66 alpha Gem (440 Pm)
distance to Pollux, 78 beta Gem (340 Pm)
distance to Fomalhaut, 24 alpha PsA (210 Pm)
100 Pm =
10+17 m
hundred petametres distance to epsilon Ind (106 Pm)
distance to Sirius, 9 alpha CMa (81.7 Pm)
distance to Barnard's Star (56.5 Pm)
distance to Rigil Kentaurus, alpha Cen (41.1 Pm)
diameter of outer Oort cloud (~30 Pm)
one parsec (30.9 Pm)
10 Pm =
10+16 m
ten petametres one light-year (9.46 Pm)
diameter of inner Oort cloud/outer Hills cloud (~6 Pm)
1 Pm =
10+15 m
one petametre diameter of inner Hills cloud (~900 Tm)
one light-month (778 Tm)
one light-week (181 Tm)
100 Tm =
10+14 m
hundred terametres
diameter of Kuiper belt (~60 Tm)
one light-day (25.9 Tm)
diameter of Pluto's orbit (11.8 Tm)
10 Tm =
10+13 m
ten terametres diameter of Neptune's orbit (9.00 Tm)
diameter of Uranus' orbit (5.74 Tm)
diameter of Saturn's orbit (2.86 Tm)
diameter of Jupiter's orbit (1.56 Tm)
1 Tm =
10+12 m
one terametre one light-hour (1.08 Tm)
diameter of asteroid belt (830 Gm)
diameter of Mars' orbit (456 Gm)
diameter of Earth's orbit (300 Gm)
diameter of Venus' orbit (216 Gm)
diameter of Mercury's orbit (116 Gm)
100 Gm =
10+11 m
hundred gigametres
diameter of Sinope's orbit (23.7 Gm)
diameter of Ananke's orbit (20.7 Gm)
diameter of Phoebe's orbit (13.0 Gm); Himalia's orbit (11.5 Gm)
10 Gm =
10+10 m
ten gigametres one light-minute (18 Gm)
diameter of Nereid's orbit (5.57 Gm)
diameter of Iapetus' orbit (3.56 Gm)
diameter of Callisto's orbit (1.88 Gm)
diameter of Hyperion's orbit (1.48 Gm)
diameter of Sun (1.39 Gm), diameter of Titan's orbit (1.22 Gm)
1 Gm =
10+9 m
one gigametre diameter of Ganymede's orbit (1.07 Gm)
diameter of Moon's orbit (768 Mm)
diameter of Europa's orbit (671 Mm) & Oberon's orbit (583 Mm)
diameter of Rhea's orbit (527 Mm)
diameter of Titania's orbit (436 Mm), Io's orbit (422 Mm), Dione/Helene's orbit (377 Mm), & Triton's orbit (356 Mm)
diameter of Tethys/Telesto/Calypso's orbit (295 Mm)
diameter of Umbriel's orbit (266 Mm) & Enceladus' orbit (238 Mm); one light-second (300 Mm)
diameter of Ariel's orbit (191 Mm), Mimas' orbit (186 Mm), & Amalthea's orbit (182 Mm)
diameter of Janus' orbit (151 Mm); diameter of Jupiter (143 Mm)
diameter of Miranda's orbit (130 Mm); diameter of Saturn (121 Mm)
100 Mm =
10+8 m
hundred megametres
diameter of Uranus (47.6 Mm) & Neptune (44.4 Mm)
diameter of Deimos' orbit (23.5 Mm) & Charon's orbit (19 Mm)
diameter of Earth (12.8 Mm) & Venus (12.2 Mm)
10 Mm =
10+7 m
ten megametres distance from Los Angeles to Beijing (10.1 Mm); diameter of Phobos' orbit (9.4 Mm)
length of Cordillera de Los Andes mountain range (7.3 Mm)
length of Nile River (6.65 Mm); length of Amazon River (6.3 Mm); length of Rocky Mountains (6.04 Mm)
length of Yangtze River (5.52 Mm); diameter of Ganymede (5.10 Mm), Titan (4.88 Mm), Mercury (4.84 Mm), & Callisto (4.72 Mm)
distance from Los Angeles to New York (3.94 Mm); length of Himalayas-Karakoram-Hindu Kush mountains (3.9 Mm)
diameter of Moon (3.48 Mm) & Io (3.48 Mm); length of Indus River (3.19 Mm)
diameter of Europa (2.92 Mm) & Triton (2.7 Mm)
1 Mm =
10+6 m
one megametre diameter of Ceres (914 km)
diameter of Pallas (522 km); length of Lambert-Fischer glacier (515 km); diameter of Vesta (500 km)
length of Noyava Zemlya glacier (419 km)
length of Flint Ridge cave system (292 km)
diameter of Chiron (250 km) & Juno (244 km)
length of Petermanns glacier (200 km)
100 km =
10+5 m
hundred kilometres
10 km =
10+4 m
ten kilometres depth of Marianas Trench, Pacific Ocean (11.0 km); total height of Mauna Kea, Hawaii, from sea floor (10.3 km) height of Mount Everest (8.84 km)
height of Mount McKinley (6.20 km); height of Kilmanjaro (5.90 km)
height of Vinson Massif, Antarctica (5.14 km)
height of Cook, New Zealand (3.76 km)
height of Ben Nevis, United Kingdom (1.34 km)
1 km =
10+3 m
one kilometre height of Angel waterfall, Venezuela (979 m)
height of Yosemite waterfall, United States (739 m)
height of Warsaw Radio mast, near Plock (647 m)
height of Sutherland waterfall, New Zealand (580 m); height of Sears Tower, Chicago (475 m); height of Empire State Building (449 m)
height of Eiffel Tower, Paris (321 m)
length of airship Hindenburg (247 m)
height of Gateway to the West Arch, St. Louis (192 m)
height of Washington Memorial, Washington, D.C. (169 m); height of Great Pyramid of Cheops, Giza (147 m)
1 hm =
10+2 m
one hectometre height of Saturn V rocket including module (110 m); height of Statue of Liberty, New York (93.0 m)
height of Motherland sculpture, Volgograd (82.3 m)
length of Concorde (62.1 m); wingspan of Boeing B-52H (56.4 m)
height of Trajan's Column, Rome (35.1 m); record of longest mammal, Balaenoptera musculus (33.6 m); height of Cleopatra's Needle, London (21 m)
record highest measured ocean wave (26 m)
1 dam =
10+1 m
one dekametre
height of human (~1.7 m)
1 m =
10+0 m
one metre
1 dm =
10-1 m
one decimetre
width of human hand (~5 cm)
length of queen honeybee (1.5 cm)
1 cm =
10-2 m
one centimetre width of human finger (~1 cm)
size of raindrop (~1.5 mm); length of crab louse, Phthirus pubis (1.5 mm)
1 mm =
10-3 m
one millimetre length of Folsoma fimetaria, springtail (1 mm)
length of Braula caeca, insect mite (800 um)
size of amoeba (~600 um)
length of Tetranychus urticae, plant mite (500 um)
length of Knemidocoptes mutans, mange mite (250 um)
100 um =
10-4 m
hundred micrometres
10 um =
10-5 m
ten micrometres
size of bacterium (~2 um)
1 um =
10-6 m
one micrometre
100 nm =
10-7 m
hundred nanometres size of virus (~100 nm)
10 nm =
10-8 m
ten nanometres
1 nm =
10-9 m
one nanometre
100 pm =
10-10 m
hundred picometres Bohr diameter of hydrogen atom in ground state (106 pm)
10 pm =
10-11 m
ten picometres
1 pm =
10-12 m
one picometre
100 fm =
10-13 m
hundred femtometres
diameter of uranium-238 nucleus (11.6 fm)
10 fm =
10-14 m
ten femtometres diameter of lead-208 nucleus (11.0 fm); diameter of tin-120 nucleus (9.2 fm)
diameter of calcium-40 nucleus (7.0 fm); diameter of oxygen-16 nucleus (5.4 fm)
diameter of alpha particle, helium-4 nucleus (3.4 fm)
diameter of proton (1.6 fm)
1 fm =
10-15 m
one femtometre
100 am =
10-16 m
hundred attometres
10 am =
10-17 m
ten attometres
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