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Orders of magnitude (temperature)

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Temperature in °C compared to the thermodynamic scale in electron volts, which are also used as a unit of temperature.

List of orders of magnitude for temperature

Factor Multiple Item
0 0 K Absolute zero: free bodies are still, no interaction within or without a thermodynamic system
10−30
 10−6 yK Particular speeds bound paths to exceed size and lifetime of the universe
(see least-energy in orders of magnitude (energy))
10−18
 1 aK Macroscopic teleportation of matter can occur
Hawking temperature of Supermassive black holes
10−15
 1 fK Atomic waves coherent over centimeters
atomic particles decoherent over centimeters
10−12
 1 pK 50 pK, lowest temperature ever produced, achieved with a rubidium gas.[1][better source needed]
100 pK, the current record for lowest temperature, achieved by cooling the nuclear spins of rhodium metal.[2]
450 pK, lowest temperature sodium Bose–Einstein condensate gas ever achieved in the laboratory, at MIT[3]
10−9
 1 nK 50 nK, Fermi temperature of potassium-40
critical temperature of alkali Bose–Einstein condensates
10−6
 1 μK Nuclear demagnetization
Doppler-cooled refrigerants in laser cooling and magneto-optical traps
10−3
 1 mK Radio excitations
1.7 mK, temperature record for helium-3/helium-4 dilution refrigeration, and the lowest temperature which may be sustained for arbitrarily long time with known techniques.
2.5 mK, Fermi melting point of helium-3
60 mK adiabatic demagnetization of paramagnetic molecules
300 mK in evaporative cooling of helium-3
700 mK, helium-3/helium-4 mixtures begin phase separation
950 mK, melting point of helium - All 118 elements are solid at or below this temperature.
microwave excitations
1
 1 K 1 K at the Boomerang Nebula, the coldest natural environment known
1.5 K, melting point of overbound helium
2.19 K, lambda point of overbound superfluid helium
2.725 K, cosmic microwave background
4.1 K, superconductivity point of mercury
4.22 K, boiling point of bound helium
5.19 K, critical temperature of helium
7.2 K, superconductivity point of lead
9.3 K, superconductivity point of niobium
101 10 K Fermi melting point of valence electrons for superconductivity
14.01 K, melting point of bound hydrogen
20.28 K, boiling point of bound hydrogen
33 K, critical temperature of hydrogen
44 K mean on Pluto
53 K mean of Neptune
63 K, melting point of bound nitrogen
68 K mean of Uranus
77.35 K, boiling point of bound nitrogen
90.19 K, boiling point of bound oxygen
92 K, superconductivity point of Y–Ba–Cu–oxide (YBCO)
102 100 K Infrared excitations
134 K, highest-temperature superconductor at ambient pressure, mercury barium calcium copper oxide
165 K, glass point of supercooled water
184.0 K (–89.2 °C), coldest air recorded on Earth
192 K, Debye temperature of ice
273.15 K (0 °C), melting point of bound water
273.16 K (0.01 °C), temperature of triple point of water (defining constant)
~293 K, room temperature
373.15 K (100 °C), boiling point of bound water at sea level
647 K, critical point of superheated water
737.5 K, mean on Venus

See detailed list below

103
 1 kK Visible light excitations
500–2200 K on brown dwarfs (photosphere)
1043 K Curie temperature of iron (point at which iron transitions from ferromagnetic to paramagnetic behavior and loses any permanent magnetism)
1170 K at wood fire
1300 K in lava flows, open flames
1500 K in basalt lava flows
~1670 K at blue candle flame
1811 K, melting point of iron (lower for steel)
1830 K in Bunsen burner flame
1900 K at the Space Shuttle orbiter hull in 8 km/s dive
2022 K, boiling point of lead
2230 K, Debye temperature of carbon
2320 K at open hydrogen flame
2150–2450 K at open hydrocarbon flame
2900 K, color temperature of halogen lamps, blackbody radiation maximum at 1000 nm
3683 K, melting point of tungsten
3925 K, sublimation point of carbon
4160 K, melting point of hafnium carbide
4800 K, 10 MPa, triple point of carbon[4]
5000 K, 12 GPa melting point of diamond[5]
5100 K in cyanogen-dioxygen flame
5516 K at dicyanoacetylene (carbon subnitride)-ozone flame
5650 K at Earth's Inner Core Boundary
5780 K on surface of the Sun
5933 K, boiling point of tungsten
6000 K, mean of the Universe 300,000 years after the Big Bang
7445 K, 850 GPa;[6] 8750 K, 520 GPa;[7] 5400 K, 220 GPa,[8] critical point of diamond/solid III
7735 K, a monatomic ideal gas has one electron volt of kinetic energy
ultraviolet excitations
8000 K, routinely sustainable temperature in an analytical inductively coupled plasma
8801 K, 10.56 GPa[9] 7020.5 K, 797 MPa,[10] critical point of carbon
anionic sparks
104 10 kK 10 kK on Sirius A
10–15 kK in mononitrogen recombination
15.5 kK, critical point of tungsten
25 kK, mean of the Universe 10,000 years after the Big Bang
26 kK on white dwarf Sirius B
28 kK in record cationic lightning over Earth
29 kK on surface of Alnitak (easternmost star of Orion's belt)
4–8–40–160 kK on white dwarfs
30–400 kK on a planetary nebula's asymptotic giant helium star
36 kK boundary between inner and outer core within Jupiter
37 kK in proton–electron reactions
38 kK on Eta Carinae
50 kK at protostar (core)
53 kK on Wolf–Rayet star R136a1
54.5 kK on ON2 III(f*) star LH64-16[11]
>200 kK on Butterfly Nebula
~300 kK at 17 meters from Little Boy's detonation
Fermi boiling point of valence electrons
X-ray excitations
106
 1 MK 0.8 MK in solar wind
γ-ray excitations
1 MK inside old neutron stars, brown dwarfs, and at gravital deuterium fusion range
1–3–10 MK above Sun (corona)
2.4 MK at T Tauri stars and gravital lithium-6 fusion range
2.5 MK at red dwarfs and gravital protium fusion range
10 MK at orange dwarfs and gravital helium-3 fusion range
15.6 MK at Sun's core
10–30–100 MK in stellar flares
20 MK in novæ
23 MK, beryllium-7 fusion range
60 MK above Eta Carinae
85 MK (15 keV) in a magnetic confinement fusion plasma
200 MK at helium star and gravital helium-4 fusion range
230 MK, gravital carbon-12 fusion range
460 MK, gravital neon fusion–disproportionation range
5–530 MK in Tokamak Fusion Test Reactor's plasma
750 MK, gravital oxygen fusion range
109
 1 GK 1 GK, everything 100 seconds after the Big Bang
1.3–1.7 GK, gravital silicon fusion range
3 GK in electron–positron reactions
10 GK in supernovae
10 GK, everything 1 second after the Big Bang
700 GK in quasars' accretion discs
740 GK, Hagedorn temperature or Fermi melting point of pions
1012
 1 TK 0.1–1 TK at new neutron star
0.5–1.2 TK, Fermi melting point of hadrons into quark–gluon plasma
3–5 TK in proton–antiproton reactions
3.6 TK, temperature at which matter doubles in mass (compared to its mass at 0 K) due to relativistic effects
5.5 TK, highest man-made temperature in thermal equilibrium as of 2015 (quark–gluon plasma from LHC collisions)[12]
10 TK, 100 microseconds after the Big Bang
45–67 TK at collapsar of a gamma-ray burst
300–900 TK at proton–nickel conversions in the Tevatron's Main Injector[clarification needed]
1015
 1 PK 0.3–2.2 PK at proton–antiproton collisions

2.8 PK within an electroweak star

1018
 1 EK
1021
 1 ZK
1024
 1 YK 0.5–7 YK at ultra-high-energy cosmic ray collisions
1027
 103 YK everything 10−35 seconds after the Big Bang
1030
 106 YK Hagedorn temperature of strings
1032
 108 YK 142 million YK, Planck temperature of Planck particles and geons or kugelblitzes
everything 5×10−44 seconds after the Big Bang; also predicted likely range of absolute hot
1033
 109 YK Theory of everything excitations[citation needed]
10290
 10266 YK Landau pole of Quantum electrodynamics
∞
 ∞ K Initial singularity[citation needed]

Detailed list for 100 K to 1000 K

Most ordinary human activity takes place at temperatures of this order of magnitude. Circumstances where water naturally occurs in liquid form are shown in light grey.

Kelvin Degrees
Celsius		 Degrees
Fahrenheit		 Condition
100 K −173.15 °C −279.67 °F
165 K −108 °C −163 °F Glass point of supercooled water. (Debatable)[13]
179.9 K −93.2 °C −135.8 °F Coldest luminance temperature recorded on Earth (measured remotely by satellite), in Antarctica at 81.8° S, 59.3° E on 2010-08-10[14]
183.7 K −89.5 °C −129.1 °F Freezing/Melting point of isopropyl alcohol[15]
183.9 K −89.2 °C −128.6 °F Coldest officially recorded air temperature on Earth, at Stántsiya Vostók, Antarctica on 1983-07-21 01:45 UTC (see Vostok Station)
192 K −81 °C −114 °F Debye temperature of ice
194.6 K −78.5 °C −109.3 °F Sublimation point of carbon dioxide (dry ice)
205.5 K −67.7 °C −89.9 °F Coldest officially recorded air temperature in the Northern Hemisphere, at Oymyakon, Oymyakonsky District, Sakha Republic, Russian Soviet Federative Socialist Republic, Union of Soviet Socialist Republics on 1933-02-06[16]
207.05 K −66.1 °C −86.98 °F Coldest officially recorded air temperature in North America, at North Ice, Greenland on 1954-01-09[17]
210 K −63 °C −80 °F Mean on Mars
214.9 K –58.3 °C –72.9 °F Coldest annual mean temperature on Earth, at Dome Argus, Antarctica[18]
223.15 K -50 °C -58 °F Mean on Earth during Snowball Earth[19] around 650 million years ago
224.8 K −48.4 °C −55.0 °F Coldest temperature that water can remain a liquid (see supercooling)
225 K −48 °C −55 °F Freezing/Melting point of cottonseed oil[20]
233.15 K −40 °C −40 °F Intersecting point of the Celsius and Fahrenheit temperature scales
Skin may freeze almost instantly at or below this temperature[21]
234.3 K −38.83 °C −37.89 °F Freezing/melting point of mercury
240.4 K −32.8 °C −27.0 °F Coldest air temperature recorded in South America, at Sarmiento, Argentina on 1907-06-01[22]
249 K –24 °C –11 °F Freezing/melting point of flax seed oil[20]
249.3 K –23.9 °C –11.0 °F Coldest air temperature recorded in Africa, at Ifrane, Morocco on 1935-02-11[22]
250 K –23 °C –9 °F Coldest air temperature recorded in Australia, at Charlotte Pass, New South Wales, Australia on 1994-06-29[22]
255.37 K –177⁄9 °C 0 °F Coldest brine-ice solution found by Daniel Gabriel Fahrenheit
255 K –18 °C 0 °F Freezing/Melting point of almond oil[20]
256 K –17 °C 1 °F Freezing/Melting point of sunflower oil[20]
256 K –17 °C 2 °F Freezing/Melting point of safflower oil[20]
257 K –16 °C 3 °F Freezing/Melting point of soybean oil[20]
262 K −11 °C 12 °F Freezing/Melting point of corn oil[20]
263.15 K –10 °C 14 °F Freezing/Melting point of canola oil[20]
Freezing/melting point of grape seed oil[20]
265 K –8 °C 18 °F White frost can form below this temperature (see frost)
Freezing/melting point of hemp seed oil[20]
265.8 K –7.2 °C 19 °F Freezing/Melting point of bromine
267 K –6 °C 21 °F Freezing/Melting point of olive oil[20]
Freezing/melting point of sesame oil[20]
271.15 K −2 °C 28.4 °F Average freezing/melting point of oceans, the salinity is around 34.7‰.[23][24]
273.15 K 0.00 °C 32.00 °F Freezing/Melting point of fresh water (at STP)
273.16 K 0.01 °C 32.02 °F triple point of fresh water (defining constant)
276 K 3 °C 37 °F Freezing/Melting point of peanut oil[25]
277.13 K 3.98 °C 39.16 °F Water is at maximum density[26]
283.2 K 10 °C 50 °F Minimum temperature for most plant growth (see Growing degree-day)
286.9 K 12.7 °C 54.9 °F Coldest body temperature of a human that survived accidental hypothermia (a 2-year-old boy in Racławice, Poland, on November 30, 2014)[27][28]
288 K 15 °C 59 °F Mean on Earth
Hottest air temperature recorded in Antarctica, at Vanda Station on 1974-05-01[22]
294 K 21 °C 70 °F Room temperature
296 K 23 °C 73 °F Mean on Earth during the Paleocene-Eocene Thermal Maximum[29] about 55.8 million years ago
297 K 24 °C 75 °F Melting/Freezing point of palm kernel oil[20]
298 K 25 °C 77 °F Melting/Freezing point of coconut oil[20]
300 K 27 °C 80.6 °F Estimated melting/freezing point of francium
301 K 28 °C 82.4 °F Minimum temperature for a naked human to be comfortable[30]
302.9 K 29.8 °C 85.6 °F Melting/Freezing point of gallium
303.15 K 30 °C 86 °F Maximum temperature for a naked human to be comfortable[30]
The rate of plant growth is typically no greater above this temperature than at this temperature. (see Growing degree-day)
304 K 31 °C 88 °F Melting/Freezing point of butter, critical point for carbon dioxide
307 K 34 °C 93 °F Kindling point of white phosphorus
307.6 K 34.4 °C 93.9 °F Hottest annual mean temperature on Earth, at Dallol, Ethiopia[18]
308 K 35 °C 95 °F Hypothermic body temperature for humans (see Hypothermia)
Warmest sea measured, at the Red Sea
Melting/freezing point of palm oil[20]
309.5 K 36.4 °C 97.5 °F Average body temperature for a human[31]
311.03 K 37.87 °C 100.2 °F Beginnings of a fever for humans
311.8 K 38.6 °C 101.5 °F Average body temperature for a cat[32]
313.15 K 40 °C 104 °F Maximum standard temperature recommended for hot tub users[33]
315 K 42 °C 108 °F Usually fatal human fever
319.3 K 46.1 °C 115 °F World's hottest air temperature recorded while raining, at Needles, California, USA on August 13, 2012[34]
319.7 K 46.5 °C 115.7 °F Highest human fever survived (Willie Jones)[35]
322.1 K 48.9 °C 120.0 °F Hottest air temperature recorded in South America, at Rivadavia, Argentina on 1905-12-11[22]
Maximum safe temperature for hot water according to numeric U.S. plumbing codes[36]
Water will cause a second-degree burn after 8 minutes and a third-degree burn after 10 minutes[36]
323.9 K 50.7 °C 123.3 °F Hottest air temperature recorded in the Southern Hemisphere, at Oodnadatta, Australia on 1960-02-01[22]
328 K 54 °C 130 °F Hottest reliably measured air temperature on Earth, in Death Valley at Furnace Creek, Inyo County, California, United States of America on 2020-08-16,[37]
333.15 K 60 °C 140 °F Water will cause a second-degree burn in 3 seconds and a third-degree burn in 5 seconds[36]
336 K 63 °C 145.4 °F Milk pasteurization
342 K 69 °C 157 °F Boiling point of water on the summit of Mount Everest[38]
343.15 K 70 °C 158 °F Food is well done
Hot springs at which some bacteria thrive
350 K 77 °C 170 °F Poaching of food
351.52 K 78.37 °C 173.07 °F Boiling point of ethanol
353.15 K 80 °C 176 °F Average temperature of a sauna
355 K 82 °C 180 °F Recommended final rinse temperature in industrial grade commercial dishwashers[39]
355.6 K 82.4 °C 180.3 °F Boiling point of isopropyl alcohol[15]
366 K 93 °C 200 °F Simmering of food
367 K 94 °C 201 °F Hottest ground temperature recorded on Earth at Furnace Creek, Death Valley, California, USA on 1972-07-15[40]
371 K 98 °C 209 °F Freezing/Melting point of sodium
373.13 K 99.98 °C 211.97 °F Boiling point of water at sea level (see Celsius)
380 K 107 °C 225 °F Smoke point of raw safflower oil
Syrup is concentrated to 75% sugar
388 K 115 °C 239 °F Melting/Freezing point of sulfur
400 K 127 °C 260 °F Concorde nose tip during supersonic flight
Coldest known stars in space (approximate temperature)[41]
433.15 K 160 °C 320 °F Syrup is concentrated to 100% sugar
Sucrose (table sugar) caramelizes
450 K 177 °C 350 °F Mean on Mercury
Smoke point of butter
Deep frying
453.15 K 180 °C 356 °F Popcorn pops
483 K 210 °C 410 °F Autoignition (kindling) point of diesel fuel
491 K 218 °C 425 °F Kindling point of paper
519 K 246 °C 475 °F Kindling point of automotive gasoline
522 K 249 °C 480 °F Kindling point of jet fuel (Jet A/Jet A-1)[42]
525 K 252 °C 485 °F Smoke point of milkfat
Kindling point of jet fuel (Jet B)[42]
538 K 265 °C 510 °F Smoke point of refined safflower oil
574.5875 K 301.4375 °C 574.5875 °F Intersecting point of the Fahrenheit and Kelvin temperature scales
600.65 K 327.5 °C 621.5 °F Melting/Freezing point of lead
647 K 374 °C 705 °F Critical point of superheated water
723.15 K 450 °C 842 °F Kindling point of aviation gasoline[42]
Freezing/Melting point of tennessine
738 K 465 °C 870 °F Mean on Venus
749 K 476 °C 889 °F Kindling point of magnesium
798 K 525 °C 977 °F Draper Point (the point at which nearly all objects start to glow dim red)[43]
809 K 536 °C 997 °F Kindling point of hydrogen
883.15 K 610 °C 1130 °F Boiling point of tennessine
933.47 K 660.32 °C 1220.58 °F Melting/Freezing point of aluminium
1000 K 726.85 °C 1340.33 °F

SI multiples

SI multiples of kelvin (K)
Submultiples Multiples
Value SI symbol Name Value SI symbol Name
10−1 K dK decikelvin 101 K daK decakelvin
10−2 K cK centikelvin 102 K hK hectokelvin
10−3 K mK millikelvin 103 K kK kilokelvin
10−6 K μK microkelvin 106 K MK megakelvin
10−9 K nK nanokelvin 109 K GK gigakelvin
10−12 K pK picokelvin 1012 K TK terakelvin
10−15 K fK femtokelvin 1015 K PK petakelvin
10−18 K aK attokelvin 1018 K EK exakelvin
10−21 K zK zeptokelvin 1021 K ZK zettakelvin
10−24 K yK yoctokelvin 1024 K YK yottakelvin
10−27 K rK rontokelvin 1027 K RK ronnakelvin
10−30 K qK quectokelvin 1030 K QK quettakelvin

References

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  14. ^ https://www.bbc.co.uk/news/science-environment-25287806 Coldest spot on Earth identified by satellite
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