Orders of magnitude (temperature)

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] 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
10^1	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)
10^2	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
10^3	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
10^4	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
10^6	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
10^9	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
10^12	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
10^15	1 PK	0.3–2.2 PK at proton–antiproton collisions 2.8 PK within an electroweak star
10^18	1 EK
10^21	1 ZK
10^24	1 YK	0.5–7 YK at ultra-high-energy cosmic ray collisions
10^27	10^3 YK	everything 10^−35 seconds after the Big Bang
10^30	10^6 YK	Hagedorn temperature of strings
10^32	10^8 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
10^33	10^9 YK	Theory of everything excitations
10^290	10^266 YK	Landau pole of Quantum electrodynamics
∞	∞ K	Initial singularity

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	–17​^7⁄9 °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		10^1 K	daK	decakelvin
10^−2 K	cK	centikelvin		10^2 K	hK	hectokelvin
10^−3 K	mK	millikelvin		10^3 K	kK	kilokelvin
10^−6 K	µK	microkelvin		10^6 K	MK	megakelvin
10^−9 K	nK	nanokelvin		10^9 K	GK	gigakelvin
10^−12 K	pK	picokelvin		10^12 K	TK	terakelvin
10^−15 K	fK	femtokelvin		10^15 K	PK	petakelvin
10^−18 K	aK	attokelvin		10^18 K	EK	exakelvin
10^−21 K	zK	zeptokelvin		10^21 K	ZK	zettakelvin
10^−24 K	yK	yoctokelvin		10^24 K	YK	yottakelvin

References

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2. "World record in low temperatures". Archived from the original on 2009-06-18. Retrieved 2009-05-05.
3. "Bose-Einstein condensates break temperature record".
4. Savvatimskii, Aleksandr I (2003). "Melting point of graphite and liquid carbon (Concerning the paper 'Experimental investigation of the thermal properties of carbon at high temperatures and moderate pressures' by EI Asinovskii, A V Kirillin, and a V Kostanovskii)". Physics-Uspekhi. 46 (12): 1295–1303. Bibcode:2003PhyU...46.1295S. doi:10.1070/PU2003v046n12ABEH001699.
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8. Gerald I. Kerley and Lalit Chhabildas, "Multicomponent-Multiphase Equation of State for Carbon", Sandia National Laboratories (2001)
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10. Man Chai Chang; Ryong, Ryoo; Mu Shik Jhon (1985). "Thermodynamic properties of liquid carbon". Carbon. 23 (5): 481–485. doi:10.1016/0008-6223(85)90083-1.
11. Massey, Philip; Bresolin, Fabio; Kudritzki, Rolf P.; Puls, Joachim; Pauldrach, A. W. A. (2004). "The Physical Properties and Effective Temperature Scale of O‐Type Stars as a Function of Metallicity. I. A Sample of 20 Stars in the Magellanic Clouds". The Astrophysical Journal. 608 (2): 1001–1027. arXiv:astro-ph/0402633. Bibcode:2004ApJ...608.1001M. doi:10.1086/420766. S2CID 119373878.
12. "Highest man-made temperature". Guinness World Records. Jim Pattison Group. Retrieved 16 August 2015.
13. Jestin Baby Mandumpal (2017). A Journey Through Water: A Scientific Exploration of The Most Anomalous Liquid on Earth. Bentham Science Publishers. p. 148. ISBN 9781681084237.
14. https://www.bbc.co.uk/news/science-environment-25287806 Coldest spot on Earth identified by satellite
15. http://www.nap.edu/openbook.php?record_id=690&page=56 The National Academies Press – Emergency and Continuous Exposure Limits for Selected Airborne Contaminants Volume 2 ( 1984 )
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19. http://www.space.com/9461-snowball-earth-scenario-plunged-planet-million-year-winters.html 'Snowball Earth' Scenario Plunged Our Planet Into Million-Year Winters
20. Veganbaking.net – Fat and Oil Melt Point Temperatures http://www.veganbaking.net/tools/fat-and-oil-melt-point-temperatures
21. http://www.weathernotebook.org/transcripts/2001/02/07.html Archived 2013-11-06 at the Wayback Machine The Weather Notebook – 40 Below
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25. http://www.newton.dep.anl.gov/askasci/chem03/chem03265.htm U.S. Dept. of Energy – Office of Science – Oils and Low Temperature
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29. https://www.climate.gov/news-features/climate-qa/whats-hottest-earths-ever-been What's the hottest Earth's ever been?
30. http://dictionary.reference.com/browse/comfort+zone Dictionary.com – Comfort Zone
31. Harvard Health Publishing - Time to redefine normal body temperature? https://www.health.harvard.edu/blog/time-to-redefine-normal-body-temperature-2020031319173
32. http://people.rit.edu/hmm5837/320/project2/page4.html Archived 2013-11-12 at the Wayback Machine Rochester Institute for Technology – Random Cat Facts
33. http://www.jacuzzi.com/hot-tubs/hot-tub-blog/ideal-hot-tub-water-temperature/. Finding The Ideal Hot Tub Temperature. Jacuzzi
34. http://www.wunderground.com/blog/JeffMasters/hottest-rain-on-record-rain-falls-at-115f-in-needles-california Wunderground.com – Dr. Jeff Masters' Wunderblog – Hottest rain on record? Rain falls at 115°F in Needles, California
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38. http://science.howstuffworks.com/dictionary/chemistry-terms/boiling-info.htm HowStuffWorks – Boiling
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42. INTERNATIONAL FIRE TRAINING CENTRE: FIREFIGHTER INITIAL: AVIATION FUELS AND FUEL TANKS - International Fire Training Centre
43. Draper, John William (1847). "On the production of light by heat". The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science. Taylor & Francis. 30 (202): 345–359. doi:10.1080/14786444708647190.

External links

• Online Temperature Conversion