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Energy unit conversion table

This table contains conversions between almost all energy units. Some units of energy are common and some are relatively rare. This is a good query tool. Energy Converter

Name of unitSymbolDefinitionRelation to SI units
barrel of oil equivalentboe≈ 7006580000000000000♠5.8 ×10 6 BTU 59 °F≈ 7009612000000000000♠6.12 ×10 9 J
British thermal unit(ISO)BTU ISO≡ 7003105450000000000♠1.0545 ×10 3 J= 7003105450000000000♠1.0545 ×10 3 J
British thermal unit (International Table)BTU IT= 7003105505585262000♠1.055 05585262×10 3 J
British thermal unit (mean)BTU mean≈ 7003105587000000000♠1.055 87×10 3 J
British thermal unit (thermochemical)BTU th≈ 7003105434999999999♠1.054 350×10 3 J
British thermal unit (39 °F)BTU 39 °F≈ 7003105966999999999♠1.059 67×10 3 J
British thermal unit (59 °F)BTU 59 °F≡ 7003105480400000000♠1.054 804×10 3 J= 7003105480400000000♠1.054 804×10 3 J
British thermal unit (60 °F)BTU 60 °F≈ 7003105468000000000♠1.054 68×10 3 J
British thermal unit (63 °F)BTU 63 °F≈ 7003105459999999999♠1.0546 ×10 3 J
calorie(International Table)cal IT≡ 7000418680000000000♠4.1868 J= 7000418680000000000♠4.1868 J
calorie (mean)cal mean​ 1⁄ 100of the energy required to warm one gram of air-free water from 0 °C to 100 °C at a pressure of 1 atm≈ 7000419001999999999♠4.190 02 J
calorie (thermochemical)cal th≡ 4.184 J= 7000418400000000000♠4.184 J
Calorie (US; FDA)Cal≡ 1 kcal = 7003418400000000000♠1000 cal= 7003418400000000000♠4184 J
calorie (3.98 °C)cal 3.98 °C≈ 7000420450000000000♠4.2045 J
calorie (15 °C)cal 15 °C≡ 4.1855 J= 7000418550000000000♠4.1855 J
calorie (20 °C)cal 20 °C≈ 7000418190000000000♠4.1819 J
Celsiusheat unit (International Table)CHU IT≡ 1 BTU IT× 1 K/°R= 7003189910053471600♠1.899 100534716×10 3 J
cubic centimetre of atmosphere; standard cubic centimetrecc atm; scc≡ 1 atm × 1 cm 3= 6999101325000000000♠0.101 325 J
cubic footof atmosphere; standard cubic footcu ft atm; scf≡ 1 atm × 1 ft 3= 7003286920448093440♠2.869 2044809344×10 3 J
cubic foot of natural gas ≡ 7003100000000000000♠1000 BTU IT= 7006105505585262000♠1.055 05585262×10 6 J
cubic yardof atmosphere; standard cubic yardcu yd atm; scy≡ 1 atm × 1 yd 3= 7004774685209852288♠77.468 5209852288×10 3 J
electronvolteV≡ e× 1 V≈ 6981160217656499999♠1.602 176565(35) ×10 −19 J
erg( cgs unit)erg≡ 1 g·cm 2/s 2= 10 −7J
foot-pound forceft lbf≡ ɡ0 × 1 lb × 1 ft= 7000135581794833140♠1.355 8179483314004 J
foot-poundalft pdl≡ 1 lb·ft 2/s 2= 6998421401100938048♠4.214 01100938048×10 −2 J
gallon-atmosphere (imperial)imp gal atm≡ 1 atm × 1 gal (imp)= 7002460632569250000♠460.632 56925 J
gallon-atmosphere (US)US gal atm≡ 1 atm × 1 gal (US)= 7002383556849013800♠383.556 8490138 J
hartree, atomic unit of energyE h≡ m e· α2· c2(= 2 Ry)≈ 6982435974400000000♠4.359 744×10 −18 J
horsepower-hourhp·h≡ 1 hp × 1 h= 7006268451953769617♠2.684 519537696172792×10 6 J
inch-pound forcein lbf≡ ɡ0× 1 lb × 1 in= 6999112984829027616♠0.112 9848290276167 J
joule(SI unit)JThe work done when a force of one newton moves the point of its application a distance of one metre in the direction of the force. = 1 J = 1 m·N = 1 kg·m 2/s 2= 1 C·V = 1 W·s
kilocalorie; large caloriekcal; Cal≡ 7003100000000000000♠1000 cal IT= 7003418680000000000♠4.1868 ×10 3 J
kilowatt-hour; Board of Trade UnitkW·h; B.O.T.U.≡ 1 kW × 1 h= 7006360000000000000♠3.6 ×10 6 J
litre- atmospherel atm; sl≡ 1 atm × 1 L= 7002101325000000000♠101.325 J
quad ≡ 10 15BTU IT= 7018105505585262000♠1.055 05585262×10 18 J
rydbergRy≡ R∞· ℎ· c≈ 6982217987200000000♠2.179 872×10 −18 J
therm(E.C.) ≡ 7005100000000000000♠100 000 BTU IT= 7008105505585262000♠105.505 585262×10 6 J
therm(US) ≡ 7005100000000000000♠100 000 BTU 59 °F= 7008105480400000000♠105.4804 ×10 6 J
thermieth≡ 1 Mcal IT= 7006418680000000000♠4.1868 ×10 6 J
ton of coal equivalentTCE≡ 7 Gcal th= 7010292880000000000♠29.288 ×10 9 J
tonne of oil equivalenttoe≡ 10 Gcal IT= 7010418680000000000♠41.868 ×10 9 J
tonof TNTtTNT≡ 1 Gcal th= 7009418400000000000♠4.184 ×10 9 J