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Energy and Work Conversion Chart

Energy and work conversion chart

Sorted from less to more

Name Energy, work, or heat of unit, E Symbol Definition Relation to SI unit joule, J
joule (SI unit) J ≡ N·m = W·s = V·A·s = kg·m²/s²
electronvolt eV e × 1 V ≈ 1.602 176×10−19J
rydberg Ry R∞·h·c ≈ 2.179 872×10−18 J
hartree Eh ≡ me·α²·c²(= 2 Ry) ≈ 4.359 744×10−18 J
atomicunit of energy au ≡ Eh ≈ 4.359 744×10−18 J  
erg (cgs unit) erg ≡ 1 g·cm²/s² = 10−7 J
foot-poundal ft pdl ≡ 1 lb·ft²/s² = 4.214 011 009 380 48×10−2 J
cubiccentimetre of atmosphere;
standard cubic centimetre
cc atm; scc ≡ 1 atm × 1 cm³ = 0.101 325 J
inch-poundforce in lbf g × 1 lb × 1 in = 0.112 984 829 027 616 7 J
foot-pound force ft lbf g × 1 lb × 1 ft = 1.355 817 948 331 400 4 J
calorie (20 °C) cal20 °C - ≈ 4.1819 J
calorie (thermochemical) calth - ≡ 4.184 J
calorie (15 °C) cal15 °C - ≡ 4.1855 J
calorie (International Table) calIT - ≡ 4.1868 J
calorie (mean) calmean - ≈ 4.190 02 J
calorie (3.98 °C) cal3.98 °C - ≈ 4.2045 J
litre-atmosphere l atm; sl ≡ 1 atm × 1 L = 101.325 J
gallon-atmosphere(U.S.) US gal atm ≡ 1 atm × 1 gal (US) = 383.556 849 013 8 J
gallon-atmosphere (Imperial) US gal atm ≡ 1 atm × 1 gal (Imp) = 460.632 569 25 J
British thermal unit (thermochemical) BTUth ≡ 1lb/g × 1 calth × 1 °F/°C
= 9.489 152 380 4 ÷ 9 kJ
≈ 1.054 350 kJ
Britishthermal unit (ISO) BTUISO - ≡ 1.0545 kJ
Britishthermal unit (63 °F) BTU63 °F - ≈ 1.0546 kJ
Britishthermal unit (60 °F) BTU60 °F - ≈ 1.054 68 kJ
Britishthermal unit (59 °F) BTU59 °F - ≡ 1.054 804 kJ
Britishthermal unit (International Table) BTUIT ≡ 1lb/g × 1 calIT × 1 °F/°C = 1.055 055 852 62 kJ
Britishthermal unit (mean) BTUmean - ≈ 1.055 87 kJ
Britishthermal unit (39 °F) BTU39 °F - ≈ 1.059 67 kJ
Celsiusheat unit (International Table) CHUIT ≡ 1 BTUIT × 1 °C/°F = 1.899 100 534 716 kJ
cubicfoot of atmosphere; standard cubic foot cu ft atm; scf ≡ 1 atm × 1 ft³ = 2.869 204 480 934 4 kJ
kilocalorie; large calorie kcal; Cal ≡ 1000 calIT = 4.1868 kJ
cubicyard of atmosphere; standard cubic yard cu yd atm; scy ≡ 1 atm × 1 yd³ = 77.468 520 985 228 8 kJ
cubicfoot of natural gas - ≡ 1000 BTUIT = 1.055 055 852 62 MJ
horsepower-hour hp·h ≡ 1 hp × 1 h = 2.6845 MJ
kilowatt-hir;Board of Trade Unit kW·h; B.O.T.U. ≡ 1 kW × 1 h = 3.6 MJ
thermie th ≡ 1 McalIT = 4.1868 MJ
therm (U.S.) - ≡ 100 000 BTU59 °F = 105.4804 MJ
therm (E.C.) - ≡ 100 000 BTUIT = 105.505 585 262 MJ
ton of TNT tTNT ≡ 1 Gcalth = 4.184 GJ
barrelof oil equivalent bboe ≈ 5.8 MBTU59 °F ≈ 6.12 GJ
tonof coal equivalent TCE ≡ 7 Gcalth = 29.3076 GJ
tonof oil equivalent TOE ≡ 10 Gcalth = 41.868 GJ
quad - ≡ 1015 BTUIT = 1.055 055 852 62 EJ

 

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