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Units

  • 1 British Thermal Unit (Btu) is the amount of heat necessary to raise the temperature of one pound of water one degree Fahrenheit
  • 1 calorie (cal) is the amount of heat needed to raise the temperature of one gram of water 1 degree Centigrade
  • 1 Joule is the MKS (SI) unit-one newton acting through one meter (one newton is one kg/m2)
  • 1 Watt is the power from a current of 1 Ampere flowing through 1 Volt
  • 1 kilowatt is a thousand Watts
  • 1 kilowatt-hour (kwh) is the energy of one kilowatt power flowing for one hour (E = P t)

Conversions

  • 1 Btu = 252 cal
  • 1 Quad = 1 quadrillion Btu = 1015 Btu
  • 1 therm = 100,000 Btu
  • 1 calorie (cal) = 4.184 J (calories used in food are actually kilocalories)
  • 1 kilowatt-hour (kwh) = one kilowatt flowing for one hour = 3.6 x 106 Joules
  • Gas conversion: One thousand cu. ft. gas (Mcf) >1.027 million Btu = 1.083 billion joules = 301 kwh
  • 1 Mcf > 10.27 therms (1,027,000 Btu)

Source: California Energy Data

Online Conversions Calculators

Useful Conversion Tables

Joule

Quadrillion Btu

Kilogram Calorie Metric Ton of Coal Equivalent Barrel of Oil Equivalent Metric Ton of Oil Equivalent Cubic Meter of Natural Gas Terawatt Year
1 J =
1
947.9 × 10-21
239 × 10-6
34.14 × 10-12
163.4 × 10-12
22.34 × 10-12
26.84 × 10-9
31.71 × 10-21
1 Quad  =  
1055 × 1015
1
252 × 1012
36.02 × 106
172.4 × 106
23.57 × 106
28.32 × 109
33.45 × 10- 3
1 kcal =
4184
3966 × 10-18
1
142.9 × 10-9
683.8 × 10-9
93.47 × 10-9
112.3 × 10-6
132.7 × 10-18
1 mcte =
29.29 × 109
27.76 × 10-9
7 × 106
4.786
0.6543
786.1
928.7 × 10-12
1
1 boe =
6119 × 106
5.8 × 10-9
1462 × 103
0.2089
1
0.1367
164.2
194 × 10-12
1 mtoe =
44.76 × 109
42.43 × 10-9
10.7 × 106
1.528
7.315
1
1201
1419 × 10-12
1 m3gas =
37.26 × 106
35.31 × 10-12
8905
1272 × 10-6
6089 × 10-6
832.3 × 10-6
1
1181 × 10-15
1 Twyr =
31.54 × 1018
29.89
7537 × 1012
1076 × 106
5154 × 106
704.5 × 106
846.4 × 109
1

Source: Pacific Rim Energy and Environment Center

 

CRUDE OIL
To Tonnes (metric)
To Kiloliters
To Barrels
To US Gallons
To Tonnes per Year
From:
Multiply by:
Tonnes (Metric)
1
1.165
7.33
308
-
Kiloliters
0.858
1
6.2898
264
  
Barrels
0.136
0.159
1
42
-
US Gallons
0.00325
0.0038
0.0238
1
-
Barrels/Day
-
-
-
-
49.8
             
PRODUCTS
To Convert:
Barrels to Tonnes
Tonnes
Kiloliters to Tonnes
Tonnes to Kilolitres
Multiply by:
LPG
0.086
11.6
0.542
1.844
Gasoline
0.188
8.5
0.740
1.351
Distillate Fuel Oil
0.133
7.5
0.839
1.192
Residual Fuel Oil
0.149
6.7
0.939
1.065
             
NATURAL GAS AND LNG
To Billion Cubic Meters NG
To Billion Cubic Feet NG
To Million Tonnes Oil Equivalent
To Million Tonnes LNG
To Trillion British Thermal Units
To Million Barrels Oil Equivalent
From
Multiply by:
1 Billion Cubic Meters NG
1
35.5
0.90
0.73
36
6.29
1 Billion Cubic Feet NG
0.028
1
0.026
0.021
1.03
0.18
1 Million Tonnes Oil Equivalent
1.1111
39.2
1
0.805
40.4
7.33
1 Million Tonnes LNG
1.38
48.7
1.23

1

52.0
8.68
1 Trillion British Thermal Units
0.028
0.98
0.14
0.12
5.8
1
1 Million Barrels Oil Equivalent
0.16
5.61
0.14
0.12
5.8
1
Source: BP Statistical Review of US Energy 2002

 

Other Common Energy Relationships

  • 1 Metric Tonne = 2204.62 lb. or 1.1023 short tons
  • 1 Kiloliter = 6.2898 barrels
  • 1 Kilojoule (kJ) = 0.239 kcal or 0.948 Btu
  • 1 Joule = 1 Watt-second = 947.9 × 10-21 quadrillion Btu
  • 1 quadrillion Btu = 1.0551 exajoule
  • 1 exajoule = 1018 joules = 0.9479 quadrillion Btu
  • 1 British thermal unit (Btu) = 0.252 kcal or 252 cal or 1.055 kj or 1055 joules
  • 1 Kilowatt-hour (kWh) = 860 kcal or 3600 kJ or 3412 Btu
  • 1 Kilocalorie (kcal) = 4.187 kj or 3.968 Btu
  • 1 Calorie = 2.54 joules
  • 1 kilowatt-hour (kwh) of electricity is 3,412 Btu
  • 1 average megawatt of electricity is 8,760,000 KWh
  • 1 therm of natural gas is 100,000 Btu
  • 1 barrel of oil is 42 gallons
  • 1 barrel of crude oil is 5,848,000 Btu
  • 1 barrel of distillate oil is 5,825,000 Btu
  • 1 barrel of residual oil is 6,287,000 Btu
  • 1 barrel of gasoline is 5,248,000 Btu
  • 1 barrel of kerosene is 5,670,000 Btu
  • 1 barrel of jet fuel is 5,513,000 Btu
  • 1 barrel of liquified petroleum gas (LPG) is 4,011,000 Btu
  • 1 cord of oak is 32,000,000 Btu
  • 1 cord of lodgepole pine is is 20,000,000 Btu
  • 1 ton of wood pellets is 16,000,000 Btu

Source: Oregon Department of Energy

© MAP Royalty, Inc. 2008