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Energy changes and transformations make things happen,
- energy is the ultimate agent of change,
- energy is the capacity to produce an effect,
- Energy is the capacity to move or to change or to work (electromagnetic energy, solar energy, chemical energy, kinetic energy, work and heat, sound energy.)
The are many anergy unites, hence the below conversion tables.
Power is the speed of energy use, the rate at which work is done.
Power = Work done/Time taken. Power is the rate at which energy is converted from one form into another. [The dot (.) is used for the decimal fraction (European comma (,))]
The power unit is the watt (W), kilowatt (kW), or British horsepower (BHP), Pferdestärke (PS).
1 kW = 1.35962152 PS (DIN) = 1.34102186 BHP = 1.34048257 BHP (electric);
1 BHP = 0.74570000 kW; 1 BHP (electric) = 0.746 kW; 1 PS (DIN) = 0.73549880 kW.

Energy units and conversions:

Power [= the capacity to do work at a certain speed]
Unit 1=Unit 2Comparative value
1 J/s =1 WThe basic power unit: Watt = Joule per second
1 kW=3597 kJ/h100 Watts during 10 hours of human work per day
[1kWh = the work one adult can perform each day, if s/he works for ten hours at a speed of 100 Watts, with an energy intake of approx. 3 kWh a day.]
1000 kJ/h=0.278 kW 
1 kW=3412 BTU/h 
1 BHP=745.7 W 
1 DIN PS=0.7355 kW75 kgm/s
1000 kJ/h=238.8 kcal/h  
125 kJ/h=860 kcal/8h The average speed of work of an adult.
125 kJ/h=34.75 Watt  
34.75 W=0.0466 BHP 
1 BHP=21.46 MPOne Horse can work at the same speed as 22 men.
1 MP=1/22 BHPOne Man-Power is approx. one twentieth of a Horsepower

Energy [= the total work done]
Unit 1=Unit 2Comparative value
1 J =1 Ws 
1000 kJ=238.8 kcal  
1000 kJ=0.278 kWh 
1 kWh=3412 BTU  1 Wh = 3.412 BTU
1000 kJ=0.278 kWh 
1 kWh=3597 kJ 
1 barrel of crude oil=1714 kWhthe daily work performance of 1714 average adults = 13712 person-hours
1 barrel of crude oil=50 US$ (JAN2009)109,696 US$ adult work at 8$/h
1 kcal=4.1868 kJ 
1 kcal=1.1628 Wh 
2500 kcal=2.907 kWhthe daily energy need of an average adult person.
1 kWh=860 kcalthe daily work performance of an average adult person.
1 m3 Erdgas=8.816 kWh 
1 ton of coal equivalent TCE=8140 kWh 
1 ton of oil equivalent TOE=11630 kWh 
1 ton of oil equivalent TOE=1.428 TCE 
1000 BTU=0.2931 kWh 
1 QUAD=1x1015 BTUs
(= 1 quadrillion)
The energy contained in eight billion gallons of gasoline, a year's supply for ten million automobiles.
1 QUAD=293074646 MWhper year (8760 hours) 33.456 GWyear (3n24)
1 QUAD=1.055 1018 joules  
1 QUAD=1.055 exajoules or EJ 
1 barrel=42 gallons 
1 barrel of crude oil= 5,848,000 BTU 
1 Therm (heat)=100,000 BTU
(1.054 108 J)
 
1 barrel of crude oil= 5,848,000 BTU 
Energiequelle (* η=eta=Wirkungsgrad) Standard Verbrauchstwert
Einheit Primarenergie η* erzeugte Energie kWh MWh η* gebrauchte Energie
Wasser (Staudamm) 1 Mio. m3 0,9 0,9 Mio. m3 ... ... 0,3 ... Stunden Elektroheizung
Wasser - 1 Staudamm 1 Mio. m3 ... 0,9 Mio. m3 ... ... ... ... Kilometer Autofahrt; ... Stunden Heizen
Gas (Erdgas) 1 Mio. m3 ... ... Mio. m3 ... ... ... ... Stunden Elektroheizung
Windmühle klein 300 kW ... ... 3 ... ... ... Stunden Beleuchtung
Windmühle gross 5 MW ... ... ... ... 0,3 ... Stunden Elektroheizung
Uranium ... ... ... ... ... ... ... Stunden Heizen

Einheit/unit 1 =Einheit/unit 2 Vergleichswert/comparison
1000 m3Erdgas / Natural gas=8,816 MWh1083 kg SKE - 758 kg RÖE
1 tonne SKE = Steinkohleneinheit=8,14 MWh8140 kWh
1 tonne RÖE = Rohöleinheit=11,63 MWh11630 kWh
1000MJ = Megajoule (=106 Joule)=0,278 MWh278 kWh
1GJ = Gigajoule (=109 Joule)=0,278 MWh278 kWh
1TJ = Terajoule (=1012 Joule)=278 MWh278 000 kWh
1 PJ = Petajoule (=1015 Joule)=278 000 MWh278 Mio. kWh
1 EJ = Exajoule (=1018 Joule)=278 Mio. MWh278 Mia. kWh
1 Mio. BTU = British Thermal Unit=0,2931 MWh293,1 kWh
Einheit 1Einheit 2Vergleichswert
1 J =1 Ws.
1000 kJ=238,8 kcal .
1000 kJ=0,2788 kWh.
1 kWh=3412 BTU.
1 kcal=4,1868 kJ.
1 kcal=1,1628 Wh.
2500 kcal=2,907 kWhTäglicher Energiebedarf eines normalarbeitenden Erwachsenen.
1 kWh=860 kcalTägliche Arbeitsleistung eines durchschnittlichen Erwachsenen.
890'440 Terajoule=MWhEnergieverbrauch in der Schweiz in 2005
1 QUAD=1x1015 BTUs = 1 Million MilliardenDer Energiebedarf von 10 Millionen Autos (USA) .
1000 BTU=0.2931 kWh.

Conversion in the Internet
  • more conversions
  • Oregon State conversions
    k= Kilo= 103 = 1000= Tausend
    M= Mega= 106 = 1 000 000= Million (Mio.)
    G= Giga= 109 = 1 000 000 000= Milliarde (Mia.)
    T= Tera= 1012 = 1 000 000 000 000= Billion (Bill.)
    P= Peta= 1015 = 1 000 000 000 000 000= Billiarde
    E= Exa= 1018 = 1 000 000 000 000 000 000= Trillion
    kg= Kilogramm = 1000 g
    t= Tonne = 1000 kg= 1 000 000 g
    24 October 2010under development > click to empower
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