Energy & Power Conversion Formulas


#1

Power & Heat Units

1 MW = 1,000 kW
1 kW = 1,000 Watts
1 kWh = 3,412 Btu
1 kWh = 1.340 Hp hours
1,000 Btu = 0.293 kWh
1 Therm = 100,000 Btu (British Thermal Units)
1 Million Btu = 293.1 Kilowatt hours
100,000 Btu = 1 Therm
1 Watt = 3.412 Btu per hour
1 Horsepower = 746 Watts
1 Horsepower hr. = 2,545 Btu

Heat & Energy Units

1 KJ = 1,000 Joules
1 MJ = 1,000 KJ
1 MJ = 1,000,000 Joules
1 KJ = .239005 Kilocalories
1 Joule = 0.23901 Calories
1 Calorie = 4.184 Joules
1 Kcal/Kg = 1.8 Btu’s/lb.
1 Million Btu = 252 Megacalories
1 Btu = 252 Calories
1 Btu = 1,055 Joules
1 Million Btu = 1,055 Megajoules
1 Btu/hour = .2519 Kilocalories/hour
1 Btu/lb. = 2.3260000 KJ/KG
1 Btu/lb. = 0.5559 Kilocalories/KG

Power Generation Units

1 MWe = 1,000 kW
1 MWh = 3,600 MJ
1 MWt (thermal energy) = Approximately 1,000 kg. steam/hr.

Natural Gas Units

1 Cubic foot of natural gas = 1,020 Btu (approx)
1 Therm = 100,000 Btu
1 Decatherm = 10 therms
1 Decatherm = 106 Btu
1 Decatherm = 1,000 cubic feet of natural gas (approx)
1 Decatherm = 0.974 Mcf at 1,026 Btu per cubic foot
1 Mcf = 1.026 MMBtu (approx)
1 Mcf = 1.026 Decatherm (approx)
1 MMBtu = 106 Btu’s

Mass Units

1 Metric ton = 1,000 KG
1 Metric ton = 0.9071847 short tons
1 Metric ton = 1.016047 long tons
1 Metric ton = 2,204.622 pounds (lb.)

Temperature

°C = (°F – 32)5/9

°F = (9/5)(°C)+32