Transcription of Energy Measurements and Conversions
1 Reviewed June 2021Ag Decision File C6-86 Energy Measurements and ConversionsCommon Prefixes and Abbreviations Deka = tenHecto = hundredKilo = thousandMega = millionGiga = billionTera = trillionBritish thermal unit (Btu)Kilocalories (kcal)Kilojoule (kJ)Kilowatt (kW)Megawatt (MW)Gigawatt (GW)Terawatt (TW)Watthour (Wh) Kilowatthour (kWh)Megawatthour (MWh)Gigawatthour (GWh)Terawatthour (TWh)1 metric ton = 2, pounds1 metric ton = short tons1 kiloliter = barrels (crude oil)1 barrel = 42 gallons1 kiloliter = 1 cubic meterBritish thermal Unit (Btu) Measurements and ConversionsApproximate definition: A british thermal unit is defined as the amount of heat required to raise thetemperature of one pound of water by one degree Btu = 252 International Table calories1 calorie = .00397 Btu1 Btu = .252 kilocalories1 kilocalorie = Btu1 Btu = 1, joules1 Btu = kilojoules1 kilojoule =.
2 947817 Btu1 therm = 100,000 Btu1 dekatherm = 10 therms1 dekatherm = 1 million Btu1 kilowatthour = 3,412 Btu1 horsepower = 2,545 Btu per hourJoule Measurements and ConversionsApproximate definition: the Energy required to lift one newton (102 g or a small apple) one meter against Earth s joule = .0009478 Btu1 Btu = 1, joules1 kilojoule = 1,000 joules1 kilojoule = .947817 Btu1 Btu = kilojoules1 kilojoule = .239 kilocalories1 kilocalorie = kilojoules1 watthour = 3,600 joules1 kilowatthour = megajoules1 megajoule = 1 million joules1 terajoule = 1 million megajoulesElectricity Measurements and ConversionsWattApproximate definition: A human climbing a flight of stairs is doing work at the rate of about 200 : watt = 1 joule per second1 watt = Btu per hour1 Btu per hour = .293 watts1 kilowatt = 1,000 watts1 kilowatt = 3,412 Btu per hour1 kilowatt = horsepower (electric)1 horsepower (electric) =.
3 7457 kilowatts1 megawatt = 1 million watts1 gigawatt = 1 billion watts1 terawatt = 1 trillion watts1 gigawatt = 1 million kilowattsWatthoursApproximate definition: One watthour is the amount of (usually electrical) Energy expended by a one-watt load ( , light bulb) drawing power for one hour. Source: US Department of Energy1 watt second = 1 joule1 watt minute = 60 joules1 watthour = 3,600 joules1 watthour = kilojoulesPage 2Ag Decision Maker File C6-86, Energy Measurements and ConversionsPrepared by Don Hofstrand retired extension value added agriculture institution is an equal opportunity provider. For the full non-discrimination statement or accommodation inquiries, go to kilowatthour = megajoules1 megajoule = .278 kilowatthours1 kilowatthour = 3,412 Btu1 kilowatthour = 860 kilocalories1 kilowatthour = 3,600 kilojoules1 kilowatthour = horsepower hours (electric)1 horsepower hour (electric) =.
4 7457 kilowatthours1 kilowatthour = 1 thousand watthours1 megawatthour = 1 million watthours1 gigawatthour = 1 billion watthours1 terawatthour = 1 trillion watthours1 gigawatthour = 1 million kilowatthours1 terawatthour = 1 billion kilowatthours1 terawatthour = 1 million megawatthoursPower Measurements and Conversions1 Btu per second = kilowatts1 Btu per second = horsepower (electric)1 Btu per second = horsepower (metric)1 Btu per second = .252 kilocalories per second1 kilowatt = .9478 Btu per second1 kilowatt = horsepower (electric)1 kilowatt = horsepower (metric)1 kilowatt = .2388 kilocalories per second1 horsepower (electric) = .7457 kilowatts1 horsepower (electric) = horsepower (metric)1 horsepower (electric) = .1782 kilocalories per second1 horsepower (electric) = .7068 Btu per second1 horsepower (metric) =.
5 9863 horsepower (electric)1 horsepower (metric) = .7355 kilowatts1 horsepower (metric) = .1757 kilocalories per second1 horsepower (metric) = .6971 Btu per secondReferences and Conversion CalculatorsBiomass Energy Datebook, US Department of Energy : Conversion Factors: Energy Information Administration (EIA): Kids Page, EIA: what-is- Monthly Energy Review, EIA: Units and Calculators Explained, EIA: International System of Units (SI) - Conversion Factors for General Use, Calculator for Units of Power, Oklahoma Local Technical Assistance Program (LTAP): : This document includes units of measurement that may have more than one definition. Refer to sources listed for more detailed information.
