Energy Conversion Calculator

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Value to Convert

Answer:

= 0.238662345 cal_mean

Divide by 4.19
for quick conversions

J / 4.19 = cal_mean

Solution

To convert J to cal_mean, use the conversion factor

1 cal_mean = 4.19002 J

then divide both sides of the equation by cal_mean, to get the conversion ratio

1 = 4.19002 J / cal_mean

Use the conversion ratio to complete the unit conversion, basically dividing the input by 1, the J units cancel out, and we are left with cal_mean units.

1 J ÷ 4.19002 J / cal_mean
= 0.238662345 cal_mean

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Calculator Use

Convert units of energy by entering the amount of energy and selecting the units you have, and the units you want to convert to.

(IT) = International Table
(th) = Thermochemical

How to Convert Units of Energy

Conversions are performed by using a conversion factor. By knowing the conversion factor, converting between units can become a simple multiplication problem:

S * C = E

Where S is our starting value, C is our conversion factor, and E is our end converted result.

To simply convert from any unit into joules, for example, from 100 kilowat-hours, just multiply by the conversion value in the right column in the table below.

100 kW · h * 3600000 [ (J) / ( kW · h) ] = 360000000 J

To convert from J into units in the left column divide by the value in the right column or, multiply by the reciprocal, 1/x.

360000000 J / 3600000 [ (J) / ( kW · h) ] = 100 kW · h

To convert among any units in the left column, say from A to B, you can multiply by the factor for A to convert A into Joules then divide by the factor for B to convert out of Joules. Or, you can find the single factor you need by dividing the A factor by the B factor.

For example, to convert from kilowat-hours to British Thermal Units you would multiply by 3600000 then divide by 1055.056. Or, multiply by 3600000/1055.056 = 3412.141156488. So, to convert directly from kW · h to BTU you multiply by 3412.141156488.

Units, symbols and conversion values
used in this energy calculator

To Convert from
Unit

Unit
Symbol

and Convert to
( J )

Multiply by
( J / Unit )

British thermal unit [IT]

BTU_IT

joule

1055.056

British thermal unit [th]

BTU_th

joule

1054.35

British thermal unit [mean]

BTU_mean

joule

1055.87

British thermal unit [39°F]

BTU_39°F

joule

1059.67

British thermal unit [59°F]

BTU_59°F

joule

1054.8

British thermal unit [60°F]

BTU_60°F

joule

1054.68

calorie [IT]

cal_IT

joule

4.1868

calorie [th]

cal_th

joule

4.184

calorie [mean]

cal_mean

joule

4.19002

calorie [15°C]

cal_15°C

joule

4.1858

calorie [20°C]

cal_20°C

joule

4.1819

electronvolt

joule

1.60218E-19

erg

joule

0.0000001

foot-poundal

ft·pdl

joule

0.04214011

foot-pound-force

ft·lbf

joule

1.355818

inch-pound-force

in·lbf

joule

0.112984829

joule

kilojoule

joule

1000

megajoule

joule

1000000

kilocalorie [IT]

kcal_IT

joule

4186.8

kilocalorie [th]

kcal_th

joule

4184

kilocalorie [mean]

kcal_mean

joule

4190.02

kilowatt-hour

kW·h

joule

3600000

quad (IT)

quad

joule

1.05506E+18

therm (EC)

therm

joule

105506000

therm (U.S.)

therm

joule

105480400

ton-of-coal-equivalent

TOC

joule

29307600000

ton-of-oil-equivalent

TOE

joule

41868000000

ton-of-TNT-equivalent

tTNT

joule

4184000000

watt-hour

W·h

joule

3600

watt-second

W·s

joule

References/ Further Reading

The National Institute of Standards and Technology (NIST) - The NIST Guide for the use of the International System of Units - Appendix B, subsections B.8 Factors for Units Listed Alphabetically and B.9 Factors for units listed by kind of quantity or field of science.

Lide, David R., Daniel (Editor-in-Chief). CRC Handbook of Chemistry and Physics, 89th Edition New York, NY: CRC Press, p. 1-28, 2008.

Wikipedia contributors. "Conversion of units" Wikipedia, The Free Encyclopedia. Wikipedia, The Free Encyclopedia, last visited 26 Jun. 2011.

How Many? A dictionary of units of measurement at http://www.ibiblio.org/units/ accessed 2023-07-25