Energy conversion factors

Scroll down for more tables

See also: power conversion factors

Multiply units of left column by factor to get units in top row, for example, 1 Btu = 1055.1 joules.

 

Btu

calories

electron volts

ergs

foot-lbf

joules

Btu

1.0000E+00

2.5200E+02

6.5851E+21

1.0551E+10

7.7817E+02

1.0551E+03

calories

3.9683E-03

1.0000E+00

2.6132E+19

4.1868E+07

3.0880E+00

4.1868E+00

electron volts

1.5186E-22

3.8268E-20

1.0000E+00

1.6022E-12

1.1817E-19

1.6022E-19

ergs

9.4782E-11

2.3885E-08

6.2415E+11

1.0000E+00

7.3756E-08

1.0000E-07

foot-lbf

1.2851E-03

3.2383E-01

8.4623E+18

1.3558E+07

1.0000E+00

1.3558E+00

joules

9.4782E-04

2.3885E-01

6.2415E+18

1.0000E+07

7.3756E-01

1.0000E+00

kilojoules

9.4782E-01

2.3885E+02

6.2415E+21

1.0000E+10

7.3756E+02

1.0000E+03

kilowatt-hours

3.4121E+03

8.5985E+05

2.2469E+25

3.6000E+13

2.6552E+06

3.6000E+06

megajoules

9.4782E+02

2.3885E+05

6.2415E+24

1.0000E+13

7.3756E+05

1.0000E+06

therms

1.0000E+05

2.5200E+07

6.5851E+26

1.0551E+15

7.7817E+07

1.0551E+08

ton-hours

1.2000E+04

3.0240E+06

7.9021E+25

1.2661E+14

9.3381E+06

1.2661E+07

watt-hours

3.4121E+00

8.5985E+02

2.2469E+22

3.6000E+10

2.6552E+03

3.6000E+03

 

 

kilojoules

kilowatt-hours

megajoules

therms

ton-hours

watt-hours

Btu

1.0551E+00

2.9307E-04

1.0551E-03

1.0000E-05

8.3333E-05

2.9307E-01

calories

4.1868E-03

1.1630E-06

4.1868E-06

3.9683E-08

3.3069E-07

1.1630E-03

electron volts

1.6022E-22

4.4505E-26

1.6022E-25

1.5186E-27

1.2655E-26

4.4505E-23

ergs

1.0000E-10

2.7778E-14

1.0000E-13

9.4782E-16

7.8985E-15

2.7778E-11

foot-lbf

1.3558E-03

3.7662E-07

1.3558E-06

1.2851E-08

1.0709E-07

3.7662E-04

joules

1.0000E-03

2.7778E-07

1.0000E-06

9.4782E-09

7.8985E-08

2.7778E-04

kilojoules

1.0000E+00

2.7778E-04

1.0000E-03

9.4782E-06

7.8985E-05

2.7778E-01

kilowatt-hours

3.6000E+03

1.0000E+00

3.6000E+00

3.4121E-02

2.8434E-01

1.0000E+03

megajoules

1.0000E+03

2.7778E-01

1.0000E+00

9.4782E-03

7.8985E-02

2.7778E+02

therms

1.0551E+05

2.9307E+01

1.0551E+02

1.0000E+00

8.3333E+00

2.9307E+04

ton-hours

1.2661E+04

3.5169E+00

1.2661E+01

1.2000E-01

1.0000E+00

3.5169E+03

watt-hours

3.6000E+00

1.0000E-03

3.6000E-03

3.4121E-05

2.8434E-04

1.0000E+00