Convert Joules to British Thermal Units

Enter the energy in joules below to get the value converted to british thermal units.

Results in British Thermal Units:
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1 J = 0.000948 BTU

How to Convert Joules to British Thermal Units

conversion scale showing joules and equivalent british thermal units energy values

To convert a joule measurement to a british thermal unit measurement, multiply the energy by the conversion ratio. One joule is equal to 0.000948 british thermal units, so use this simple formula to convert:

british thermal units = joules × 0.000948

The energy in british thermal units is equal to the joules multiplied by 0.000948.

For example, here's how to convert 5 joules to british thermal units using the formula above.
5 J = (5 × 0.000948) = 0.004739 BTU

Joules and british thermal units are both units used to measure energy. Keep reading to learn more about each unit of measure.


The joule is the energy equal to the force on an object of one newton at a distance of one meter. One joule is equal to the heat energy dissipated by the current of one ampere through one ohm of resistance for one second.

One joule is also equal to the energy needed to move an electric charge of one coulomb through a potential difference of one volt. In addition, one joule is also equal to the one watt-second.

The joule is the SI derived unit for energy in the metric system. Joules can be abbreviated as J, for example 1 joule can be written as 1 J.

British Thermal Units

British thermal units are a measure of heat energy. Specifically, one british thermal unit is equal to the amount of heat energy required to increase the temperature of one pound of water one degree Fahrenheit. They are often used as a way to rate the energy heat producing appliances such furnaces, and to price heating fuels such as natural gas.

The british thermal unit is a US customary unit of energy. British thermal units can be abbreviated as BTU, for example 1 british thermal unit can be written as 1 BTU.

Joule Measurements and Equivalent British Thermal Unit Conversions

Common joule values converted to the equivalent british thermal unit value
Joules British Thermal Units
1 J 0.000948 BTU
2 J 0.001896 BTU
3 J 0.002843 BTU
4 J 0.003791 BTU
5 J 0.004739 BTU
6 J 0.005687 BTU
7 J 0.006635 BTU
8 J 0.007583 BTU
9 J 0.00853 BTU
10 J 0.009478 BTU
11 J 0.010426 BTU
12 J 0.011374 BTU
13 J 0.012322 BTU
14 J 0.013269 BTU
15 J 0.014217 BTU
16 J 0.015165 BTU
17 J 0.016113 BTU
18 J 0.017061 BTU
19 J 0.018009 BTU
20 J 0.018956 BTU
21 J 0.019904 BTU
22 J 0.020852 BTU
23 J 0.0218 BTU
24 J 0.022748 BTU
25 J 0.023695 BTU
26 J 0.024643 BTU
27 J 0.025591 BTU
28 J 0.026539 BTU
29 J 0.027487 BTU
30 J 0.028435 BTU
31 J 0.029382 BTU
32 J 0.03033 BTU
33 J 0.031278 BTU
34 J 0.032226 BTU
35 J 0.033174 BTU
36 J 0.034121 BTU
37 J 0.035069 BTU
38 J 0.036017 BTU
39 J 0.036965 BTU
40 J 0.037913 BTU

More Joule Energy Conversions

Convert to Kilojoules
1 J is equal to 0.001 kilojoules
Convert to Megajoules
1 J is equal to 1.0E-6 megajoules
Convert to Gigajoules
1 J is equal to 1.0E-9 gigajoules
Convert to Calories
1 J is equal to 0.239006 calories
Convert to Kilocalories
1 J is equal to 0.000239 kilocalories
Convert to Megacalories
1 J is equal to 2.3901E-7 megacalories
Watts x Time
Convert to Watt-hours
1 J is equal to 0.000278 watt-hours
Convert to Kilowatt-hours
1 J is equal to 2.7778E-7 kilowatt-hours
Convert to Megawatt-hours
1 J is equal to 2.7778E-10 megawatt-hours
Convert to Watt-seconds
1 J is equal to 1 watt-seconds
Thermal Units
Convert to Million BTU
1 J is equal to 9.4782E-10 million BTU
Convert to Therms
1 J is equal to 9.4782E-9 therms
Convert to Quads
1 J is equal to 9.4782E-19 quads
Convert to Electronvolts
1 J is equal to 6,241,500,000,000,000,000 electronvolts
Convert to Kiloelectronvolts
1 J is equal to 6,241,500,000,000,000 kiloelectronvolts
Convert to Megaelectronvolts
1 J is equal to 6,241,509,343,260.2 megaelectronvolts