Convert British Thermal Units to Joules

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

Results in Joules:
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1 BTU = 1,055.055853 J

How to Convert British Thermal Units to Joules

conversion scale showing british thermal units and equivalent joules energy values

To convert a british thermal unit measurement to a joule measurement, multiply the energy by the conversion ratio. One british thermal unit is equal to 1,055.055853 joules, so use this simple formula to convert:

joules = british thermal units × 1,055.055853

The energy in joules is equal to the british thermal units multiplied by 1,055.055853.

For example, here's how to convert 5 british thermal units to joules using the formula above.
5 BTU = (5 × 1,055.055853) = 5,275.279263 J

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

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.


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 Unit Measurements and Equivalent Joule Conversions

Common british thermal unit values converted to the equivalent joule value
British Thermal Units Joules
1 BTU 1,055 J
2 BTU 2,110 J
3 BTU 3,165 J
4 BTU 4,220 J
5 BTU 5,275 J
6 BTU 6,330 J
7 BTU 7,385 J
8 BTU 8,440 J
9 BTU 9,496 J
10 BTU 10,551 J
11 BTU 11,606 J
12 BTU 12,661 J
13 BTU 13,716 J
14 BTU 14,771 J
15 BTU 15,826 J
16 BTU 16,881 J
17 BTU 17,936 J
18 BTU 18,991 J
19 BTU 20,046 J
20 BTU 21,101 J
21 BTU 22,156 J
22 BTU 23,211 J
23 BTU 24,266 J
24 BTU 25,321 J
25 BTU 26,376 J
26 BTU 27,431 J
27 BTU 28,487 J
28 BTU 29,542 J
29 BTU 30,597 J
30 BTU 31,652 J
31 BTU 32,707 J
32 BTU 33,762 J
33 BTU 34,817 J
34 BTU 35,872 J
35 BTU 36,927 J
36 BTU 37,982 J
37 BTU 39,037 J
38 BTU 40,092 J
39 BTU 41,147 J
40 BTU 42,202 J

More British Thermal Unit Energy Conversions

Convert to Kilojoules
1 BTU is equal to 1.055056 kilojoules
Convert to Megajoules
1 BTU is equal to 0.001055 megajoules
Convert to Gigajoules
1 BTU is equal to 1.0551E-6 gigajoules
Convert to Calories
1 BTU is equal to 252.164401 calories
Convert to Kilocalories
1 BTU is equal to 0.252164 kilocalories
Convert to Megacalories
1 BTU is equal to 0.000252 megacalories
Watts x Time
Convert to Watt-hours
1 BTU is equal to 0.293071 watt-hours
Convert to Kilowatt-hours
1 BTU is equal to 0.000293 kilowatt-hours
Convert to Megawatt-hours
1 BTU is equal to 2.9307E-7 megawatt-hours
Convert to Watt-seconds
1 BTU is equal to 1,055.06 watt-seconds
Thermal Units
Convert to Million BTU
1 BTU is equal to 1.0E-6 million BTU
Convert to Therms
1 BTU is equal to 1.0E-5 therms
Convert to Quads
1 BTU is equal to 1.0E-15 quads
Convert to Electronvolts
1 BTU is equal to 6,585,100,000,000,000,131,072 electronvolts
Convert to Kiloelectronvolts
1 BTU is equal to 6,585,100,000,000,000,000 kiloelectronvolts
Convert to Megaelectronvolts
1 BTU is equal to 6,585,100,000,000,000 megaelectronvolts