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Convert British thermal units to joules (BTU to J)

Type a value in British thermal units or in joules: the other field updates as you type. Below you will find the formula, a worked example and a BTU to J chart.

Updated on

1 BTU = 1,055.06 J

How to convert British thermal units to joules

Formula: J = BTU × 1,055.06

Worked example: 10,000 BTU → 10,000 × 1,055.06 = 10,550,559 J

British thermal units to joules conversion chart

British thermal units (BTU)Joules (J)
1 BTU1,055.06 J
2 BTU2,110.11 J
3 BTU3,165.17 J
4 BTU4,220.22 J
5 BTU5,275.28 J
6 BTU6,330.34 J
7 BTU7,385.39 J
8 BTU8,440.45 J
9 BTU9,495.5 J
10 BTU10,550.6 J
12 BTU12,660.7 J
15 BTU15,825.8 J
20 BTU21,101.1 J
25 BTU26,376.4 J
30 BTU31,651.7 J
40 BTU42,202.2 J
50 BTU52,752.8 J
75 BTU79,129.2 J
100 BTU105,506 J
250 BTU263,764 J
500 BTU527,528 J
1,000 BTU1,055,056 J

What is a British thermal unit?

The British thermal unit, about 1,055 joules, is the heat needed to warm one pound of water by one degree Fahrenheit. US furnaces, water heaters, grills and natural gas are rated in BTU.

What is a joule?

The joule is the SI unit of energy: the work done by a force of one newton over one meter, or one watt for one second. It is small; lifting an apple about one meter takes roughly one joule.

Frequently asked questions

How many joules are in a British thermal unit?

A British thermal unit equals 1,055.06 joules. To convert any value, multiply the number of British thermal units by 1,055.06.

How do you convert British thermal units to joules?

Use the formula J = BTU × 1,055.06. Example: 10,000 BTU → 10,000 × 1,055.06 = 10,550,559 J.

How many British thermal units are in a joule?

A joule equals 0.000947817 British thermal units. That is the reverse conversion, from joules to British thermal units.

Results are rounded to 6 significant digits; the conversion factors are the exact legal definitions.

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