At One Place

British thermal units to joules

1 British thermal unit in joules
1 BTU = 1,055.0559 J
J = BTU × 1,055.055853

To convert British thermal units to joules, multiply by 1,055.055853. The table below gives the values people look up most often, and the converter works for any number.

British thermal units to joules table

Common British thermal unit values converted to joules.
British thermal units Joules
1 BTU 1,055.0559
2 BTU 2,110.1117
3 BTU 3,165.1676
4 BTU 4,220.2234
5 BTU 5,275.2793
10 BTU 10,550.559
15 BTU 15,825.838
20 BTU 21,101.117
25 BTU 26,376.396
30 BTU 31,651.676
40 BTU 42,202.234
50 BTU 52,752.793
75 BTU 79,129.189
100 BTU 105,505.59
250 BTU 263,763.96
500 BTU 527,527.93
1,000 BTU 1,055,055.9

How the conversion works

The relationship is J = BTU × 1,055.055853. Both units measure energy, so the conversion is a fixed factor that never changes.

Common questions

How many joules are in one British thermal unit?
One British thermal unit equals 1,055.0559 joules. J = BTU × 1,055.055853.
How do you convert British thermal units to joules?
Use J = BTU × 1,055.055853. So 10 BTU is 10,550.559 J.
How many British thermal units are in one joule?
One joule equals 0.0009478 British thermal units, which is the reverse of the conversion above.

Related pages

Sources

  1. Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
  2. The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
  3. Calculated on this page — At One Place

How these figures are compiled and checked