How many British thermal units are in one joule?

There are 0.000947817 British thermal units in 1 joule.

How do you convert British thermal units to joules?

Multiply the number of British thermal units by 1,055.05585 — or use the formula J = BTU × 1,055.05585.

What is 6 British thermal units in joules?

6 British thermal units is 6,330.33512 joules. 6 × 1,055.05585 = 6,330.33512 joules.

Is the British thermal units to joules conversion exact?

The factor 1,055.05585262 is a rounded value because at least one of these units is defined by measurement rather than by an exact definition.

British Thermal Units to Joules Converter

Convert British thermal units to joules instantly with this free British thermal units to joules converter. Enter any value to get an accurate energy conversion, plus the formula, the conversion factor and a full reference table.

What is 1 British thermal unit in joules?

1 British thermal unit is equal to 1,055.05585 joules.

1 × 1,055.05585 = 1,055.05585 joules

Amount

Result1,055.055853

1 British thermal unit = 1,055.055853 joules

British thermal units to Joules formula

J = BTU × 1,055.05585

The British thermal units to joules conversion factor is 1,055.05585262 (rounded). 1 British thermal unit = 1,055.05585262 joules, and 1 joule = 0.00094781712 British thermal units.

Worked examples

2 British thermal units = 2,110.11171 joules — 2 × 1,055.05585 = 2,110.11171 joules
6 British thermal units = 6,330.33512 joules — 6 × 1,055.05585 = 6,330.33512 joules
10 British thermal units = 10,550.5585 joules — 10 × 1,055.05585 = 10,550.5585 joules

British thermal units to Joules conversion table

Every value below is calculated with the exact conversion factor and rounded for display.

British thermal units to joules conversion table
British thermal units (BTU)	Joules (J)
1 BTU	1,055.0559 J
2 BTU	2,110.1117 J
3 BTU	3,165.1676 J
4 BTU	4,220.2234 J
5 BTU	5,275.2793 J
6 BTU	6,330.3351 J
7 BTU	7,385.391 J
8 BTU	8,440.4468 J
9 BTU	9,495.5027 J
10 BTU	10,550.559 J
12 BTU	12,660.67 J
15 BTU	15,825.838 J
20 BTU	21,101.117 J
25 BTU	26,376.396 J
30 BTU	31,651.676 J
50 BTU	52,752.793 J
75 BTU	79,129.189 J
100 BTU	105,505.59 J
500 BTU	527,527.93 J
1,000 BTU	1,055,055.9 J

When you need to convert British thermal units to joules

Comparing food energy labelled in calories with labels in kilojoules.
Reading utility bills and appliance ratings that mix kWh, joules and BTU.

Common mistakes to avoid

Dividing when you should multiply. Because 1 British thermal unit = 1,055.06 joules, the answer should be larger than the number you started with.
Rounding too early. Convert first at full precision, then round the final answer to the precision the task actually needs.

How precise does the answer need to be?

Round only at the end, and only to the precision your task actually needs. The converter above keeps full double precision internally and rounds for display.

How these units are defined

British thermal unit (BTU): The heat needed to raise one pound of water by 1 °F; used for HVAC in the US. The accepted value is a measured or conventional figure rather than an exact definition, so the factor shown is rounded.
Joule (J): The SI unit of energy: one newton-meter. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.

Frequently asked questions

What is 1 British thermal unit in joules?: 1 British thermal unit is equal to 1,055.05585 joules.
How many British thermal units are in one joule?: There are 0.000947817 British thermal units in 1 joule.
How do you convert British thermal units to joules?: Multiply the number of British thermal units by 1,055.05585 — or use the formula J = BTU × 1,055.05585.
What is 6 British thermal units in joules?: 6 British thermal units is 6,330.33512 joules. 6 × 1,055.05585 = 6,330.33512 joules.
Is the British thermal units to joules conversion exact?: The factor 1,055.05585262 is a rounded value because at least one of these units is defined by measurement rather than by an exact definition.