British thermal units to Joules Converter (BTU to J)

British thermal units

The British thermal unit (BTU) is a unit of energy approximately equal to 1,055.06 joules, defined as the energy required to raise the temperature of one pound of water by one degree Fahrenheit. It remains the standard unit for heating and cooling capacity in HVAC systems in the United States: air conditioners and furnaces are rated in BTU/hour. A typical residential air conditioner is rated at 5,000–24,000 BTU/h. One BTU equals approximately 0.000293 kWh.

Joules

The joule (J) is the SI derived unit of energy, work, and heat, defined as the work done when a force of one newton displaces an object by one metre (J = N·m = kg·m²·s⁻²). Named after James Prescott Joule, who established the mechanical equivalent of heat in the 1840s, the joule unifies all forms of energy — mechanical, thermal, electrical, chemical, and nuclear — under one framework. One joule is small: lifting an apple (≈100 g) one metre requires about 1 joule, while a human at rest metabolises approximately 80 joules per second.

British thermal units (BTU) to Joules (J) - Conversion Table
British thermal units (BTU)	Joules (J)
0.1 BTU	105.5056 J
1 BTU	1,055.0559 J
2 BTU	2,110.1117 J
3 BTU	3,165.1676 J
5 BTU	5,275.2793 J
10 BTU	10,550.5585 J
20 BTU	21,101.1171 J
30 BTU	31,651.6756 J
50 BTU	52,752.7926 J
100 BTU	105,505.5853 J
1000 BTU	1,055,055.8526 J

Frequently Asked Questions (FAQ)

How many joules are in 1 British thermal units?

1 British thermal units (BTU) is exactly 1,055.06 joules (J).

How do I convert British thermal units to joules?

Multiply the value in British thermal units by 1,055.06 to get the result in joules. Or use the converter above — type any number and see the result instantly.

Convert British thermal units (BTU) to other units of Energy

Conversions from British thermal units
‣ British thermal units (BTU) to Joules (J)
‣ British thermal units (BTU) to Kilojoules (kJ)
‣ British thermal units (BTU) to Megajoules (MJ)
‣ British thermal units (BTU) to Calories (cal)
‣ British thermal units (BTU) to Kilocalories (kcal)
‣ British thermal units (BTU) to Watt-hours (W·h)
‣ British thermal units (BTU) to Kilowatt-hours (kW·h)
‣ British thermal units (BTU) to British thermal units (BTU)
‣ British thermal units (BTU) to Electronvolts (eV)
‣ British thermal units (BTU) to Ergs (erg)

Conversions to British thermal units
‣ Joules (J) to British thermal units (BTU)
‣ Kilojoules (kJ) to British thermal units (BTU)
‣ Megajoules (MJ) to British thermal units (BTU)
‣ Calories (cal) to British thermal units (BTU)
‣ Kilocalories (kcal) to British thermal units (BTU)
‣ Watt-hours (W·h) to British thermal units (BTU)
‣ Kilowatt-hours (kW·h) to British thermal units (BTU)
‣ British thermal units (BTU) to British thermal units (BTU)
‣ Electronvolts (eV) to British thermal units (BTU)
‣ Ergs (erg) to British thermal units (BTU)