BTU to Joules converter

To convert BTU to joules, enter the value in the first field. The result in joules is calculated automatically using the exact conversion factor.

1 BTU = 1055.05585262 J
1 J ≈ 0.000947817120313 BTU

Formula: J = BTU × 1055.05585262
BTU ≈ J × 0.000947817120313

Definitions: 1 BTU = 1055.05585262 J

The British thermal unit (BTU) here is the International Table BTU, about 1,055 joules, roughly the energy needed to raise one pound of water by one degree Fahrenheit. It is used in the United States for heating and cooling equipment, fuel content and natural gas.

The joule (J) is the SI unit of energy and work: the energy of one newton acting over one meter, or of one watt working for one second. It is a small unit, roughly the energy needed to lift a small apple by one meter.

See the conversion table with commonly used values, handy for quick reference or study.