Joule (J)
The joule is the SI unit of energy and connects mechanical work, heat, and electrical energy.
History: the joule is named after James Prescott Joule and is the SI unit of energy.
Quickly convert joules to BTU without lookup tables or manual math.
This page is focused on converting joules to BTU. Type a number into the first field and the result appears immediately in the second field.
Example: 1 J = 0.0009478171 BTU. Conversion formula: result = value × 1 / 1055.05585262.
Use this converter for everyday calculations, study notes, engineering checks, and quick value verification without installing a separate app.
The joule is the SI unit of energy and connects mechanical work, heat, and electrical energy.
History: the joule is named after James Prescott Joule and is the SI unit of energy.
BTU is used in heat engineering, air conditioning, heating, and English-language engineering tables.
History: BTU began in British heat engineering as the heat required to warm a pound of water by one degree Fahrenheit.
Enter a value in the Joule field. The converter applies the formula "result = value × 1 / 1055.05585262" and immediately shows the result in BTU.
1 J = 0.0009478171 BTU.
Yes. Use the swap button or choose the reverse pair from the full conversion list.