How do I convert BTU (IT) to Joule (J)?

1 btu equals 1055.055853 j using SI-based conversion and precise factors.

What is the formula to convert BTU (IT) to Joule (J)?

This is a linear unit conversion using a constant factor between units.

Yes, it uses exact definitions or standardized constants (e.g., 1 in = 25.4 mm).

Use the shareable URL pattern: /convert/btu-to-j/1

Category: Energy

Value From To Precision

1055.055853 j

1 btu = 1055.055853 j

High-precision rounding: 6 decimals

We convert by pivoting through the SI base unit for Energy and applying exact factors where applicable.

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Energy is capacity to do work; joules, calories, Wh and BTU are common.

British thermal unit (BTU)

≈ 1,055.06 J (IT).

History: Steam age heat unit; HVAC standard.

Joule (J)

SI energy unit; N·m.

History: Named after James Prescott Joule.