BTU to Joules Converter
How to convert BTU To Joules
1 BTU = 1,055.06 J.
To convert btu to joules, use the formula: 1 BTU = 1,055.06 J. Enter any value in the input field above and the result appears instantly. Click the ⇄ button to reverse the conversion direction.
All conversions use precise mathematical constants validated against international SI standards (NIST and ISO 80000), accurate to 8 significant figures.
Frequently Asked Questions
How many Joules are in one BTU?
1 BTU = 1,055.06 J. 1 BTU (British Thermal Unit) = 1,055.06 joules. BTU is used in HVAC, heating and cooling ratings.
What is the formula to convert BTU to Joule?
1 BTU = 1,055.06 J. Multiply the BTU value by the conversion factor to get Joule.
How do I convert Joules To BTU?
Use the Joules To BTU converter — formula: 1 BTU = 1,055.06 J. Click the ⇄ switch button above for the reverse conversion.
Is this BTU to Joule converter free?
Yes — completely free, no registration required. Works instantly in your browser using precise mathematical constants validated against SI standards.