426 Btu to Joules

426 Btu ≈ 4.4945e+5 J

Calculation: J = 426 Btu × 1055.06 ≈ 4.4945e+5 J

Btu to Joule Converter

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How to Convert Btu to Joule

1 Btu = 1055.06 Joules

Joule = Btu × 1055.06

Example: 426 Btu × 1055.06 = 449450 J

Reverse Conversion

To convert Joules back to Btu:

  • Remember, 1 joule equals 0.000947817 Btu.
  • To convert 449450 J to Btu, multiply 449450 x 0.000947817, resulting in 426 Btu.

426 Btu is also equal to:

  • 449.45 kilojoule
  • 0.12485 kilowatt hour
  • 107.42 calorie (nutritional)
  • 124.85 watt hour
About these units

Btu: British thermal unit (IT) — legacy heat unit based on heating water.

Joule: SI unit of energy: 1 J = 1 N·m = 1 kg·m²·s⁻².

Frequently Asked Questions

How much is 426 Btu in Joules?

426 Btu equals 449450 Joules. This is calculated by multiplying 426 by the conversion factor 1055.06.

What does 426 Btu look like in Joules?

426 Btu (449450 Joules) is heating a cup of water — a kettle uses about 300 Btu.

How do you calculate 426 Btu to Joules?

Multiply 426 by the conversion factor 1055.06. The calculation is 426 × 1055.06 = 449450 Joules. This factor is defined by international measurement standards.

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426 Btu = 449454 Joules
426 Btu = 449454 Joules — conversion chart

For general conversions between Btu and Joules, see the Btu to Joules converter.

Also convert Btu to:

Conversion factors verified against NIST, BIPM, ISO 80000-4 1 cal_IT = 4.1868 J by definition (BIPM/ITS-90). Last reviewed: April 2026
Adilson Fernandes By Adilson Fernandes
Tiago Fernandes Reviewed by Tiago Fernandes

All unit conversions on CoolConversion use conversion factors defined or documented by internationally recognised standards bodies (such as ISO and NIST), including both SI and non-SI units.