684 Btu to Joules

684 Btu ≈ 7.2166e+5 J

Calculation: J = 684 Btu × 1055.06 ≈ 7.2166e+5 J

Btu to Joule Converter

Choose the type of measurement to convert
Select the source unit to convert from
Select the target unit to convert to
Enter a numeric value or fraction to convert
Sig. Figures:

How to Convert Btu to Joule

1 Btu = 1055.06 Joules

Joule = Btu × 1055.06

Example: 684 Btu × 1055.06 = 721660 J

Reverse Conversion

To convert Joules back to Btu:

  • Remember, 1 joule equals 0.000947817 Btu.
  • To convert 721660 J to Btu, multiply 721660 x 0.000947817, resulting in 684 Btu.

684 Btu is also equal to:

  • 721.66 kilojoule
  • 0.20046 kilowatt hour
  • 172.48 calorie (nutritional)
  • 200.46 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 684 Btu in Joules?

684 Btu equals 721660 Joules. This is calculated by multiplying 684 by the conversion factor 1055.06.

What does 684 Btu look like in Joules?

684 Btu (721660 Joules) is heating a cup of water — a kettle uses about 300 Btu.

How do you calculate 684 Btu to Joules?

Multiply 684 by the conversion factor 1055.06. The calculation is 684 × 1055.06 = 721660 Joules. This factor is defined by international measurement standards.

Share This Calculation

684 Btu = 721658 Joules
684 Btu = 721658 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.