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British Thermal Unit to Kilojoule

Convert British Thermal Unit (BTU) to Kilojoule (KJ)

Please provide values below to convert British Thermal Unit (BTU) to Kilojoule (KJ).
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      Updated on September 1, 2025

      About British Thermal Unit (BTU) to Kilojoule (KJ) Conversion Calculator

      Written By
      author
      Nadiba Rahman
      Reviewed by
      author
      Mrinmoy Roy
      Share This Post
      You can use our British Thermal Unit (BTU) to Kilojoule (KJ) conversion calculator as a reliable and efficient tool to simplify energy conversions. It is designed for professionals, students, and anyone who needs a quick and accurate result. Conversion of British Thermal Unit (BTU) to Kilojoule (KJ) is crucial in Heating, Energy related measurements. You can avoid the risk of manual calculation errors and save valuable time using our British Thermal Unit (BTU) to Kilojoule (KJ) converter.

      Relation Between British Thermal Unit (BTU) and Kilojoule (KJ)

      Let me explain to you about the relation between British Thermal Unit BTU and Kilojoule (KJ) first before moving to the conversion process. Because it’s essential to grasp what these units represent.

      What is British Thermal Unit (BTU)?

      A British Thermal Unit is the amount of heat energy required to raise the temperature of one pound of liquid water by one degree Fahrenheit. British Thermal Unit (BTU) is a unit of energy measurement which is commonly used in Heating, Energy. BTUs are commonly used in the United States and other countries that use the imperial system to measure the energy content of fuels, the efficiency of heating and cooling systems, and the energy consumption of appliances..

      What is Kilojoule (KJ)?

      British Thermal Unit (BTU) is another unit of energy measurement that is used in Physics, Chemistry. A kilojoule is a unit of energy equal to 1000 joules.. BTUs are commonly used in the United States and other countries that use the imperial system to measure the energy content of fuels, the efficiency of heating and cooling systems, and the energy consumption of appliances..

      How to Convert Kilojoule (KJ)?

      The conversion between British Thermal Unit (BTU) and Kilojoule (KJ) follows a simple formula:

      British Thermal Unit = British Thermal Unit × 1.05505585262

      Where, 1.05505585262 is the value that allows you to convert between British Thermal Unit (BTU) and Kilojoule (KJ).

      So,

      1 Kilojoule = 1.05505585262 British Thermal Unit

      And, 1 British Thermal Unit = 1/1.05505585262 Kilojoule
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      Examples of Converting British Thermal Unit (BTU) to Kilojoule (KJ)

      To convert any value from British Thermal Unit (BTU) to Kilojoule (KJ), simply multiply the amount of British Thermal Unit (BTU) by the conversion factor:

      1 Kilojoule = 1.05505585262 British Thermal Unit

      For example, if you want to convert 5 British Thermal Unit into Kilojoule and the conversion factor is 1.05505585262, then:

      5 British Thermal Unit = 5 x 1.05505585262 Kilojoule

      British Thermal Unit (BTU) to Kilojoule (KJ) Conversion Chart

      Here’s a quick reference chart for common conversions between British Thermal Unit (BTU) and Kilojoule (KJ)
      British Thermal Unit (BTU)Kilojoule (KJ)
      10 British Thermal Unit (BTU)10.5505585262 Kilojoule (KJ)
      20 British Thermal Unit (BTU)21.1011170524 Kilojoule (KJ)
      30 British Thermal Unit (BTU)31.6516755786 Kilojoule (KJ)
      40 British Thermal Unit (BTU)42.2022341048 Kilojoule (KJ)
      50 British Thermal Unit (BTU)52.752792631 Kilojoule (KJ)
      60 British Thermal Unit (BTU)63.3033511572 Kilojoule (KJ)
      70 British Thermal Unit (BTU)73.8539096834 Kilojoule (KJ)
      80 British Thermal Unit (BTU)84.4044682096 Kilojoule (KJ)
      90 British Thermal Unit (BTU)94.9550267358 Kilojoule (KJ)
      100 British Thermal Unit (BTU)105.505585262 Kilojoule (KJ)
      You can use the above chart for quick and easy reference.

      How 1 British Thermal Unit (BTU) Converts to Other energy Units

      See the relation between British Thermal Unit (BTU) and other energy related measurement units:
      1 British Thermal Unit(BTU)252.000000 Calorie (cal)
      1 British Thermal Unit(BTU)105505585.262000 Erg (erg)
      1 British Thermal Unit(BTU)6.5815e+21 Electronvolt (ev)
      1 British Thermal Unit(BTU)0.000000 Exajoule (EJ)
      1 British Thermal Unit(BTU)778.000000 Foot-pound (ft lbs)
      1 British Thermal Unit(BTU)0.000000 Gigajoule (GJ)
      1 British Thermal Unit(BTU)0.000000 Gigawatt-hour (GWh)
      1 British Thermal Unit(BTU)1055.055853 Joule (J)
      1 British Thermal Unit(BTU)0.252000 Kilocalorie (KCal)
      1 British Thermal Unit(BTU)0.001055 Megajoule (MJ)
      1 British Thermal Unit(BTU)0.000000 Megawatt-hour (MWh)
      1 British Thermal Unit(BTU)0.001000 Natural Gas Low Heating Value (NG LHV)
      1 British Thermal Unit(BTU)1055.055853 Newton-meter (Nm)
      1 British Thermal Unit(BTU)0.000010 Therms
      1 British Thermal Unit(BTU)0.293071 Watt-hour (Wh)
      1 British Thermal Unit(BTU)0.000293 Kilowatt-hour (kwh)
      1 British Thermal Unit(BTU)1055.055853 Watt-second (Ws)

      Features of Our British Thermal Unit (BTU) to Kilojoule (KJ) Conversion Calculator

      Our British Thermal Unit BTU to Kilojoule (KJ) converter is more than just a basic converter. Here's what makes it stand out:

      Output Precision Control

      You can control how precise your conversion results are. From settings, you can adjust decimal places from 0 to 12 places.

      Customizable Rounding Options

      You can control the output rounding options based on your necessity. You can turn the rounding mode on or off, and select between Ceiling or Floor rounding to match your needs.

      Multiple Number Formats

      Display your results the way you want:
      1. Standard format (e.g. 12.345245)
      2. Scientific notation (e.g. 1.23452e+1)
      3. Engineering format (e.g. 1.23452 × 10^1)

      Integrated Scientific Calculator

      We know you need to switch between a unit converter and a general calculator back and forth. To minimize your hassle, our British Thermal Unit BTU to Kilojoule (KJ) converter comes up with an integrated scientific calculator.

      Conversion History Tracking

      You can always review your past energy conversions and go to them whenever you like. It stores your most recent 10 unit conversions.

      Thousand Separators Toggle

      Our British Thermal Unit BTU to Kilojoule (KJ) converter improves the output readability by toggling the thousand separators “On”. It’s useful when you work with large numbers.

      Conclusion

      Now, you understand how to convert British Thermal Unit BTU to Kilojoule (KJ) manually. But you can bypass the manual calculation using our energy conversion calculator. This allows you to get faster and accurate results in Kilojoule (KJ), which you can use in Heating, Energy related measurements. With the help of our integrated scientific calculator, calculation history tracking, and precision control, our British Thermal Unit BTU to Kilojoule (KJ) converter is your swiss army knife for daily calculations.
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