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    Energy Conversion

    1 Kilojoule to BTU (th)

    Quick answer

    1 Kilojoule (kJ) equals

    0.948452 BTU

    To convert 1 Kilojoules to BTU (th)s, multiply by 0.9484516527. Therefore, 1 Kilojoule (kJ) equals 0.948452 BTU (th) (BTU).

    Formula: BTU = kJ × 0.9484516527. Calculation: 1 × 0.9484516527 = 0.948452 BTU.

    Convert Kilojoule (kJ) to BTU (th) (BTU) online with our free unit converter. In energy, 1 kJ = 0.948452 BTU. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.

    Worked example: converting Kilojoule to BTU (th)

    1. Step 1 — start with the formula. BTU = kJ × 0.9484516527
    2. Step 2 — substitute your figure. 1 kJ × 0.9484516527
    3. Step 3 — read the result. 1 kJ = 0.948452 BTU
    4. Step 4 — check it in reverse. kJ = BTU × 1.05435 returns 1 kJ, which matches the figure you started with.

    Energy Converter

    27 units available

    Decimals:
    0.948452

    1 kJ = 0.948452 BTU

    Formula:

    BTU = kJ × 0.9484516527

    With your value: 1 kJ = 0.94845165 BTU

    How big is that?

    Everyday references on a logarithmic scale, all expressed in kilojoule so you can sanity-check the result.

    Heartbeat (1/1.0e+3 your value)0.00100 kJ
    Your value1.00 kJ
    AA battery charge (10× your value)10.0 kJ
    Slice of bread (2.8e+2× your value)280 kJ
    Daily food intake (8.4e+3× your value)8.40e+3 kJ
    Litre of petrol (3.4e+4× your value)3.42e+4 kJ

    Other Kilojoule to BTU (th) conversions

    2 kJ to BTU3 kJ to BTU4 kJ to BTU5 kJ to BTU6 kJ to BTU7 kJ to BTU8 kJ to BTUFull Kilojoule to BTU (th) converter

    Kilojoule to BTU (th) Conversion Table

    Kilojoule (kJ)BTU (th) (BTU)
    0.50.474226
    10.948452
    21.896903
    54.742258
    109.484517
    1514.226775
    2018.969033
    2523.711291
    5047.422583
    10094.845165
    250237.112913
    500474.225826
    1000948.451653

    BTU (th) to Kilojoule Conversion Table

    BTU (th) (BTU)Kilojoule (kJ)
    0.50.527175
    11.05435
    22.1087
    55.27175
    1010.5435
    1515.81525
    2021.087
    2526.35875
    5052.7175
    100105.435
    250263.5875
    500527.175
    10001,054.35

    Where these values come from

    Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

    Kilojoule (kJ)

    Energy

    Exact conversion

    Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

    Source: NIST Special Publication 811, Guide for the Use of the International System of Units

    National Institute of Standards and Technology (US) · Reviewed 2026-07-01

    BTU (th) (BTU)

    Energy

    Exact conversion

    The International Table BTU is exactly 1055.055 852 62 J.

    Thermochemical and 39 °F BTU definitions differ by up to 0.2 %.

    Source: NIST Special Publication 811, Guide for the Use of the International System of Units

    National Institute of Standards and Technology (US) · Reviewed 2026-07-01

    How to Convert Kilojoule to BTU (th)

    To convert from Kilojoule (kJ) to BTU (th) (BTU), multiply the value by 0.9484516527.

    Formula: BTU = kJ × 0.9484516527

    Reverse: kJ = BTU × 1.05435

    Step-by-Step Example

    1. Start with your value in Kilojoule. For example: 5 kJ
    2. Multiply by the conversion factor: 5 x 0.9484516527
    3. The result is: 4.742258 BTU

    Kilojoule and BTU (th) Relationship

    This conversion bridges the Metric (SI) and US Customary / Imperial measurement systems, commonly required when translating scientific data, international engineering specifications, or trade standards. Since 1 Kilojoule represents a fraction of a BTU (th) (1 BTU (th) ≈ 1.0544 Kilojoules), the BTU (th) is the larger measurement interval. Understanding the relationship between Kilojoule and BTU (th) is essential for accurate calculations in physics, engineering, commerce, and daily applications.

    About Kilojoule

    The Kilojoule (symbol: kJ) is a recognized unit in the Metric (SI) measurement framework, utilized within energy applications for precision and standardized data representation.

    Common uses of Kilojoule: energy calculations, engineering and science, education.

    About BTU (th)

    The BTU (th) (symbol: BTU) is a recognized unit in the US Customary / Imperial measurement framework, utilized within energy applications for precision and standardized data representation.

    Common uses of BTU (th): energy calculations, engineering and science, education.

    Frequently Asked Questions

    What is 1 Kilojoule in BTU (th)?
    1 Kilojoule equals 0.948452 BTU (th).
    How many BTU (th)s are in 1 Kilojoule?
    There are exactly 0.9484516527 BTU (th)s in 1 Kilojoule. This means the conversion factor from Kilojoule to BTU (th) is 0.9484516527.
    What is the formula to convert Kilojoule to BTU (th)?
    The formula to convert Kilojoule to BTU (th) is: BTU = kJ × 0.9484516527. For example, to convert 10 Kilojoules to BTU (th)s, you would multiply 10 by 0.9484516527.
    What is a Kilojoule?
    The Kilojoule (symbol: kJ) is a recognized unit in the Metric (SI) measurement framework, utilized within energy applications for precision and standardized data representation.
    What is a BTU (th)?
    The BTU (th) (symbol: BTU) is a recognized unit in the US Customary / Imperial measurement framework, utilized within energy applications for precision and standardized data representation.
    What are the common uses of Kilojoule?
    The Kilojoule is commonly used in energy calculations, engineering and science, education.

    Related Energy Conversions

    Joule → BTU (th)Kilojoule → JouleKilojoule → MegajouleKilojoule → GigajouleKilojoule → MillijouleKilojoule → Calorie (th)Kilojoule → Calorie (IT)Kilojoule → KilocalorieKilojoule → BTU (IT)

    Cite this page

    UnitConvertLab. (2026). 1 Kilojoule to BTU (th). UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/1-kilojoule-to-btu