UnitsConverter

British Thermal Unit to Kilojoule Converter

Convert BTUs to kilojoules with our free online energy converter.

Quick Answer

1 British Thermal Unit = 1.05506 kilojoules

Formula: British Thermal Unit × conversion factor = Kilojoule

Use the calculator below for instant, accurate conversions.

Our Accuracy Guarantee

All conversion formulas on UnitsConverter.io have been verified against NIST (National Institute of Standards and Technology) guidelines and international SI standards. Our calculations are accurate to 10 decimal places for standard conversions and use arbitrary precision arithmetic for astronomical units.

Last verified: November 2025Reviewed by: Sam Mathew, Software Engineer

British Thermal Unit to Kilojoule Calculator

How to Use the British Thermal Unit to Kilojoule Calculator:

  1. Enter the value you want to convert in the 'From' field (British Thermal Unit).
  2. The converted value in Kilojoule will appear automatically in the 'To' field.
  3. Use the dropdown menus to select different units within the Energy category.
  4. Click the swap button (⇌) to reverse the conversion direction.
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How to Convert British Thermal Unit to Kilojoule: Step-by-Step Guide

Converting British Thermal Unit to Kilojoule involves multiplying the value by a specific conversion factor, as shown in the formula below.

Formula:

kJ = BTU × 1.05506

Example Calculation:

1 BTU = 1.05506 kJ

Disclaimer: For Reference Only

These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.

Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.

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📋 Unit Symbols

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Conversion Table: British Thermal Unit to Kilojoule

British Thermal Unit (BTU)Kilojoule (kJ)
0.50.528
11.055
1.51.583
22.11
55.275
1010.551
2526.377
5052.753
100105.506
250263.765
500527.53
1,0001,055.06

People Also Ask

How do I convert British Thermal Unit to Kilojoule?

To convert British Thermal Unit to Kilojoule, enter the value in British Thermal Unit in the calculator above. The conversion will happen automatically. Use our free online converter for instant and accurate results. You can also visit our energy converter page to convert between other units in this category.

Learn more →

What is the conversion factor from British Thermal Unit to Kilojoule?

The conversion factor depends on the specific relationship between British Thermal Unit and Kilojoule. You can find the exact conversion formula and factor on this page. Our calculator handles all calculations automatically. See the conversion table above for common values.

Can I convert Kilojoule back to British Thermal Unit?

Yes! You can easily convert Kilojoule back to British Thermal Unit by using the swap button (⇌) in the calculator above, or by visiting our Kilojoule to British Thermal Unit converter page. You can also explore other energy conversions on our category page.

Learn more →

What are common uses for British Thermal Unit and Kilojoule?

British Thermal Unit and Kilojoule are both standard units used in energy measurements. They are commonly used in various applications including engineering, construction, cooking, and scientific research. Browse our energy converter for more conversion options.

For more energy conversion questions, visit our FAQ page or explore our conversion guides.

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Verified Against Authority Standards

All conversion formulas have been verified against international standards and authoritative sources to ensure maximum accuracy and reliability.

NIST Reference on Constants, Units and Uncertainty

National Institute of Standards and Technology — Fundamental physical constants and unit conversions

BIPM SI Units

Bureau International des Poids et Mesures — International System of Units (SI) definitions and standards

ISO 80000

International Organization for Standardization — Quantities and units international standards series

Last verified: November 14, 2025