BTU (International) to Kilojoule

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Result

1.0551

kJ

Conversion rate: 1 BTU = 1.0551 kJ

Showing up to 4 decimal

How it works

The converter uses exact SI-based factors (e.g., 1 foot = 0.3048 meters, 1 inch = 0.0254 meters).

Formula: kilojoules = btu (international) × 1.0551

Results show between 0 and 8 decimal places and hide trailing zeros for readability.

Conversion Table

BTU (International) Kilojoule
1 BTU 1.0551 kJ
10 BTU 10.5506 kJ
100 BTU 105.5056 kJ
1000 BTU 1055.0559 kJ
1000000 BTU 1055055.8526 kJ

History

BTU (International) (BTU)

The British Thermal Unit (BTU), symbolized as BTU, is an imperial unit of energy used to measure heat. One BTU is the heat needed to raise one pound of water by 1°F. The BTU originated in the 19th century, during the Industrial Revolution, for heating in the UK and the US. It is still used in HVAC systems and energy production. The BTU connects imperial and metric energy systems, especially in countries that use imperial units for industry.

Kilojoule (kJ)

The kilojoule, symbol kJ, equals 1,000 joules and is used for measuring larger quantities of energy. It was introduced to simplify calculations in nutrition, physics, and engineering, where joules alone would result in very large numbers. Kilojoules are commonly used to express the energy content of foods, fuel consumption, and industrial energy usage. The adoption of the kilojoule has standardized energy measurements across scientific disciplines and commercial applications, offering clarity and ease of use in both everyday and professional contexts.

Other Relevant Conversions

J → kJ J → cal J → kcal J → Wh J → kWh J → eV J → BTU kJ → J kJ → cal kJ → kcal kJ → Wh kJ → kWh kJ → eV kJ → BTU cal → J cal → kJ cal → kcal cal → Wh cal → kWh cal → eV cal → BTU kcal → J kcal → kJ kcal → cal kcal → Wh kcal → kWh kcal → eV kcal → BTU Wh → J Wh → kJ Wh → cal Wh → kcal Wh → kWh Wh → eV Wh → BTU kWh → J kWh → kJ kWh → cal kWh → kcal kWh → Wh kWh → eV kWh → BTU eV → J eV → kJ eV → cal eV → kcal eV → Wh eV → kWh eV → BTU BTU → J BTU → kJ BTU → cal BTU → kcal BTU → Wh BTU → kWh BTU → eV