BTU (International) to Kilocalorie (kcal)

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Result

0.2522

kcal

Conversion rate: 1 BTU = 0.2522 kcal

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: kilocalorie (kcal)s = btu (international) × 0.2522

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

Conversion Table

BTU (International) Kilocalorie (kcal)
1 BTU 0.2522 kcal
10 BTU 2.5216 kcal
100 BTU 25.2164 kcal
1000 BTU 252.1644 kcal
1000000 BTU 252164.4007 kcal

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.

Kilocalorie (kcal)

The kilocalorie, symbolized as kcal, equals 1,000 calories and is often referred to as a “Calorie” with a capital C in food labeling. It measures the energy in food and human metabolism, helping dieticians, nutritionists, and consumers track intake. The kilocalorie became the standard unit of energy measurement as nutrition science linked energy measurement to diet. Most scientists now use joules, but kilocalories are still commonly used in reporting food energy.

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