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BTU to Joule

BTU
Joule (J)
J

J = BTU × 1055.06

Quick Reference: BTU to Joule

BTUJ
1010,550.6
2526,376.5
5052,753
100105,506
250263,765
500527,530

How to Convert BTU to Joule

Formula:

J = BTU × 1055.06

Example:

100 BTU = 105,506 J

  1. Enter the value in BTU you want to convert
  2. The result is calculated automatically
  3. Copy your result in Joule or continue converting

About BTU and Joule

British Thermal Units (BTU) measure heat energy, commonly used in heating and cooling systems in the US. One BTU equals approximately 1,055 joules. BTU represents the energy needed to heat one pound of water by one degree Fahrenheit.

Common Uses for This Conversion

HVAC system sizing, comparing air conditioner capacities, understanding furnace ratings, and energy efficiency calculations for heating equipment.

💡Did You Know?

Air conditioners are rated in BTU/h—a 12,000 BTU/h unit can remove 12,000 BTU of heat per hour, equivalent to 1 ton of refrigeration (the cooling power of melting one ton of ice in 24 hours).

Frequently Asked Questions

To convert calories to joules, multiply by 4.184. One calorie equals exactly 4.184 joules. For food calories (kcal), multiply by 4,184. For example, 100 calories = 418.4 joules, and 100 kcal = 418,400 joules.
A lowercase calorie (cal) is a small calorie, equal to 4.184 joules. An uppercase Calorie (Cal) or kilocalorie (kcal) is 1,000 small calories. Food labels typically use kilocalories (kcal), often written as Calories in the US.
To convert kilowatt-hours (kWh) to joules, multiply by 3,600,000 (3.6 × 10⁶). One kWh = 3.6 megajoules. For example, 1 kWh of electricity equals 3,600,000 joules of energy.
A BTU (British Thermal Unit) is the energy needed to raise 1 pound of water by 1°F. One BTU equals approximately 1,055.06 joules. BTUs are commonly used for heating/cooling systems in the US, while most of the world uses joules or kilojoules.

Related Conversions

Calorie → JouleKilowatt-hour → Joule

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