BTU to Terajoule Converter

A British Thermal Unit (BTU) is a unit of energy equal to approximately 1,055 joules. It represents the amount of energy needed to raise the temperature of one pound of water by one degree Fahrenheit at standard atmospheric pressure.

The BTU was developed in the 19th century as part of the British Imperial system for measuring heat energy. It became standard in heating, ventilation, and air conditioning (HVAC) applications in countries using imperial units, particularly for rating heating and cooling equipment capacity.

BTUs are extensively used in the United States for HVAC system ratings, heating and cooling equipment specifications, and energy content of fuels. They're standard for furnace output ratings, air conditioner capacity, water heater specifications, and natural gas energy content measurements.

A terajoule (TJ) is a unit of energy equal to one trillion joules (10¹² J). It represents enormous amounts of energy, typically used for measuring energy consumption of large cities, industrial processes, or natural phenomena.

The terajoule emerged as energy consumption and production reached massive scales in the 20th century. It became necessary for describing energy in large power plants, national energy statistics, and major industrial processes where smaller units would result in unwieldy numbers.

Terajoules are used for measuring energy consumption of large cities, output of major power plants, industrial energy usage, and in energy policy and planning. They're standard in national energy statistics, large-scale renewable energy projects, and major industrial facility energy audits.