Gigajoule to Millijoule Converter

A gigajoule (GJ) is a unit of energy equal to one billion joules (10⁹ J). It represents large amounts of energy, commonly used for measuring building energy consumption, industrial processes, and fuel energy content.

The gigajoule became important with the growth of energy-intensive industries and the need to measure energy consumption in large buildings and facilities. It provided a convenient scale for energy auditing, HVAC system sizing, and industrial energy management in the latter half of the 20th century.

Gigajoules are commonly used in building energy analysis, HVAC engineering, industrial energy management, and fuel energy content specifications. They're standard for measuring annual energy consumption of large buildings, industrial process energy requirements, and natural gas energy content.

A millijoule (mJ) is a unit of energy equal to one thousandth of a joule (10⁻³ J). It represents small amounts of energy, typically found in electronic circuits, small mechanical systems, and precision energy measurements.

The millijoule became important with the development of precision electronics and small-scale energy measurements. It was particularly useful for measuring energy in electronic pulses, small mechanical impacts, and low-energy physical and chemical processes.

Millijoules are used in electronics for measuring pulse energy, in precision mechanics for small impact measurements, in laser technology for pulse energy, and in materials testing for small-scale energy absorption measurements.