Terajoules

Terajoule (symbol TJ) is an SI-derived unit of energy equal to 10^12 joules. The prefix tera- denotes a trillion, so a terajoule is one trillion joules. The joule is the base SI unit for energy, and the terajoule is used for large-scale energy quantities.

Because joules are small, terajoules are used in engineering and energy statistics to express large energy amounts, such as fuel energy content, electricity generation, and national energy demand. The unit is common in reports on gas, oil, and power production.

Conversions and scale: 1 TJ = 1,000 GJ; 1 TJ ≈ 277.8 MWh (about 0.2778 GWh). In larger terms, 1 PJ = 1,000 TJ. In energy-equivalent terms, 1 TJ is roughly 23.9 tonnes of oil equivalent, depending on exact conversion factors.

Terajoules are part of the standard set of SI energy units and are widely used in industrial and governmental contexts to compare and aggregate energy flows, capacities, or reserves at national or regional scales. They provide a convenient, precise measure when gigajoules or petajoules would be unwieldy for everyday reporting.