Watt Hour to Terajoule Converter

A watt-hour (Wh) is a unit of energy equal to the energy consumed by a device with a power rating of one watt operating for one hour. It equals 3,600 joules and is commonly used for measuring energy in small electronic devices.

The watt-hour developed alongside electrical technology as a convenient way to measure energy consumption in smaller electrical devices. It became particularly important with the rise of portable electronics and battery-powered devices where kilowatt-hours would be impractically large.

Watt-hours are commonly used for measuring battery capacity in portable electronics, energy consumption of small appliances, and in renewable energy systems for small-scale applications. They're standard for smartphone batteries, laptop batteries, and small solar power systems.

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.