How is energy measured in kilowatt-hours (kWh)?

Energy is measured in kilowatt-hours (kWh) by expressing the amount of power consumed over a specific amount of time. The formula for calculating energy in terms of power and time can be represented as follows:

Energy (in kilowatt-hours) = Power (in kilowatts) × Time (in hours).

This relationship indicates that if you have a device that draws a certain amount of power, the total energy used is determined by how long that device operates. For instance, a 1 kilowatt (kW) appliance running for 1 hour will consume 1 kWh of energy.

Understanding this measurement is essential for managing energy consumption, as it reflects how utilities charge customers based on the energy they use over time.