Kilowattóra

Kilowattóra is a unit of energy. It is commonly used for measuring electrical energy consumption. One kilowattóra, often abbreviated as kWh, is equivalent to the energy consumed by a device with a power of one kilowatt operating for one hour.

The unit is derived from the watt, the base unit of power in the International System of Units (SI). A watt is defined as one joule per second. Therefore, one kilowatt (kW) is equal to 1000 watts or 1000 joules per second. When this power is sustained for one hour, the total energy consumed is one kilowattóra.

To calculate kilowattóra consumption, one multiplies the power of an appliance in kilowatts by the duration of its use in hours. For example, a 100-watt light bulb, which is 0.1 kilowatts, used for 10 hours would consume 0.1 kW * 10 h = 1 kWh of energy. Electricity bills typically present energy consumption in kilowattóra, and the cost is determined by the price per kWh.

While kilowattóra is a unit of energy, it's important to note that it is not an SI base unit. The SI unit for energy is the joule. One kilowattóra is equal to 3.6 million joules. The kilowattóra is widely adopted due to its practical application in everyday energy usage and billing.