How can you calculate your electricity bill?

To calculate your electricity bill, the correct method involves multiplying the energy consumed, measured in kilowatt-hours (kWh), by the price you are charged per kilowatt-hour. This is because the total amount you pay for electricity depends on how much energy you've used over a certain period and the rate that your electricity provider charges for that energy.

When you use energy in kilowatt-hours, it reflects a measure of power used over time (1 kWh means you have used 1 kilowatt of power for 1 hour). The price per kilowatt-hour is what consumers look to as a cost marker for their energy consumption. Hence, the formula takes the total energy consumed in kWh and multiplies it by the cost per kWh to give the total cost in currency.

Other options do not accurately represent the calculation of an electricity bill. Some propose using units that mix energy and time, or incorrect relationships that don't correspond to standard billing practices.