Most electrical devices, such as appliances, lamps, and electronics, have a label or nameplate that lists their wattage rating. This is usually indicated by the symbol "W" or " Watts."

Look for the "Technical Specs" section, which will list the rated power consumption. Why Does Finding Wattage Matter?

Formula: (Watts × Hours Used Per Day) ÷ 1,000 = Daily Kilowatt-hours (kWh).

A standard home circuit can usually handle 1,800 to 2,400 watts. If you plug a 1,500W space heater and a 1,000W hair dryer into the same circuit, you will trip the breaker.