An appliance using 7500 watts of power continuously for 5 hours would use how many Kilowatt Hours?

• A. 18 Kilowatt Hours
• B. 25 Kilowatt Hours
• C. 50 Kilowatt Hours
• D. 37.5 Kilowatt Hours

Answer: (D)

Kilowatt-hours measure energy as power multiplied by time. Convert the power to kilowatts: 7500 W is 7.5 kW. Multiply by the time: 7.5 kW × 5 h = 37.5 kWh. Another way is 7500 W × 5 h = 37,500 Wh, then divide by 1000 to get 37.5 kWh. So the energy used is 37.5 kilowatt-hours.