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Understanding Your Energy Usage

Calculate your power consumption

Written by Caitlin Ritchie

Edited by Jamie Cesanek

Last updated 09/18/2023

Hirurg/E+/Getty images

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Key Points

  • The amount of energy you use directly impacts your monthly electricity bill.
  • You can estimate your monthly energy usage using the formulas listed on this page.
  • Understanding and lowering your usage can help you save on energy bills.
Coffee Maker900-1200 watts
Toaster 800-1400 watts
Iron100-1800 watts
Ceiling fan 65-175 watts
Space heater (40gal) 4500-5500 watts
Hair dryer1200-1875 watts
Laptop 50 watts
Computer monitor 150 watts
Computer tower 120 watts
Television 19"-36" 65-133 watts
Television 53"-61" 170 watts
Caitlin Ritchie

Caitlin Ritchie

Caitlin Ritchie is a writer and editor within the energy industry, specializing in deregulation, energy efficiency, and solar power. Her writing and research have been cited by Snopes, The Washington Post, The American Solar Energy Society, and other major sources. Find more of Caitlin’s work at and, or connect on LinkedIn.

Jamie Cesanek

Jamie Cesanek

Jamie Cesanek is an editor who enjoys working with writers to make complex topics more understandable for readers. Though she now brings her focus to energy, she has previously written and edited health content and arts and humanities topics. Find her on LinkedIn.

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