About WattItCost
By the WattItCost Team
WattItCost is built and maintained by the WattItCost Team, independent researchers building energy-cost tools from official government data.
What We Do
We build free, interactive calculators that show you exactly how much your home appliances cost to run — per hour, per day, per month, and per year — using real electricity rates instead of guesses.
Why We Built This
Electricity costs are rising, but figuring out which appliances drive your bill is harder than it should be. We build tools that help you make better decisions.
How We Work
Every calculator uses electricity rates from the U.S. Energy Information Administration (EIA), updated quarterly. All calculations happen in your browser — we store nothing. Our tools are free, supported by affiliate commissions. You can read exactly how our numbers are produced on our Methodology page, and how content is created and corrected in our Editorial Policy.
Data Sources
- U.S. rates: Energy Information Administration (eia.gov)
- UK rates: Ofgem Energy Price Cap
- Appliance specs: manufacturer data and Department of Energy
Contact
hello@wattitcost.com