household · free Companion App · local in this browser
Space-Heater Running Cost Check
Turn heater watts, hours a day, and your electricity rate into a day, month, and year cost.
Privacy: This App does not send or save your entries. Do not enter passwords, codes, full account numbers, or private identifiers.
Enter your numbers
Enter only the details needed for this task. Check them against the original source.
Your result
Your result will appear here.
Engine self-test
Running golden cases…
Source notes
- U.S. Environmental Protection Agency, Energy Star — Appliances
Energy Star publishes efficiency criteria and estimated ranges for major appliances.
Reviewed 2026-10-10. Model-specific energy use varies. Read the EnergyGuide label for the exact unit you own or plan to buy.
What this App does not do
This App estimates cost from the label watts and the rate you enter. It does not measure use or suggest a heater.
This free App has no paid features. It does not contact an agency, employer, bank, seller, provider, or other person.