Space heater Electricity Cost Calculator
Estimate running cost from wattage, daily use, and your utility rate. Replace the preset with values from your own appliance for a more useful result.
Appliance and usage
Start with a typical value, then enter what is on your device label.
$32.40 per month
Monthly estimates use 30 days; annual estimates use 365 days.
A 1,500-watt space heater running 4 hours a day uses 6 kWh daily.
At $0.18 per kWh, that costs $1.08 per day, $32.40 per 30-day month, and $394.20 per year.
Cost of the space heater
At $0.18 per kWh, the illustrative preset costs $1.08 per day, $32.40 per 30-day month, and $394.20 per year.
The four-hour preset assumes the heater draws its full 1,500 W throughout that time. If a thermostat switches it off between heating periods, enter the equivalent full-power hours instead.
Illustrative full-power portable heater preset. Guidance: U.S. Energy Information Administration — Measuring Electricity. Checked 2026-10-01.