How Much Electricity Does A Space Heater Use?
Typical space heater: 1,500 W for 6 h a day9 kWh/day · $50.81/month
Most plug-in space heaters run at 1,500 watts on high, the most a standard US outlet comfortably supplies. Change the numbers below for your own space heater and electricity rate.
W
h
¢/kWh
Default rate: US average residential rate of 18.56¢/kWh (EIA, March 2026, via Jouleio). Your bill shows your own rate per kWh.
Result–
Space Heater running cost by hours
| Hours a day | kWh a month | Cost a month | Cost a year |
|---|---|---|---|
| 1 | 45.6 | $8.47 | $101.62 |
| 2 | 91.3 | $16.94 | $203.23 |
| 4 | 182.5 | $33.88 | $406.46 |
| 6 | 273.8 | $50.81 | $609.7 |
| 8 | 365 | $67.75 | $812.93 |
| 12 | 547.6 | $101.63 | $1,219.39 |
| 24 | 1,095.1 | $203.25 | $2,438.78 |
At the US average residential rate of 18.56¢/kWh (EIA, March 2026, via Jouleio).
Other appliances
Questions
How much does it cost to run a space heater?
About $50.81 a month for 6 hours a day at 1,500 W and 18.56¢ per kWh.
How can I measure the real usage?
A plug-in energy meter shows the actual kWh an appliance uses over a few days, which is more accurate than the label rating.