Heater wattageMost plug-in heaters are 1,500 W on high and 750 W on low. The wattage is printed on the label.
Hours at full power. If the thermostat cycles the heater on and off, use fewer hours.
The EIA’s winter outlook covers November through March.
U.S. average residential price, July 2026 (EIA). Your bill shows your own rate.
Cost per month$65.92
Cost per day$2.20
Cost per hour$0.27
Cost per season$329.58
kWh per hour1.5
kWh per day12
kWh per month360
kWh per season1,800
Heat output5,118 BTU per hour

1,500 W ÷ 1,000 = 1.5 kW × 8 hours = 12 kWh a day × 18.31¢ = $2.20 a day, $65.92 over 30 days and $329.58 over 5 months.

Cost by hours of use per day
Hours per dayPer monthPer season
1$8.24$41.20
2$16.48$82.40
4$32.96$164.79
6$49.44$247.18
8$65.92$329.58
10$82.40$411.97
12$98.87$494.37
16$131.83$659.16
24$197.75$988.74

Space Heater Cost Calculator · free calculator by CalcWorthy