How much does a 1500-watt heater cost per day?
A 1500-watt heater costs $1.11/day at 4 hours, $2.21/day at 8 hours, $3.32/day at 12 hours, and $6.64/day at 24 hours, at the US average rate of 18.44¢/kWh and full rated wattage throughout.
How much does a space heater cost per day?
A typical 1500W space heater costs $2.21 per day running 8 hours at the US average rate of 18.44¢/kWh. Costs range from $0.74/day (1000W, 4 hrs) to $22.13/day (5000W, 24 hrs).
Is it cheaper to run a space heater or central heat?
For heating one room, a space heater is usually cheaper: $2.21/day for a 1500W unit run 8 hours. For scale, the EIA Winter Fuels Outlook forecast the average US household would spend $642 on natural gas or $1,133 on electricity across the November 2025–March 2026 heating season — roughly $4.25 and $7.50 a day averaged over the season, for the whole house. So one space heater is cheaper only while the rest of the house sits cool; once two or three rooms need heating the comparison flips. Those season figures are EIA forecasts, not outturn.
How many hours should I run a space heater per day?
For zone heating (one room), 4–8 hours per day is typical. Running more than 12 hours/day on a 1500W heater costs over $3.32/day, and a heater that never gets to switch off usually means it is undersized for the room, or the room is losing heat faster than it can replace it.