Space Heater Cost Calculator
Pick the heater wattage, hours per day and your electricity price. The calculator gives the cost per hour, per day and per 30-day month - a 1500 W heater burns 1.5 kWh every hour it runs, which adds up faster than most bills suggest.
Utility blogs print tables for their own tariffs. This one uses your price and your hours, then says the quiet part: electric resistance heat is the priciest kind, so the strategy is heating the room and the person - not competing with the whole-house thermostat.
How to use
- Read the wattage off the heater label - 1500 W is the standard setting.
- Enter honest hours: the evenings you actually sit in that room.
- Take your price per kWh from the bill, and read the month figure sitting down.
Frequently asked questions
How much does a 1500 W space heater cost per hour?
At the typical 17 cents per kWh, about 26 cents an hour - 1.5 kWh times the tariff. Eight evening hours a day lands near 2 dollars, and a cold month of that habit approaches 60 dollars per heater.
Is it cheaper to run a space heater or the furnace?
One heater heating one occupied room usually beats the furnace; three heaters running all day do not. The crossover is simple - the heater wins when you would otherwise heat empty rooms, and loses the moment it runs everywhere at once.
Do space heaters use a lot of electricity?
Yes - 1500 W is comparable to a microwave that runs for hours. That is why the honest strategy is zone heating: close doors, heat the room you are in, and turn the central thermostat down while you do it.
What are the space heater safety rules?
Three feet of clearance from anything flammable, never on an extension cord or power strip, on a hard level floor, switched off when you sleep or leave - and buy a unit with a tip-over switch, because space heaters head the home-fire statistics every single winter.