For a full comparison framework and method-selection guide, see the Budget Methods hub.
For challenge frameworks, implementation plans, and realistic savings systems, see the Saving Challenges hub.
For a full comparison framework and method-selection guide, see the Budget Methods hub.
For challenge frameworks, implementation plans, and realistic savings systems, see the Saving Challenges hub.
Space heaters are simple to use, but the electricity bill surprise catches many people off guard. Here’s exactly what a space heater costs per hour, per day, and per month.
Quick Reference: Space Heater Cost Per Hour
| Wattage | Cost Per Hour* | Cost Per Day (8 hrs) | Cost Per Month (8 hrs/day) |
|---|---|---|---|
| 500W (small) | $0.06 | $0.48 | $14 |
| 750W (low setting) | $0.09 | $0.72 | $22 |
| 1,000W | $0.12 | $0.96 | $29 |
| 1,500W (standard) | $0.18 | $1.44 | $43 |
| 2,000W | $0.24 | $1.92 | $58 |
*At $0.12/kWh (US average)
How to Calculate Your Exact Cost
The Formula
Cost per hour = (Watts ÷ 1,000) × electricity rate
Example: 1,500W heater, $0.12/kWh:
(1,500 ÷ 1,000) × $0.12 = $0.18 per hour
By Electricity Rate
| Your Rate | 1,500W/hr | 750W/hr |
|---|---|---|
| $0.08/kWh | $0.12 | $0.06 |
| $0.10/kWh | $0.15 | $0.08 |
| $0.12/kWh | $0.18 | $0.09 |
| $0.15/kWh | $0.23 | $0.11 |
| $0.20/kWh | $0.30 | $0.15 |
| $0.25/kWh | $0.38 | $0.19 |
Find your rate: Look at your electric bill—total charges divided by kWh used.
Monthly Space Heater Costs
1,500-Watt Space Heater (Standard)
| Hours Per Day | Monthly Cost* | 3-Month Season |
|---|---|---|
| 2 hours | $11 | $32 |
| 4 hours | $22 | $65 |
| 6 hours | $32 | $97 |
| 8 hours | $43 | $130 |
| 10 hours | $54 | $162 |
| 24 hours (constant) | $130 | $389 |
*At $0.12/kWh
750-Watt Space Heater (Low Setting or Small Unit)
| Hours Per Day | Monthly Cost* |
|---|---|
| 2 hours | $5 |
| 4 hours | $11 |
| 8 hours | $22 |
| 12 hours | $32 |
Space Heater vs. Central Heat: Which Is Cheaper?
Heating One Room
| Option | Hourly Cost | 8 hrs/day Monthly |
|---|---|---|
| Electric space heater (1,500W) | $0.18 | $43 |
| Electric baseboard heat (per room) | $0.18-$0.36 | $43-$86 |
| Central gas heat (per room equivalent) | $0.05-$0.10 | $12-$24 |
Space heater vs. gas: Electric space heaters cost 2-3x more than gas heat per unit of warmth.
Heating Your Whole Home
| Option | Monthly Cost (2,000 sq ft, cold climate) |
|---|---|
| Gas furnace | $80-$150 |
| Electric heat pump | $100-$200 |
| Central electric heat | $200-$400 |
| Electric space heaters (whole home) | $300-$600+ |
Takeaway: Space heaters for a whole home is very expensive. Use them for targeted heating of one unoccupied room only.
When Space Heaters Save Money
| Situation | Space Heater Wins? |
|---|---|
| Only one room needs heat | Yes |
| Everyone is in one room | Yes |
| Supplementing central heat in cold zones | Yes |
| Heating a poorly insulated room | Sometimes |
| Full home heating | No |
| Running overnight | No (safety concern too) |
Space Heater Types and Costs
| Type | Typical Wattage | Cost/hr | Best For |
|---|---|---|---|
| Ceramic | 750-1,500W | $0.09-$0.18 | Small-medium rooms |
| Oil-filled radiator | 600-1,500W | $0.07-$0.18 | Sustained heat, less cycling |
| Infrared | 300-1,500W | $0.04-$0.18 | Targeted body heat |
| Fan-forced | 750-1,500W | $0.09-$0.18 | Quick heat, large rooms |
| Baseboard | 500-2,000W | $0.06-$0.24 | Permanent installation |
Oil-filled radiators cycle on/off more efficiently—they can cost 10-25% less than ceramic models for the same perceived warmth.
Tips to Cut Space Heater Costs
Immediate Actions
| Action | Estimated Savings |
|---|---|
| Use low setting (750W) instead of high (1,500W) | ~50% of heater cost |
| Turn off when leaving room | Proportional savings |
| Close room door to contain heat | 20-30% less run time |
| Lower central heat 2-3°F, use space heater in main room | Net savings possible |
| Dress warmly, use blanket | Reduce running time |
Reduce Room Heat Loss
| Action | Cost | Benefit |
|---|---|---|
| Draft stopper at door | $10-$20 | Less heat escaping |
| Weatherstrip windows | $20-$40 | Less cold air entering |
| Thermal curtains | $30-$80 | Reduces window heat loss |
Smart Thermostat Strategy
Lower your whole-home thermostat, use a space heater only in occupied rooms:
| Whole Home Thermostat | Bedroom Space Heater | Monthly Savings vs 68°F Throughout |
|---|---|---|
| 65°F + space heater in 1 room | 8 hrs/day | $20-$40 in gas savings |
| 62°F + space heater in 1 room | 10 hrs/day | $40-$80 in gas savings |
Only works if you’re in one room most of the time.
Safety Note
| Risk | Prevention |
|---|---|
| Fire from proximity | Keep 3 feet clear of flammables |
| Overnight use | Don’t run while sleeping |
| Unattended | Turn off when leaving room |
| Overloaded outlet | Plug directly into wall, not extension cord |
Space heater fires cause ~1,700 home fires per year (NFPA). The running cost risk is financial; the safety risk is real.
Frequently Asked Questions
Will my space heater blow a circuit breaker?
A 1,500W heater on a standard 15-amp circuit uses 12.5 amps—that’s 83% of the circuit. Don’t run other high-draw appliances on the same circuit. A 20-amp circuit handles it more comfortably.
Does leaving a space heater on all day cost a lot?
Yes. 1,500W for 24 hours = 36 kWh = $4.32/day at $0.12/kWh = $130/month. Only run it when you’re in the room.
Is an oil-filled radiator cheaper to run than a ceramic heater?
They use the same electricity per watt, but oil-filled radiators retain heat and cycle on/off less. This can reduce actual electricity use by 5-20% compared to a ceramic heater at the same thermostat setting.
How does a space heater compare to turning up the thermostat?
For one room: space heater costs $43/month (8 hrs/day). For whole home: raising thermostat 2°F costs an extra $15-$30/month in gas, or $30-$50 in electric heat. If you’re mainly in one room, the space heater can be cheaper.
Related Guides
A 1,500-watt space heater costs about 18 cents per hour—$43/month if you run it 8 hours a day. That sounds manageable, but running it as primary heat all winter can add $300-$600 to your bill. The smart play: keep whole-home heat lower, use a space heater only in the room you’re actively using, and turn it off the moment you leave.
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