Electric Blanket vs. Space Heater: Running Cost Comparison for Winter Heating

An electric heated blanket uses between 60 and 100 watts on medium settings, costing about 1.1¢ to 1.8¢ per hour. A standard portable space heater draws 1,500 watts on its high setting, costing 27.5¢ per hour at the national average rate of 18.34¢ per kWh. Over an 8-hour winter night, using an electric blanket costs roughly 12 cents, compared to $2.20 for a space heater, delivering a 94% reduction in supplemental heating electricity.

Key takeaways

• Electric blankets heat the person directly rather than warming thousands of cubic feet of bedroom air.
• An electric blanket draws 60 to 100 watts, compared to 1,500 watts for a standard portable heater.
• Running an electric blanket 8 hours a night for four winter months costs roughly $14 in electricity.
• Running a 1,500-watt space heater on the same schedule costs approximately $264 over four winter months.

Direct personal heating versus room space heating

Heating physics explains the enormous cost gap. A space heater warms room air through convection or radiant infrared elements. That warm air rises to the ceiling, mixes with cold drafts, and transfers heat through exterior walls and windows. Keeping an entire bedroom at 70°F overnight requires thousands of thermal BTUs.

An electric blanket places insulated resistive heating wires inside layered fabric directly against bedding. Trapping the heat under a comforter warms your body with minimal heat escaping into the room. This principle allows you to dial your central furnace or heat pump thermostat down to 60°F overnight without feeling cold.

You can compare specific heating costs using our dedicated electric blanket calculator or test high-wattage room heating on the space heater hourly calculator.

Monthly and seasonal cost comparison

Consider a typical winter season lasting 120 nights from November through February, running each device for 8 hours each night. An 80-watt electric blanket uses 0.64 kWh per night, totaling 76.8 kWh for the entire winter ($14.09 total).

A 1,500-watt space heater cycling on a thermostat at a 60% duty cycle draws an average of 900 watts. That amounts to 7.2 kWh per night, totaling 864 kWh over the season ($158.46 total). If the space heater runs continuously on high without cycling, consumption reaches 1,440 kWh ($264.10). In high-rate areas like the Northeast, that space heater easily adds over $400 to your seasonal bill.

Safety and auto-shutoff features

Modern electric blankets include ten-hour automatic shutoff timers and temperature regulation sensors that prevent overheating. Space heaters also include tip-over switches and thermal cutoffs, but their high electrical current (12.5 amps) places heavier thermal stress on wall outlets and branch circuit wiring.

FAQ

Can you sleep with an electric blanket on all night? Modern blankets certified by UL or ETL are designed for overnight use when kept flat. However, many people turn the blanket on 30 minutes before bed to warm the sheets, then turn it off or set it to low before sleeping.

Does a heated mattress pad use the same electricity as an electric blanket? Yes. Heated mattress pads use similar insulated heating elements drawing 60 to 120 watts. Because they sit beneath your body and bedding, they trap heat even more effectively.

How does a space heater cost compare in low-rate states? In Washington or Idaho (roughly 11.5¢/kWh), running a 1,500-watt heater costs about 17¢ per hour. In California or Hawaii (32¢ to 44¢/kWh), the same heater costs 48¢ to 66¢ per hour.

Data notes & sources

Cost figures use the U.S. EIA residential electricity price benchmark of 18.34¢ per kWh and measured appliance electrical loads.

Space heating safety and tips: Department of Energy Small Space Heaters.

Thermostat setback savings: DOE Thermostats and Heating Setbacks.