Electric blanket and heated mattress pad: cost per night
Cost per night and per month for a heated blanket or mattress pad, from its wattage, the hours you use it and your state's average electricity price.
Short answer
A 100-watt heated blanket left on full for 8 hours uses 0.8 kWh, about $0.15 a night at the US average electricity price for July 2026, or $4.39 for 30 nights. In Hawaii, the most expensive state in that month's figures, 30 nights cost $11.52; in Louisiana, the cheapest, $3.05. A 110-watt heated mattress pad costs $4.83 for the same 30 nights at the US average.
Work out your own cost
Cost in each state
The wattages are two of Sunbeam's listed ratings, used here as examples: 100 watts for a heated blanket and 110 watts for a king-size heated mattress pad. The table assumes full power for 8 hours, which is the most either could use in a night.
| State | Price (¢/kWh) | Blanket, per night | Blanket, 30 nights | Mattress pad, 30 nights |
|---|---|---|---|---|
| Alabama | 16.40 | $0.13 | $3.94 | $4.33 |
| Alaska | 28.83 | $0.23 | $6.92 | $7.61 |
| Arizona | 15.38 | $0.12 | $3.69 | $4.06 |
| Arkansas | 14.33 | $0.11 | $3.44 | $3.78 |
| California | 33.61 | $0.27 | $8.07 | $8.87 |
| Colorado | 17.00 | $0.14 | $4.08 | $4.49 |
| Connecticut | 24.16 | $0.19 | $5.80 | $6.38 |
| Delaware | 18.48 | $0.15 | $4.44 | $4.88 |
| District of Columbia | 25.21 | $0.20 | $6.05 | $6.66 |
| Florida | 15.03 | $0.12 | $3.61 | $3.97 |
| Georgia | 16.27 | $0.13 | $3.90 | $4.30 |
| Hawaii | 48.00 | $0.38 | $11.52 | $12.67 |
| Idaho | 13.73 | $0.11 | $3.30 | $3.62 |
| Illinois | 19.22 | $0.15 | $4.61 | $5.07 |
| Indiana | 16.73 | $0.13 | $4.02 | $4.42 |
| Iowa | 15.99 | $0.13 | $3.84 | $4.22 |
| Kansas | 15.27 | $0.12 | $3.66 | $4.03 |
| Kentucky | 13.81 | $0.11 | $3.31 | $3.65 |
| Louisiana | 12.72 | $0.10 | $3.05 | $3.36 |
| Maine | 32.41 | $0.26 | $7.78 | $8.56 |
| Maryland | 21.41 | $0.17 | $5.14 | $5.65 |
| Massachusetts | 30.49 | $0.24 | $7.32 | $8.05 |
| Michigan | 23.05 | $0.18 | $5.53 | $6.09 |
| Minnesota | 17.45 | $0.14 | $4.19 | $4.61 |
| Mississippi | 14.54 | $0.12 | $3.49 | $3.84 |
| Missouri | 16.09 | $0.13 | $3.86 | $4.25 |
| Montana | 14.99 | $0.12 | $3.60 | $3.96 |
| Nebraska | 13.78 | $0.11 | $3.31 | $3.64 |
| Nevada | 12.77 | $0.10 | $3.06 | $3.37 |
| New Hampshire | 26.60 | $0.21 | $6.38 | $7.02 |
| New Jersey | 25.19 | $0.20 | $6.05 | $6.65 |
| New Mexico | 16.09 | $0.13 | $3.86 | $4.25 |
| New York | 29.90 | $0.24 | $7.18 | $7.89 |
| North Carolina | 15.16 | $0.12 | $3.64 | $4.00 |
| North Dakota | 13.41 | $0.11 | $3.22 | $3.54 |
| Ohio | 19.45 | $0.16 | $4.67 | $5.13 |
| Oklahoma | 14.35 | $0.11 | $3.44 | $3.79 |
| Oregon | 15.97 | $0.13 | $3.83 | $4.22 |
| Pennsylvania | 21.72 | $0.17 | $5.21 | $5.73 |
| Rhode Island | 28.29 | $0.23 | $6.79 | $7.47 |
| South Carolina | 15.47 | $0.12 | $3.71 | $4.08 |
| South Dakota | 15.37 | $0.12 | $3.69 | $4.06 |
| Tennessee | 13.71 | $0.11 | $3.29 | $3.62 |
| Texas | 15.88 | $0.13 | $3.81 | $4.19 |
| Utah | 13.12 | $0.10 | $3.15 | $3.46 |
| Vermont | 23.75 | $0.19 | $5.70 | $6.27 |
| Virginia | 17.55 | $0.14 | $4.21 | $4.63 |
| Washington | 14.71 | $0.12 | $3.53 | $3.88 |
| West Virginia | 15.78 | $0.13 | $3.79 | $4.17 |
| Wisconsin | 19.06 | $0.15 | $4.57 | $5.03 |
| Wyoming | 14.36 | $0.11 | $3.45 | $3.79 |
| US average | 18.31 | $0.15 | $4.39 | $4.83 |
How the calculation works
cost ($) = watts ÷ 1,000 × hours × share at full power × price (¢ per kWh) ÷ 100
Worked example at the US average of 18.31 cents: 100 W ÷ 1,000 = 0.1 kW. Eight hours uses 0.8 kWh, which costs $0.15. Thirty nights uses 24 kWh, or $4.39. The 110-watt pad uses 26.4 kWh over the same 30 nights, which comes to $4.83.
Warming the bed for half an hour and then switching off uses 0.05 kWh, under a cent at the US average.
Where the wattages come from
Sunbeam's product page for its Heated Poseidon Navy Microplush Blanket (model 32810144) gives “Wattage: 100 Watts”. The blanket comes in twin, full, queen and king sizes, and the page lists one wattage for the line rather than one per size. Sunbeam's page for its Restful Premium Quilted Heated Mattress Pad in king size, 80 by 76 inches (model 32810157), lists 110 watts. Both have 12 heat settings and a 12-hour automatic shut-off, according to Sunbeam.
A single wattage is a rating, not a meter reading. Sunbeam doesn't publish what the blanket draws on each of its 12 settings, so the calculator's 100% figure is a ceiling. If your blanket's label shows a different wattage, or if a dual-control king lists one per side, use the number on your own label.
A heated bed against a space heater
The difference in scale is large. A 1,500-watt space heater at full power for eight hours uses 12 kWh; the 100-watt blanket uses 0.8 kWh in the same time, fifteen times less. At the US average, that's $2.20 a night for the heater against $0.15 for the blanket. The comparison isn't like for like: one warms a room, the other warms a bed. But if the goal is to sleep warm in a cool bedroom, the bed is the cheaper thing to heat. Our space heater calculator has the full state-by-state figures for heaters.
Using one safely
The US Consumer Product Safety Commission's home safety checklist says electrically heated blankets should not be folded, covered by other objects or “tucked in” while in use, and that the power cord shouldn't be pinched or crushed by the bed. The checklist adds: “Do not allow anything, including other blankets, comforters, and even sleeping pets, on top of the electric blanket while it is in use.” It also says the edges should hang freely over the sides and end of the bed. Follow the instructions that come with your own blanket or pad as well; Sunbeam links a manual from each product page.
What the state price is
Prices are the residential averages in the US Energy Information Administration's Electric Power Monthly, Table 5.6.A, for July 2026, marked by EIA as preliminary. They are state-wide averages, not the rate on any one bill. EIA's next release is due on October 23, 2026, and the table will be updated when it comes out.
Sources
- U.S. Energy Information Administration, Electric Power Monthly, Table 5.6.A: Average Price of Electricity to Ultimate Customers by End-Use Sector, by State, July 2026 and 2025, residential column. Data for July 2026, released September 24, 2026; next release October 23, 2026. Read October 1, 2026.
- Sunbeam, Sunbeam Heated Poseidon Navy Microplush Blanket 12 Heat Settings: model 32810144, wattage 100 watts, sizes twin to king. Read October 1, 2026.
- Sunbeam, Sunbeam Restful Premium Quilted Heated Mattress Pad King 80x76 (Sunbeam's Canadian store page): model 32810157, wattage 110 watts. Read October 1, 2026.
- U.S. Consumer Product Safety Commission, Safety for Older Consumers: Home Safety Checklist (Publication 701), bedroom section on electrically heated blankets. Read October 1, 2026.
Changes: first published October 1, 2026.