How Much Does A Heated Mattress Pad Cost to Run in Washington?
A heated mattress pad typically uses 100 watts. At 6 hours a day, drawing full power about 50% of the time, and $0.115/kWh in Washington, it costs about $0.035 per day, $1.04 per month and $12.59 per year.
Calculate your own cost
- Per hour
- $0.0060.05 kWh
- Per day
- $0.0350.3 kWh
- Per week
- $0.2422.1 kWh
- Per month (30 days)
- $1.049 kWh
- Per year
- $12.59110 kWh
Formula: watts ÷ 1,000 × hours × rate. Edit any box and every number updates instantly.
People also ask
How much does a 100-watt heated mattress pad cost per hour?
At $0.115/kWh, it costs $0.006 per hour. The maths: 100 W ÷ 1,000 = 0.1 kWh per hour, × $0.115 = $0.012. This page assumes it draws full power about 50% of the time, so the hourly figure shown is lower.
How much does it cost per month?
Used 6 hours a day for 30 days, it costs about $1.04 per month and uses 9 kWh. Change the hours in the calculator above to match how you use it.
How many kWh does it use?
0.3 kWh per day, 9 kWh per month and 110 kWh per year at 6 hours a day. A kWh is one kilowatt (1,000 W) used for one hour. It is the unit on your electricity bill.
How can I lower the cost?
Pre-warm the bed and use a low setting with the built-in timer. Check your bill for the exact rate and enter it above.
Does my electricity rate change the answer?
Yes, a lot. At 10¢ per kWh the monthly cost is $0.90 and at 30¢ it is $2.70. Find your rate on your bill (total cost ÷ kWh used) and type it into the calculator.
Cost by hours of use in Washington
| Used per day | Energy per day | Cost per day | Cost per month | Cost per year |
|---|---|---|---|---|
| 1 hour | 0.05 kWh | $0.006 | $0.173 | $2.10 |
| 2 hours | 0.1 kWh | $0.012 | $0.345 | $4.20 |
| 3 hours | 0.15 kWh | $0.017 | $0.518 | $6.30 |
| 4 hours | 0.2 kWh | $0.023 | $0.69 | $8.40 |
| 5 hours | 0.25 kWh | $0.029 | $0.863 | $10.49 |
| 6 hours | 0.3 kWh | $0.035 | $1.04 | $12.59 |
| 7 hours | 0.35 kWh | $0.04 | $1.21 | $14.69 |
| 8 hours | 0.4 kWh | $0.046 | $1.38 | $16.79 |
| 9 hours | 0.45 kWh | $0.052 | $1.55 | $18.89 |
| 10 hours | 0.5 kWh | $0.058 | $1.73 | $20.99 |
| 11 hours | 0.55 kWh | $0.063 | $1.90 | $23.09 |
| 12 hours | 0.6 kWh | $0.069 | $2.07 | $25.19 |
| 13 hours | 0.65 kWh | $0.075 | $2.24 | $27.28 |
| 14 hours | 0.7 kWh | $0.081 | $2.42 | $29.38 |
| 15 hours | 0.75 kWh | $0.086 | $2.59 | $31.48 |
| 16 hours | 0.8 kWh | $0.092 | $2.76 | $33.58 |
| 17 hours | 0.85 kWh | $0.098 | $2.93 | $35.68 |
| 18 hours | 0.9 kWh | $0.104 | $3.11 | $37.78 |
| 19 hours | 0.95 kWh | $0.109 | $3.28 | $39.88 |
| 20 hours | 1 kWh | $0.115 | $3.45 | $41.98 |
| 21 hours | 1.05 kWh | $0.121 | $3.62 | $44.07 |
| 22 hours | 1.1 kWh | $0.127 | $3.80 | $46.17 |
| 23 hours | 1.15 kWh | $0.132 | $3.97 | $48.27 |
| 24 hours | 1.2 kWh | $0.138 | $4.14 | $50.37 |
How we worked it out
- Energy per hour: 100 W ÷ 1,000 = 0.1 kWh, × 50% of the time at full power = 0.05 kWh
- Cost per hour: 0.05 kWh × $0.115 = $0.006
- Cost per day: × 6 hours = $0.035
- Month and year: × 30 days = $1.04, × 365 days = $12.59
Washington electricity prices
Washington pays about $0.115 per kWh, which is 34% lower than the US average of $0.175. The same heated mattress pad would cost $1.58 a month at the national average.
What it costs in different places
Same 100-watt heated mattress pad, 6 hours a day. Only the local electricity rate changes.
| Place | Rate per kWh | Cost per month |
|---|---|---|
| United States | $0.175 | $1.58 |
| California | $0.32 | $2.88 |
| Texas | $0.155 | $1.40 |
| New York | $0.25 | $2.25 |
| Florida | $0.155 | $1.40 |
| Illinois | $0.17 | $1.53 |
| Pennsylvania | $0.18 | $1.62 |
| Ohio | $0.17 | $1.53 |
| Washington | $0.115 | $1.04 |
About heated mattress pad running costs
Heated mattress pads warm a bed directly, so their energy use is usually much lower than heating the whole bedroom. Thermostats cycle the element.
Typical sizes: 60 W, 100 W, 120 W, 180 W.
How to spend less: Pre-warm the bed and use a low setting with the built-in timer.
What this estimate assumes
- The appliance draws full power about 50% of the time, because it cycles on and off.
- Wattage is the typical label value, not a measured value. Check the label on your own appliance.
- The rate is an approximate residential average in Washington. Your bill may include fixed fees, tiers or time-of-use pricing. Edit the rate above.
- A month is 30 days and a year is 365 days.