How much does it cost to run a CPAP machine?
A CPAP machine costs about 1.0¢ per hour, 8.2¢ a day, $2.50 a month and $30 a year at typical use (8 hours a day) and the U.S. average rate of 17.99¢/kWh. CPAP blowers use 15-30 W; the heated humidifier and heated tubing push average draw to 50-90 W, so humidification is most of the energy.
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Cost by setting
| Setting | Watts | Per hour | Per day | Per month | Per year |
|---|---|---|---|---|---|
| Without humidifier | 20 | 0.4¢ | 3.2¢ | $0.96 | $12 |
| With heated humidifier | 55 | 1.0¢ | 8.2¢ | $2.50 | $30 |
| Heated humidifier + heated tube | 80 | 1.4¢ | 12¢ | $3.59 | $43 |
At 8 hours a day and 17.99¢/kWh.
Cost by hours of use
| Hours per day | kWh/day | Per day | Per month | Per year (all year) |
|---|---|---|---|---|
| 1 hour | 0.08 | 1.4¢ | $0.43 | $5 |
| 2 hours | 0.13 | 2.4¢ | $0.72 | $9 |
| 4 hours | 0.24 | 4.3¢ | $1.31 | $16 |
| 8 hours | 0.46 | 8.2¢ | $2.50 | $30 |
| 12 hours | 0.67 | 12¢ | $3.68 | $44 |
| 24 hours | 1.32 | 24¢ | $7.23 | $87 |
Cost to run a CPAP machine in every state
The same CPAP machine costs $21 a year in North Dakota and $72 in Hawaii, at each state's average residential rate (12 months ending July 2026).
| State | Rate | Per hour | Per month | Per year |
|---|---|---|---|---|
| North Dakota | 12.32¢ | 0.7¢ | $1.71 | $21 |
| Idaho | 12.65¢ | 0.7¢ | $1.76 | $21 |
| Nebraska | 12.86¢ | 0.7¢ | $1.78 | $21 |
| Louisiana | 12.99¢ | 0.7¢ | $1.80 | $22 |
| Utah | 13.32¢ | 0.7¢ | $1.85 | $22 |
| Nevada | 13.36¢ | 0.7¢ | $1.85 | $22 |
| Arkansas | 13.43¢ | 0.7¢ | $1.86 | $22 |
| Tennessee | 13.56¢ | 0.7¢ | $1.88 | $23 |
| Oklahoma | 13.70¢ | 0.8¢ | $1.90 | $23 |
| Montana | 13.84¢ | 0.8¢ | $1.92 | $23 |
| Kentucky | 13.92¢ | 0.8¢ | $1.93 | $23 |
| Missouri | 13.95¢ | 0.8¢ | $1.94 | $23 |
| Wyoming | 14.01¢ | 0.8¢ | $1.94 | $23 |
| Washington | 14.12¢ | 0.8¢ | $1.96 | $24 |
| Iowa | 14.13¢ | 0.8¢ | $1.96 | $24 |
| South Dakota | 14.20¢ | 0.8¢ | $1.97 | $24 |
| Mississippi | 14.77¢ | 0.8¢ | $2.05 | $25 |
| North Carolina | 14.77¢ | 0.8¢ | $2.05 | $25 |
| Kansas | 15.09¢ | 0.8¢ | $2.09 | $25 |
| Georgia | 15.12¢ | 0.8¢ | $2.10 | $25 |
| New Mexico | 15.32¢ | 0.8¢ | $2.13 | $26 |
| Florida | 15.39¢ | 0.8¢ | $2.14 | $26 |
| Arizona | 15.40¢ | 0.8¢ | $2.14 | $26 |
| West Virginia | 15.48¢ | 0.9¢ | $2.15 | $26 |
| Oregon | 15.50¢ | 0.9¢ | $2.15 | $26 |
| South Carolina | 15.64¢ | 0.9¢ | $2.17 | $26 |
| Texas | 15.96¢ | 0.9¢ | $2.22 | $27 |
| Minnesota | 16.22¢ | 0.9¢ | $2.25 | $27 |
| Alabama | 16.44¢ | 0.9¢ | $2.28 | $27 |
| Virginia | 16.48¢ | 0.9¢ | $2.29 | $27 |
| Colorado | 16.58¢ | 0.9¢ | $2.30 | $28 |
| Indiana | 16.94¢ | 0.9¢ | $2.35 | $28 |
| Delaware | 17.79¢ | 1.0¢ | $2.47 | $30 |
| Ohio | 18.25¢ | 1.0¢ | $2.53 | $30 |
| Wisconsin | 18.74¢ | 1.0¢ | $2.60 | $31 |
| Illinois | 18.79¢ | 1.0¢ | $2.61 | $31 |
| Pennsylvania | 20.70¢ | 1.1¢ | $2.87 | $34 |
| Maryland | 21.03¢ | 1.2¢ | $2.92 | $35 |
| Michigan | 21.05¢ | 1.2¢ | $2.92 | $35 |
| New Jersey | 23.78¢ | 1.3¢ | $3.30 | $40 |
| Vermont | 23.80¢ | 1.3¢ | $3.30 | $40 |
| District of Columbia | 24.20¢ | 1.3¢ | $3.36 | $40 |
| New Hampshire | 26.67¢ | 1.5¢ | $3.70 | $44 |
| Alaska | 26.85¢ | 1.5¢ | $3.73 | $45 |
| Connecticut | 27.99¢ | 1.5¢ | $3.88 | $47 |
| New York | 28.39¢ | 1.6¢ | $3.94 | $47 |
| Rhode Island | 29.27¢ | 1.6¢ | $4.06 | $49 |
| Maine | 29.31¢ | 1.6¢ | $4.07 | $49 |
| Massachusetts | 30.43¢ | 1.7¢ | $4.22 | $51 |
| California | 32.99¢ | 1.8¢ | $4.58 | $55 |
| Hawaii | 43.51¢ | 2.4¢ | $6.04 | $72 |
How to cut the cost
- Lower humidifier setting by 1-2 steps or use Auto/Climate Control mode.
- Fill with room-temperature distilled water so the heater does less work.
- Wrap the tube in a fabric cover instead of using a heated tube.
- Ask your provider about turning off humidification in summer if comfortable.
Cheaper ways to get the job done
Reduces rainout so you can run lower humidity and tube heat.
See options on AmazonKeeps therapy running during outages.
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Compare with similar appliances
| Appliance | Watts | Typical use | Per month | Per year |
|---|---|---|---|---|
| CPAP machine | 55 | 8 hours a day | $2.50 | $30 |
| Oxygen concentrator | 300 | 24 hours a day | $39.43 | $473 |
| Heating pad | 50 | 1 hour a day | $0.19 | $2 |
| Sound machine | 3 | 10 hours a day | $0.20 | $2 |
| Massage chair | 200 | 30 minutes a day | $0.93 | $11 |
Head-to-head comparisons
Frequently asked questions
How much does it cost to run a CPAP machine per hour?
A CPAP machine drawing 55 watts uses 0.06 kWh per hour. At the U.S. average of 17.99¢/kWh that's 1.0¢ per hour. In North Dakota (12.32¢) it's 0.7¢. In Hawaii (43.51¢) it's 2.4¢.
How much does it cost to run a CPAP machine per month?
At typical use (8 hours a day), a CPAP machine costs about $2.50 a month and $30 a year, at the U.S. average rate. Enter your ZIP in the calculator above for your utility's rate.
How many watts does a CPAP machine use?
Most CPAP machines use 15 to 110 watts, depending on the setting (without humidifier 20 W, with heated humidifier 55 W, heated humidifier + heated tube 80 W). Plugged in but off, it still draws about 1 W of standby power. Check the label on the back or bottom for your model's exact rating.
How many kWh does a CPAP machine use?
About 0.46 kWh a day and 167 kWh a year at typical use (8 hours a day).
Does a CPAP machine use a lot of electricity?
No. At about 167 kWh a year it's a small share (1.6%) of the average U.S. home's 10,492 kWh.
Is it cheaper to run a CPAP machine or an oxygen concentrator?
At typical use, a CPAP machine costs about $30 a year versus $473 for an oxygen concentrator. So the CPAP machine is cheaper by about $443 a year. Use the comparison table above to compare them at your own settings.
How can I lower the cost of running a CPAP machine?
- Lower humidifier setting by 1-2 steps or use Auto/Climate Control mode.
- Fill with room-temperature distilled water so the heater does less work.
- Wrap the tube in a fabric cover instead of using a heated tube.
Rates updated 2026-10-21: EIA data through July 2026. Typical wattage and usage reviewed against DOE, ENERGY STAR and manufacturer specs. Methodology.