Cost to Run a 900-watt air conditioner for 10 hours in Pennsylvania
Running a 900-watt air conditioner for 10 hours uses 9 kWh and costs $1.62 at $0.18/kWh in Pennsylvania. Do that every day and it adds up to $48.60 a month.
Calculate your own cost
- Per hour
- $0.1620.9 kWh
- Per day
- $1.629 kWh
- Per week
- $11.3463 kWh
- Per month (30 days)
- $48.60270 kWh
- Per year
- $591.303,285 kWh
Formula: watts ÷ 1,000 × hours × rate. Edit any box and every number updates instantly.
People also ask
How much does a 900-watt air conditioner cost per hour?
At $0.18/kWh, it costs $0.162 per hour. The maths: 900 W ÷ 1,000 = 0.9 kWh per hour, × $0.18 = $0.162.
How much does it cost per month?
Used 10 hours a day for 30 days, it costs about $48.60 per month and uses 270 kWh. Change the hours in the calculator above to match how you use it.
How many kWh does it use?
9 kWh per day, 270 kWh per month and 3,285 kWh per year at 10 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?
Set the thermostat to 78°F (26°C), clean the filter monthly and shade sunny windows. 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 $27.00 and at 30¢ it is $81.00. Find your rate on your bill (total cost ÷ kWh used) and type it into the calculator.
Cost by hours of use in Pennsylvania
| Used per day | Energy per day | Cost per day | Cost per month | Cost per year |
|---|---|---|---|---|
| 1 hour | 0.9 kWh | $0.162 | $4.86 | $59.13 |
| 2 hours | 1.8 kWh | $0.324 | $9.72 | $118.26 |
| 3 hours | 2.7 kWh | $0.486 | $14.58 | $177.39 |
| 4 hours | 3.6 kWh | $0.648 | $19.44 | $236.52 |
| 5 hours | 4.5 kWh | $0.81 | $24.30 | $295.65 |
| 6 hours | 5.4 kWh | $0.972 | $29.16 | $354.78 |
| 7 hours | 6.3 kWh | $1.13 | $34.02 | $413.91 |
| 8 hours | 7.2 kWh | $1.30 | $38.88 | $473.04 |
| 9 hours | 8.1 kWh | $1.46 | $43.74 | $532.17 |
| 10 hours | 9 kWh | $1.62 | $48.60 | $591.30 |
| 11 hours | 9.9 kWh | $1.78 | $53.46 | $650.43 |
| 12 hours | 10.8 kWh | $1.94 | $58.32 | $709.56 |
| 13 hours | 11.7 kWh | $2.11 | $63.18 | $768.69 |
| 14 hours | 12.6 kWh | $2.27 | $68.04 | $827.82 |
| 15 hours | 13.5 kWh | $2.43 | $72.90 | $886.95 |
| 16 hours | 14.4 kWh | $2.59 | $77.76 | $946.08 |
| 17 hours | 15.3 kWh | $2.75 | $82.62 | $1,005.21 |
| 18 hours | 16.2 kWh | $2.92 | $87.48 | $1,064.34 |
| 19 hours | 17.1 kWh | $3.08 | $92.34 | $1,123.47 |
| 20 hours | 18 kWh | $3.24 | $97.20 | $1,182.60 |
| 21 hours | 18.9 kWh | $3.40 | $102.06 | $1,241.73 |
| 22 hours | 19.8 kWh | $3.56 | $106.92 | $1,300.86 |
| 23 hours | 20.7 kWh | $3.73 | $111.78 | $1,359.99 |
| 24 hours | 21.6 kWh | $3.89 | $116.64 | $1,419.12 |
How we worked it out
- Energy per hour: 900 W ÷ 1,000 = 0.9 kWh
- Cost per hour: 0.9 kWh × $0.18 = $0.162
- Cost per day: × 10 hours = $1.62
- Month and year: × 30 days = $48.60, × 365 days = $591.30
Pennsylvania electricity prices
Pennsylvania pays about $0.18 per kWh, which is 3% higher than the US average of $0.175. The same air conditioner would cost $47.25 a month at the national average.
What it costs in different places
Same 900-watt air conditioner, 10 hours a day. Only the local electricity rate changes.
| Place | Rate per kWh | Cost per month |
|---|---|---|
| United States | $0.175 | $47.25 |
| California | $0.32 | $86.40 |
| Texas | $0.155 | $41.85 |
| New York | $0.25 | $67.50 |
| Florida | $0.155 | $41.85 |
| Illinois | $0.17 | $45.90 |
| Pennsylvania | $0.18 | $48.60 |
| Ohio | $0.17 | $45.90 |
| Washington | $0.115 | $31.05 |
About air conditioner running costs
Window and split air conditioners use a compressor that cycles on and off. Watts depend on size, from about 500 W for a small unit to 3,500 W for a large one.
Typical sizes: 500 W, 900 W, 1,200 W, 1,500 W, 2,000 W, 3,500 W.
How to spend less: Set the thermostat to 78°F (26°C), clean the filter monthly and shade sunny windows.
What this estimate assumes
- The appliance draws its full stated wattage the whole time it is on. Real units with a thermostat cycle off and cost less.
- 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 Pennsylvania. 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.