Cost to Run a 900-watt air conditioner for 10 hours in Texas
Running a 900-watt air conditioner for 10 hours uses 9 kWh and costs $1.40 at $0.155/kWh in Texas. Do that every day and it adds up to $41.85 a month.
Calculate your own cost
- Per hour
- $0.140.9 kWh
- Per day
- $1.409 kWh
- Per week
- $9.7763 kWh
- Per month (30 days)
- $41.85270 kWh
- Per year
- $509.183,285 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 $0.155/kWh, it costs $0.14 per hour. The maths: 900 W ÷ 1,000 = 0.9 kWh per hour, × $0.155 = $0.14.
How much does it cost per month?
Used 10 hours a day for 30 days, it costs about $41.85 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 Texas
| Used per day | Energy per day | Cost per day | Cost per month | Cost per year |
|---|---|---|---|---|
| 1 hour | 0.9 kWh | $0.14 | $4.19 | $50.92 |
| 2 hours | 1.8 kWh | $0.279 | $8.37 | $101.84 |
| 3 hours | 2.7 kWh | $0.419 | $12.56 | $152.75 |
| 4 hours | 3.6 kWh | $0.558 | $16.74 | $203.67 |
| 5 hours | 4.5 kWh | $0.698 | $20.93 | $254.59 |
| 6 hours | 5.4 kWh | $0.837 | $25.11 | $305.51 |
| 7 hours | 6.3 kWh | $0.977 | $29.30 | $356.42 |
| 8 hours | 7.2 kWh | $1.12 | $33.48 | $407.34 |
| 9 hours | 8.1 kWh | $1.26 | $37.67 | $458.26 |
| 10 hours | 9 kWh | $1.40 | $41.85 | $509.18 |
| 11 hours | 9.9 kWh | $1.53 | $46.04 | $560.09 |
| 12 hours | 10.8 kWh | $1.67 | $50.22 | $611.01 |
| 13 hours | 11.7 kWh | $1.81 | $54.41 | $661.93 |
| 14 hours | 12.6 kWh | $1.95 | $58.59 | $712.85 |
| 15 hours | 13.5 kWh | $2.09 | $62.78 | $763.76 |
| 16 hours | 14.4 kWh | $2.23 | $66.96 | $814.68 |
| 17 hours | 15.3 kWh | $2.37 | $71.15 | $865.60 |
| 18 hours | 16.2 kWh | $2.51 | $75.33 | $916.52 |
| 19 hours | 17.1 kWh | $2.65 | $79.52 | $967.43 |
| 20 hours | 18 kWh | $2.79 | $83.70 | $1,018.35 |
| 21 hours | 18.9 kWh | $2.93 | $87.89 | $1,069.27 |
| 22 hours | 19.8 kWh | $3.07 | $92.07 | $1,120.19 |
| 23 hours | 20.7 kWh | $3.21 | $96.26 | $1,171.10 |
| 24 hours | 21.6 kWh | $3.35 | $100.44 | $1,222.02 |
How we worked it out
- Energy per hour: 900 W ÷ 1,000 = 0.9 kWh
- Cost per hour: 0.9 kWh × $0.155 = $0.14
- Cost per day: × 10 hours = $1.40
- Month and year: × 30 days = $41.85, × 365 days = $509.18
Texas electricity prices
Texas pays about $0.155 per kWh, which is 11% lower 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 Texas. 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.