Cost to Run a 500-watt evaporative cooler for 22 hours in Pennsylvania
Running a 500-watt evaporative cooler for 22 hours uses 11 kWh and costs $1.98 at $0.18/kWh in Pennsylvania. Do that every day and it adds up to $59.40 a month.
Calculate your own cost
- Per hour
- $0.090.5 kWh
- Per day
- $1.9811 kWh
- Per week
- $13.8677 kWh
- Per month (30 days)
- $59.40330 kWh
- Per year
- $722.704,015 kWh
Formula: watts ÷ 1,000 × hours × rate. Edit any box and every number updates instantly.
People also ask
How much does a 500-watt evaporative cooler cost per hour?
At $0.18/kWh, it costs $0.09 per hour. The maths: 500 W ÷ 1,000 = 0.5 kWh per hour, × $0.18 = $0.09.
How much does it cost per month?
Used 22 hours a day for 30 days, it costs about $59.40 per month and uses 330 kWh. Change the hours in the calculator above to match how you use it.
How many kWh does it use?
11 kWh per day, 330 kWh per month and 4,015 kWh per year at 22 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?
Use it in dry weather only. In humid air it cools poorly. 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 $33.00 and at 30¢ it is $99.00. 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 | 0.5 kWh | $0.09 | $2.70 | $32.85 |
| 2 hours | 1 kWh | $0.18 | $5.40 | $65.70 |
| 3 hours | 1.5 kWh | $0.27 | $8.10 | $98.55 |
| 4 hours | 2 kWh | $0.36 | $10.80 | $131.40 |
| 5 hours | 2.5 kWh | $0.45 | $13.50 | $164.25 |
| 6 hours | 3 kWh | $0.54 | $16.20 | $197.10 |
| 7 hours | 3.5 kWh | $0.63 | $18.90 | $229.95 |
| 8 hours | 4 kWh | $0.72 | $21.60 | $262.80 |
| 9 hours | 4.5 kWh | $0.81 | $24.30 | $295.65 |
| 10 hours | 5 kWh | $0.90 | $27.00 | $328.50 |
| 11 hours | 5.5 kWh | $0.99 | $29.70 | $361.35 |
| 12 hours | 6 kWh | $1.08 | $32.40 | $394.20 |
| 13 hours | 6.5 kWh | $1.17 | $35.10 | $427.05 |
| 14 hours | 7 kWh | $1.26 | $37.80 | $459.90 |
| 15 hours | 7.5 kWh | $1.35 | $40.50 | $492.75 |
| 16 hours | 8 kWh | $1.44 | $43.20 | $525.60 |
| 17 hours | 8.5 kWh | $1.53 | $45.90 | $558.45 |
| 18 hours | 9 kWh | $1.62 | $48.60 | $591.30 |
| 19 hours | 9.5 kWh | $1.71 | $51.30 | $624.15 |
| 20 hours | 10 kWh | $1.80 | $54.00 | $657.00 |
| 21 hours | 10.5 kWh | $1.89 | $56.70 | $689.85 |
| 22 hours | 11 kWh | $1.98 | $59.40 | $722.70 |
| 23 hours | 11.5 kWh | $2.07 | $62.10 | $755.55 |
| 24 hours | 12 kWh | $2.16 | $64.80 | $788.40 |
How we worked it out
- Energy per hour: 500 W ÷ 1,000 = 0.5 kWh
- Cost per hour: 0.5 kWh × $0.18 = $0.09
- Cost per day: × 22 hours = $1.98
- Month and year: × 30 days = $59.40, × 365 days = $722.70
Pennsylvania electricity prices
Pennsylvania pays about $0.18 per kWh, which is 3% higher than the US average of $0.175. The same evaporative cooler would cost $57.75 a month at the national average.
What it costs in different places
Same 500-watt evaporative cooler, 22 hours a day. Only the local electricity rate changes.
| Place | Rate per kWh | Cost per month |
|---|---|---|
| United States | $0.175 | $57.75 |
| California | $0.32 | $105.60 |
| Texas | $0.155 | $51.15 |
| New York | $0.25 | $82.50 |
| Florida | $0.155 | $51.15 |
| Illinois | $0.17 | $56.10 |
| Pennsylvania | $0.18 | $59.40 |
| Ohio | $0.17 | $56.10 |
| Washington | $0.115 | $37.95 |
About evaporative cooler running costs
Evaporative (swamp) coolers use a fan and a small pump, so they cost a fraction of an air conditioner in dry climates.
Typical sizes: 100 W, 200 W, 300 W, 500 W.
How to spend less: Use it in dry weather only. In humid air it cools poorly.
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.