Cost to Run a 1,500-watt ductless mini split for 20 hours in Washington
Running a 1,500-watt ductless mini split for 20 hours uses 30 kWh and costs $3.45 at $0.115/kWh in Washington. Do that every day and it adds up to $103.50 a month.
Calculate your own cost
- Per hour
- $0.1731.5 kWh
- Per day
- $3.4530 kWh
- Per week
- $24.15210 kWh
- Per month (30 days)
- $103.50900 kWh
- Per year
- $1,259.2510,950 kWh
Formula: watts ÷ 1,000 × hours × rate. Edit any box and every number updates instantly.
People also ask
How much does a 1,500-watt ductless mini split cost per hour?
At $0.115/kWh, it costs $0.173 per hour. The maths: 1,500 W ÷ 1,000 = 1.5 kWh per hour, × $0.115 = $0.173.
How much does it cost per month?
Used 20 hours a day for 30 days, it costs about $103.50 per month and uses 900 kWh. Change the hours in the calculator above to match how you use it.
How many kWh does it use?
30 kWh per day, 900 kWh per month and 10,950 kWh per year at 20 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?
Clean indoor filters and set a steady temperature instead of frequent large changes. 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 $90.00 and at 30¢ it is $270.00. 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 | 1.5 kWh | $0.173 | $5.18 | $62.96 |
| 2 hours | 3 kWh | $0.345 | $10.35 | $125.93 |
| 3 hours | 4.5 kWh | $0.518 | $15.53 | $188.89 |
| 4 hours | 6 kWh | $0.69 | $20.70 | $251.85 |
| 5 hours | 7.5 kWh | $0.863 | $25.88 | $314.81 |
| 6 hours | 9 kWh | $1.04 | $31.05 | $377.78 |
| 7 hours | 10.5 kWh | $1.21 | $36.23 | $440.74 |
| 8 hours | 12 kWh | $1.38 | $41.40 | $503.70 |
| 9 hours | 13.5 kWh | $1.55 | $46.58 | $566.66 |
| 10 hours | 15 kWh | $1.73 | $51.75 | $629.63 |
| 11 hours | 16.5 kWh | $1.90 | $56.93 | $692.59 |
| 12 hours | 18 kWh | $2.07 | $62.10 | $755.55 |
| 13 hours | 19.5 kWh | $2.24 | $67.28 | $818.51 |
| 14 hours | 21 kWh | $2.42 | $72.45 | $881.48 |
| 15 hours | 22.5 kWh | $2.59 | $77.63 | $944.44 |
| 16 hours | 24 kWh | $2.76 | $82.80 | $1,007.40 |
| 17 hours | 25.5 kWh | $2.93 | $87.98 | $1,070.36 |
| 18 hours | 27 kWh | $3.11 | $93.15 | $1,133.33 |
| 19 hours | 28.5 kWh | $3.28 | $98.33 | $1,196.29 |
| 20 hours | 30 kWh | $3.45 | $103.50 | $1,259.25 |
| 21 hours | 31.5 kWh | $3.62 | $108.68 | $1,322.21 |
| 22 hours | 33 kWh | $3.80 | $113.85 | $1,385.18 |
| 23 hours | 34.5 kWh | $3.97 | $119.03 | $1,448.14 |
| 24 hours | 36 kWh | $4.14 | $124.20 | $1,511.10 |
How we worked it out
- Energy per hour: 1,500 W ÷ 1,000 = 1.5 kWh
- Cost per hour: 1.5 kWh × $0.115 = $0.173
- Cost per day: × 20 hours = $3.45
- Month and year: × 30 days = $103.50, × 365 days = $1,259.25
Washington electricity prices
Washington pays about $0.115 per kWh, which is 34% lower than the US average of $0.175. The same ductless mini split would cost $157.50 a month at the national average.
What it costs in different places
Same 1,500-watt ductless mini split, 20 hours a day. Only the local electricity rate changes.
| Place | Rate per kWh | Cost per month |
|---|---|---|
| United States | $0.175 | $157.50 |
| California | $0.32 | $288.00 |
| Texas | $0.155 | $139.50 |
| New York | $0.25 | $225.00 |
| Florida | $0.155 | $139.50 |
| Illinois | $0.17 | $153.00 |
| Pennsylvania | $0.18 | $162.00 |
| Ohio | $0.17 | $153.00 |
| Washington | $0.115 | $103.50 |
About ductless mini split running costs
Mini-split power varies widely with capacity, efficiency and outdoor conditions. Rated input watts or the energy label gives a better estimate than cooling BTUs alone.
Typical sizes: 700 W, 1,000 W, 1,500 W, 2,500 W.
How to spend less: Clean indoor filters and set a steady temperature instead of frequent large changes.
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 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.