Cost to Run a 20-watt evaporative humidifier for 15 hours in New York
Running a 20-watt evaporative humidifier for 15 hours uses 0.3 kWh and costs $0.075 at $0.25/kWh in New York. Do that every day and it adds up to $2.25 a month.
Calculate your own cost
- Per hour
- $0.0050.02 kWh
- Per day
- $0.0750.3 kWh
- Per week
- $0.5252.1 kWh
- Per month (30 days)
- $2.259 kWh
- Per year
- $27.38110 kWh
Formula: watts ÷ 1,000 × hours × rate. Edit any box and every number updates instantly.
People also ask
How much does a 20-watt evaporative humidifier cost per hour?
At $0.25/kWh, it costs $0.005 per hour. The maths: 20 W ÷ 1,000 = 0.02 kWh per hour, × $0.25 = $0.005.
How much does it cost per month?
Used 15 hours a day for 30 days, it costs about $2.25 per month and uses 9 kWh. Change the hours in the calculator above to match how you use it.
How many kWh does it use?
0.3 kWh per day, 9 kWh per month and 110 kWh per year at 15 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 the unit as directed and use a humidistat to avoid unnecessary runtime. 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 $0.90 and at 30¢ it is $2.70. Find your rate on your bill (total cost ÷ kWh used) and type it into the calculator.
Cost by hours of use in New York
| Used per day | Energy per day | Cost per day | Cost per month | Cost per year |
|---|---|---|---|---|
| 1 hour | 0.02 kWh | $0.005 | $0.15 | $1.83 |
| 2 hours | 0.04 kWh | $0.01 | $0.30 | $3.65 |
| 3 hours | 0.06 kWh | $0.015 | $0.45 | $5.48 |
| 4 hours | 0.08 kWh | $0.02 | $0.60 | $7.30 |
| 5 hours | 0.1 kWh | $0.025 | $0.75 | $9.13 |
| 6 hours | 0.12 kWh | $0.03 | $0.90 | $10.95 |
| 7 hours | 0.14 kWh | $0.035 | $1.05 | $12.78 |
| 8 hours | 0.16 kWh | $0.04 | $1.20 | $14.60 |
| 9 hours | 0.18 kWh | $0.045 | $1.35 | $16.43 |
| 10 hours | 0.2 kWh | $0.05 | $1.50 | $18.25 |
| 11 hours | 0.22 kWh | $0.055 | $1.65 | $20.08 |
| 12 hours | 0.24 kWh | $0.06 | $1.80 | $21.90 |
| 13 hours | 0.26 kWh | $0.065 | $1.95 | $23.73 |
| 14 hours | 0.28 kWh | $0.07 | $2.10 | $25.55 |
| 15 hours | 0.3 kWh | $0.075 | $2.25 | $27.38 |
| 16 hours | 0.32 kWh | $0.08 | $2.40 | $29.20 |
| 17 hours | 0.34 kWh | $0.085 | $2.55 | $31.03 |
| 18 hours | 0.36 kWh | $0.09 | $2.70 | $32.85 |
| 19 hours | 0.38 kWh | $0.095 | $2.85 | $34.68 |
| 20 hours | 0.4 kWh | $0.10 | $3.00 | $36.50 |
| 21 hours | 0.42 kWh | $0.105 | $3.15 | $38.33 |
| 22 hours | 0.44 kWh | $0.11 | $3.30 | $40.15 |
| 23 hours | 0.46 kWh | $0.115 | $3.45 | $41.98 |
| 24 hours | 0.48 kWh | $0.12 | $3.60 | $43.80 |
How we worked it out
- Energy per hour: 20 W ÷ 1,000 = 0.02 kWh
- Cost per hour: 0.02 kWh × $0.25 = $0.005
- Cost per day: × 15 hours = $0.075
- Month and year: × 30 days = $2.25, × 365 days = $27.38
New York electricity prices
New York pays about $0.25 per kWh, which is 43% higher than the US average of $0.175. The same evaporative humidifier would cost $1.58 a month at the national average.
What it costs in different places
Same 20-watt evaporative humidifier, 15 hours a day. Only the local electricity rate changes.
| Place | Rate per kWh | Cost per month |
|---|---|---|
| United States | $0.175 | $1.58 |
| California | $0.32 | $2.88 |
| Texas | $0.155 | $1.40 |
| New York | $0.25 | $2.25 |
| Florida | $0.155 | $1.40 |
| Illinois | $0.17 | $1.53 |
| Pennsylvania | $0.18 | $1.62 |
| Ohio | $0.17 | $1.53 |
| Washington | $0.115 | $1.04 |
About evaporative humidifier running costs
Evaporative humidifiers mainly power a fan and sometimes a small pump. Their energy use depends on fan speed and model design.
Typical sizes: 20 W, 30 W, 50 W, 80 W.
How to spend less: Clean the unit as directed and use a humidistat to avoid unnecessary runtime.
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 New York. 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.