Cost to Run a 40-watt humidifier for 5 hours in Florida
Running a 40-watt humidifier for 5 hours uses 0.2 kWh and costs $0.031 at $0.155/kWh in Florida. Do that every day and it adds up to $0.93 a month.
Calculate your own cost
- Per hour
- $0.0060.04 kWh
- Per day
- $0.0310.2 kWh
- Per week
- $0.2171.4 kWh
- Per month (30 days)
- $0.936 kWh
- Per year
- $11.3273 kWh
Formula: watts ÷ 1,000 × hours × rate. Edit any box and every number updates instantly.
People also ask
How much does a 40-watt humidifier cost per hour?
At $0.155/kWh, it costs $0.006 per hour. The maths: 40 W ÷ 1,000 = 0.04 kWh per hour, × $0.155 = $0.006.
How much does it cost per month?
Used 5 hours a day for 30 days, it costs about $0.93 per month and uses 6 kWh. Change the hours in the calculator above to match how you use it.
How many kWh does it use?
0.2 kWh per day, 6 kWh per month and 73 kWh per year at 5 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?
Pick a cool-mist ultrasonic model if cost matters most. 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 $0.60 and at 30¢ it is $1.80. Find your rate on your bill (total cost ÷ kWh used) and type it into the calculator.
Cost by hours of use in Florida
| Used per day | Energy per day | Cost per day | Cost per month | Cost per year |
|---|---|---|---|---|
| 1 hour | 0.04 kWh | $0.006 | $0.186 | $2.26 |
| 2 hours | 0.08 kWh | $0.012 | $0.372 | $4.53 |
| 3 hours | 0.12 kWh | $0.019 | $0.558 | $6.79 |
| 4 hours | 0.16 kWh | $0.025 | $0.744 | $9.05 |
| 5 hours | 0.2 kWh | $0.031 | $0.93 | $11.32 |
| 6 hours | 0.24 kWh | $0.037 | $1.12 | $13.58 |
| 7 hours | 0.28 kWh | $0.043 | $1.30 | $15.84 |
| 8 hours | 0.32 kWh | $0.05 | $1.49 | $18.10 |
| 9 hours | 0.36 kWh | $0.056 | $1.67 | $20.37 |
| 10 hours | 0.4 kWh | $0.062 | $1.86 | $22.63 |
| 11 hours | 0.44 kWh | $0.068 | $2.05 | $24.89 |
| 12 hours | 0.48 kWh | $0.074 | $2.23 | $27.16 |
| 13 hours | 0.52 kWh | $0.081 | $2.42 | $29.42 |
| 14 hours | 0.56 kWh | $0.087 | $2.60 | $31.68 |
| 15 hours | 0.6 kWh | $0.093 | $2.79 | $33.95 |
| 16 hours | 0.64 kWh | $0.099 | $2.98 | $36.21 |
| 17 hours | 0.68 kWh | $0.105 | $3.16 | $38.47 |
| 18 hours | 0.72 kWh | $0.112 | $3.35 | $40.73 |
| 19 hours | 0.76 kWh | $0.118 | $3.53 | $43.00 |
| 20 hours | 0.8 kWh | $0.124 | $3.72 | $45.26 |
| 21 hours | 0.84 kWh | $0.13 | $3.91 | $47.52 |
| 22 hours | 0.88 kWh | $0.136 | $4.09 | $49.79 |
| 23 hours | 0.92 kWh | $0.143 | $4.28 | $52.05 |
| 24 hours | 0.96 kWh | $0.149 | $4.46 | $54.31 |
How we worked it out
- Energy per hour: 40 W ÷ 1,000 = 0.04 kWh
- Cost per hour: 0.04 kWh × $0.155 = $0.006
- Cost per day: × 5 hours = $0.031
- Month and year: × 30 days = $0.93, × 365 days = $11.32
Florida electricity prices
Florida pays about $0.155 per kWh, which is 11% lower than the US average of $0.175. The same humidifier would cost $1.05 a month at the national average.
What it costs in different places
Same 40-watt humidifier, 5 hours a day. Only the local electricity rate changes.
| Place | Rate per kWh | Cost per month |
|---|---|---|
| United States | $0.175 | $1.05 |
| California | $0.32 | $1.92 |
| Texas | $0.155 | $0.93 |
| New York | $0.25 | $1.50 |
| Florida | $0.155 | $0.93 |
| Illinois | $0.17 | $1.02 |
| Pennsylvania | $0.18 | $1.08 |
| Ohio | $0.17 | $1.02 |
| Washington | $0.115 | $0.69 |
About humidifier running costs
Ultrasonic humidifiers use very little power. Warm-mist and evaporative models use more because they heat water.
Typical sizes: 30 W, 40 W, 50 W, 200 W.
How to spend less: Pick a cool-mist ultrasonic model if cost matters most.
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 Florida. 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.