Cost to Run a 100-watt appliance for 20 hours in Utah
Running a 100-watt appliance for 20 hours uses 2 kWh and costs $0.24 at $0.12/kWh in Utah. Do that every day and it adds up to $7.20 a month.
Calculate your own cost
- Per hour
- $0.0120.1 kWh
- Per day
- $0.242 kWh
- Per week
- $1.6814 kWh
- Per month (30 days)
- $7.2060 kWh
- Per year
- $87.60730 kWh
Formula: watts ÷ 1,000 × hours × rate. Edit any box and every number updates instantly.
People also ask
How much does a 100-watt appliance cost per hour?
At $0.12/kWh, it costs $0.012 per hour. The maths: 100 W ÷ 1,000 = 0.1 kWh per hour, × $0.12 = $0.012.
How much does it cost per month?
Used 20 hours a day for 30 days, it costs about $7.20 per month and uses 60 kWh. Change the hours in the calculator above to match how you use it.
How many kWh does it use?
2 kWh per day, 60 kWh per month and 730 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?
Use it for fewer hours, switch to a lower-wattage model, and check whether your utility offers cheaper off-peak rates. Enter your own rate above to see the effect.
Does my electricity rate change the answer?
Yes, a lot. At 10¢ per kWh the monthly cost is $6.00 and at 30¢ it is $18.00. Find your rate on your bill (total cost ÷ kWh used) and type it into the calculator.
Cost by hours of use in Utah
| Used per day | Energy per day | Cost per day | Cost per month | Cost per year |
|---|---|---|---|---|
| 1 hour | 0.1 kWh | $0.012 | $0.36 | $4.38 |
| 2 hours | 0.2 kWh | $0.024 | $0.72 | $8.76 |
| 3 hours | 0.3 kWh | $0.036 | $1.08 | $13.14 |
| 4 hours | 0.4 kWh | $0.048 | $1.44 | $17.52 |
| 5 hours | 0.5 kWh | $0.06 | $1.80 | $21.90 |
| 6 hours | 0.6 kWh | $0.072 | $2.16 | $26.28 |
| 7 hours | 0.7 kWh | $0.084 | $2.52 | $30.66 |
| 8 hours | 0.8 kWh | $0.096 | $2.88 | $35.04 |
| 9 hours | 0.9 kWh | $0.108 | $3.24 | $39.42 |
| 10 hours | 1 kWh | $0.12 | $3.60 | $43.80 |
| 11 hours | 1.1 kWh | $0.132 | $3.96 | $48.18 |
| 12 hours | 1.2 kWh | $0.144 | $4.32 | $52.56 |
| 13 hours | 1.3 kWh | $0.156 | $4.68 | $56.94 |
| 14 hours | 1.4 kWh | $0.168 | $5.04 | $61.32 |
| 15 hours | 1.5 kWh | $0.18 | $5.40 | $65.70 |
| 16 hours | 1.6 kWh | $0.192 | $5.76 | $70.08 |
| 17 hours | 1.7 kWh | $0.204 | $6.12 | $74.46 |
| 18 hours | 1.8 kWh | $0.216 | $6.48 | $78.84 |
| 19 hours | 1.9 kWh | $0.228 | $6.84 | $83.22 |
| 20 hours | 2 kWh | $0.24 | $7.20 | $87.60 |
| 21 hours | 2.1 kWh | $0.252 | $7.56 | $91.98 |
| 22 hours | 2.2 kWh | $0.264 | $7.92 | $96.36 |
| 23 hours | 2.3 kWh | $0.276 | $8.28 | $100.74 |
| 24 hours | 2.4 kWh | $0.288 | $8.64 | $105.12 |
How we worked it out
- Energy per hour: 100 W ÷ 1,000 = 0.1 kWh
- Cost per hour: 0.1 kWh × $0.12 = $0.012
- Cost per day: × 20 hours = $0.24
- Month and year: × 30 days = $7.20, × 365 days = $87.60
Utah electricity prices
Utah pays about $0.12 per kWh, which is 31% lower than the US average of $0.175. The same appliance would cost $10.50 a month at the national average.
What it costs in different places
Same 100-watt appliance, 20 hours a day. Only the local electricity rate changes.
| Place | Rate per kWh | Cost per month |
|---|---|---|
| United States | $0.175 | $10.50 |
| California | $0.32 | $19.20 |
| Texas | $0.155 | $9.30 |
| New York | $0.25 | $15.00 |
| Florida | $0.155 | $9.30 |
| Illinois | $0.17 | $10.20 |
| Pennsylvania | $0.18 | $10.80 |
| Ohio | $0.17 | $10.20 |
| Washington | $0.115 | $6.90 |
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 Utah. 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.