Cost to Run a 100-watt appliance for 20 hours in Pennsylvania
Running a 100-watt appliance for 20 hours uses 2 kWh and costs $0.36 at $0.18/kWh in Pennsylvania. Do that every day and it adds up to $10.80 a month.
Calculate your own cost
- Per hour
- $0.0180.1 kWh
- Per day
- $0.362 kWh
- Per week
- $2.5214 kWh
- Per month (30 days)
- $10.8060 kWh
- Per year
- $131.40730 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 $0.18/kWh, it costs $0.018 per hour. The maths: 100 W ÷ 1,000 = 0.1 kWh per hour, × $0.18 = $0.018.
How much does it cost per month?
Used 20 hours a day for 30 days, it costs about $10.80 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 Pennsylvania
| Used per day | Energy per day | Cost per day | Cost per month | Cost per year |
|---|---|---|---|---|
| 1 hour | 0.1 kWh | $0.018 | $0.54 | $6.57 |
| 2 hours | 0.2 kWh | $0.036 | $1.08 | $13.14 |
| 3 hours | 0.3 kWh | $0.054 | $1.62 | $19.71 |
| 4 hours | 0.4 kWh | $0.072 | $2.16 | $26.28 |
| 5 hours | 0.5 kWh | $0.09 | $2.70 | $32.85 |
| 6 hours | 0.6 kWh | $0.108 | $3.24 | $39.42 |
| 7 hours | 0.7 kWh | $0.126 | $3.78 | $45.99 |
| 8 hours | 0.8 kWh | $0.144 | $4.32 | $52.56 |
| 9 hours | 0.9 kWh | $0.162 | $4.86 | $59.13 |
| 10 hours | 1 kWh | $0.18 | $5.40 | $65.70 |
| 11 hours | 1.1 kWh | $0.198 | $5.94 | $72.27 |
| 12 hours | 1.2 kWh | $0.216 | $6.48 | $78.84 |
| 13 hours | 1.3 kWh | $0.234 | $7.02 | $85.41 |
| 14 hours | 1.4 kWh | $0.252 | $7.56 | $91.98 |
| 15 hours | 1.5 kWh | $0.27 | $8.10 | $98.55 |
| 16 hours | 1.6 kWh | $0.288 | $8.64 | $105.12 |
| 17 hours | 1.7 kWh | $0.306 | $9.18 | $111.69 |
| 18 hours | 1.8 kWh | $0.324 | $9.72 | $118.26 |
| 19 hours | 1.9 kWh | $0.342 | $10.26 | $124.83 |
| 20 hours | 2 kWh | $0.36 | $10.80 | $131.40 |
| 21 hours | 2.1 kWh | $0.378 | $11.34 | $137.97 |
| 22 hours | 2.2 kWh | $0.396 | $11.88 | $144.54 |
| 23 hours | 2.3 kWh | $0.414 | $12.42 | $151.11 |
| 24 hours | 2.4 kWh | $0.432 | $12.96 | $157.68 |
How we worked it out
- Energy per hour: 100 W ÷ 1,000 = 0.1 kWh
- Cost per hour: 0.1 kWh × $0.18 = $0.018
- Cost per day: × 20 hours = $0.36
- Month and year: × 30 days = $10.80, × 365 days = $131.40
Pennsylvania electricity prices
Pennsylvania pays about $0.18 per kWh, which is 3% higher 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 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.