How Much Does a 50-watt electric knife sharpener Cost to Run in Montana?
A 50-watt electric knife sharpener uses 0.05 kWh per hour and costs $0.006 per hour at $0.125/kWh in Montana. Used 0.05 hours a day, that is $0.0003 per day, $0.009 per month and $0.114 per year.
Calculate your own cost
- Per hour
- $0.0060.05 kWh
- Per day
- $0.00030 kWh
- Per week
- $0.0020.02 kWh
- Per month (30 days)
- $0.0090.08 kWh
- Per year
- $0.1140.91 kWh
Formula: watts ÷ 1,000 × hours × rate. Edit any box and every number updates instantly.
People also ask
How much does a 50-watt electric knife sharpener cost per hour?
At $0.125/kWh, it costs $0.006 per hour. The maths: 50 W ÷ 1,000 = 0.05 kWh per hour, × $0.125 = $0.006.
How much does it cost per month?
Used 0.05 hours a day for 30 days, it costs about $0.009 per month and uses 0.08 kWh. Change the hours in the calculator above to match how you use it.
How many kWh does it use?
0 kWh per day, 0.08 kWh per month and 0.91 kWh per year at 0.05 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?
Follow the device instructions and unplug after use. 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 $0.008 and at 30¢ it is $0.023. Find your rate on your bill (total cost ÷ kWh used) and type it into the calculator.
Cost by hours of use in Montana
| Used per day | Energy per day | Cost per day | Cost per month | Cost per year |
|---|---|---|---|---|
| 1 hour | 0.05 kWh | $0.006 | $0.188 | $2.28 |
| 2 hours | 0.1 kWh | $0.013 | $0.375 | $4.56 |
| 3 hours | 0.15 kWh | $0.019 | $0.563 | $6.84 |
| 4 hours | 0.2 kWh | $0.025 | $0.75 | $9.13 |
| 5 hours | 0.25 kWh | $0.031 | $0.938 | $11.41 |
| 6 hours | 0.3 kWh | $0.038 | $1.13 | $13.69 |
| 7 hours | 0.35 kWh | $0.044 | $1.31 | $15.97 |
| 8 hours | 0.4 kWh | $0.05 | $1.50 | $18.25 |
| 9 hours | 0.45 kWh | $0.056 | $1.69 | $20.53 |
| 10 hours | 0.5 kWh | $0.063 | $1.88 | $22.81 |
| 11 hours | 0.55 kWh | $0.069 | $2.06 | $25.09 |
| 12 hours | 0.6 kWh | $0.075 | $2.25 | $27.38 |
| 13 hours | 0.65 kWh | $0.081 | $2.44 | $29.66 |
| 14 hours | 0.7 kWh | $0.088 | $2.63 | $31.94 |
| 15 hours | 0.75 kWh | $0.094 | $2.81 | $34.22 |
| 16 hours | 0.8 kWh | $0.10 | $3.00 | $36.50 |
| 17 hours | 0.85 kWh | $0.106 | $3.19 | $38.78 |
| 18 hours | 0.9 kWh | $0.113 | $3.38 | $41.06 |
| 19 hours | 0.95 kWh | $0.119 | $3.56 | $43.34 |
| 20 hours | 1 kWh | $0.125 | $3.75 | $45.63 |
| 21 hours | 1.05 kWh | $0.131 | $3.94 | $47.91 |
| 22 hours | 1.1 kWh | $0.138 | $4.13 | $50.19 |
| 23 hours | 1.15 kWh | $0.144 | $4.31 | $52.47 |
| 24 hours | 1.2 kWh | $0.15 | $4.50 | $54.75 |
How we worked it out
- Energy per hour: 50 W ÷ 1,000 = 0.05 kWh
- Cost per hour: 0.05 kWh × $0.125 = $0.006
- Cost per day: × 0.05 hours = $0.0003
- Month and year: × 30 days = $0.009, × 365 days = $0.114
Montana electricity prices
Montana pays about $0.125 per kWh, which is 29% lower than the US average of $0.175. The same electric knife sharpener would cost $0.013 a month at the national average.
What it costs in different places
Same 50-watt electric knife sharpener, 0.05 hours a day. Only the local electricity rate changes.
| Place | Rate per kWh | Cost per month |
|---|---|---|
| United States | $0.175 | $0.013 |
| California | $0.32 | $0.024 |
| Texas | $0.155 | $0.012 |
| New York | $0.25 | $0.019 |
| Florida | $0.155 | $0.012 |
| Illinois | $0.17 | $0.013 |
| Pennsylvania | $0.18 | $0.014 |
| Ohio | $0.17 | $0.013 |
| Washington | $0.115 | $0.009 |
About electric knife sharpener running costs
Electric knife sharpeners run for only a short time, so energy cost per use is tiny despite the motor’s rated wattage.
Typical sizes: 50 W, 100 W, 150 W, 250 W.
How to spend less: Follow the device instructions and unplug after use.
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 Montana. 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.