How Much Does An Electric Knife Sharpener Cost to Run in California?
An electric knife sharpener typically uses 100 watts. At 0.05 hours a day and $0.32/kWh in California, it costs about $0.002 per day, $0.048 per month and $0.584 per year.
Calculate your own cost
- Per hour
- $0.0320.1 kWh
- Per day
- $0.0020.01 kWh
- Per week
- $0.0110.04 kWh
- Per month (30 days)
- $0.0480.15 kWh
- Per year
- $0.5841.83 kWh
Formula: watts ÷ 1,000 × hours × rate. Edit any box and every number updates instantly.
People also ask
How much does a 100-watt electric knife sharpener cost per hour?
At $0.32/kWh, it costs $0.032 per hour. The maths: 100 W ÷ 1,000 = 0.1 kWh per hour, × $0.32 = $0.032.
How much does it cost per month?
Used 0.05 hours a day for 30 days, it costs about $0.048 per month and uses 0.15 kWh. Change the hours in the calculator above to match how you use it.
How many kWh does it use?
0.01 kWh per day, 0.15 kWh per month and 1.83 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 $0.015 and at 30¢ it is $0.045. Find your rate on your bill (total cost ÷ kWh used) and type it into the calculator.
Cost by hours of use in California
| Used per day | Energy per day | Cost per day | Cost per month | Cost per year |
|---|---|---|---|---|
| 1 hour | 0.1 kWh | $0.032 | $0.96 | $11.68 |
| 2 hours | 0.2 kWh | $0.064 | $1.92 | $23.36 |
| 3 hours | 0.3 kWh | $0.096 | $2.88 | $35.04 |
| 4 hours | 0.4 kWh | $0.128 | $3.84 | $46.72 |
| 5 hours | 0.5 kWh | $0.16 | $4.80 | $58.40 |
| 6 hours | 0.6 kWh | $0.192 | $5.76 | $70.08 |
| 7 hours | 0.7 kWh | $0.224 | $6.72 | $81.76 |
| 8 hours | 0.8 kWh | $0.256 | $7.68 | $93.44 |
| 9 hours | 0.9 kWh | $0.288 | $8.64 | $105.12 |
| 10 hours | 1 kWh | $0.32 | $9.60 | $116.80 |
| 11 hours | 1.1 kWh | $0.352 | $10.56 | $128.48 |
| 12 hours | 1.2 kWh | $0.384 | $11.52 | $140.16 |
| 13 hours | 1.3 kWh | $0.416 | $12.48 | $151.84 |
| 14 hours | 1.4 kWh | $0.448 | $13.44 | $163.52 |
| 15 hours | 1.5 kWh | $0.48 | $14.40 | $175.20 |
| 16 hours | 1.6 kWh | $0.512 | $15.36 | $186.88 |
| 17 hours | 1.7 kWh | $0.544 | $16.32 | $198.56 |
| 18 hours | 1.8 kWh | $0.576 | $17.28 | $210.24 |
| 19 hours | 1.9 kWh | $0.608 | $18.24 | $221.92 |
| 20 hours | 2 kWh | $0.64 | $19.20 | $233.60 |
| 21 hours | 2.1 kWh | $0.672 | $20.16 | $245.28 |
| 22 hours | 2.2 kWh | $0.704 | $21.12 | $256.96 |
| 23 hours | 2.3 kWh | $0.736 | $22.08 | $268.64 |
| 24 hours | 2.4 kWh | $0.768 | $23.04 | $280.32 |
How we worked it out
- Energy per hour: 100 W ÷ 1,000 = 0.1 kWh
- Cost per hour: 0.1 kWh × $0.32 = $0.032
- Cost per day: × 0.05 hours = $0.002
- Month and year: × 30 days = $0.048, × 365 days = $0.584
California electricity prices
California pays about $0.32 per kWh, which is 83% higher than the US average of $0.175. The same electric knife sharpener would cost $0.026 a month at the national average.
What it costs in different places
Same 100-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 | $0.026 |
| California | $0.32 | $0.048 |
| Texas | $0.155 | $0.023 |
| New York | $0.25 | $0.038 |
| Florida | $0.155 | $0.023 |
| Illinois | $0.17 | $0.026 |
| Pennsylvania | $0.18 | $0.027 |
| Ohio | $0.17 | $0.026 |
| Washington | $0.115 | $0.017 |
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 California. 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.