Cost to Run a 100-watt network switch for 20 hours
Running a 100-watt network switch for 20 hours uses 2 kWh and costs $0.35 at $0.175/kWh. Do that every day and it adds up to $10.50 a month.
Calculate your own cost
- Per hour
- $0.0180.1 kWh
- Per day
- $0.352 kWh
- Per week
- $2.4514 kWh
- Per month (30 days)
- $10.5060 kWh
- Per year
- $127.75730 kWh
Formula: watts ÷ 1,000 × hours × rate. Edit any box and every number updates instantly.
People also ask
How much does a 100-watt network switch cost per hour?
At $0.175/kWh, it costs $0.018 per hour. The maths: 100 W ÷ 1,000 = 0.1 kWh per hour, × $0.175 = $0.018.
How much does it cost per month?
Used 20 hours a day for 30 days, it costs about $10.50 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?
Check the switch’s actual power draw, especially if it supplies power over Ethernet. 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 $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
| Used per day | Energy per day | Cost per day | Cost per month | Cost per year |
|---|---|---|---|---|
| 1 hour | 0.1 kWh | $0.018 | $0.525 | $6.39 |
| 2 hours | 0.2 kWh | $0.035 | $1.05 | $12.78 |
| 3 hours | 0.3 kWh | $0.053 | $1.58 | $19.16 |
| 4 hours | 0.4 kWh | $0.07 | $2.10 | $25.55 |
| 5 hours | 0.5 kWh | $0.088 | $2.63 | $31.94 |
| 6 hours | 0.6 kWh | $0.105 | $3.15 | $38.33 |
| 7 hours | 0.7 kWh | $0.123 | $3.68 | $44.71 |
| 8 hours | 0.8 kWh | $0.14 | $4.20 | $51.10 |
| 9 hours | 0.9 kWh | $0.158 | $4.73 | $57.49 |
| 10 hours | 1 kWh | $0.175 | $5.25 | $63.88 |
| 11 hours | 1.1 kWh | $0.193 | $5.78 | $70.26 |
| 12 hours | 1.2 kWh | $0.21 | $6.30 | $76.65 |
| 13 hours | 1.3 kWh | $0.228 | $6.83 | $83.04 |
| 14 hours | 1.4 kWh | $0.245 | $7.35 | $89.43 |
| 15 hours | 1.5 kWh | $0.263 | $7.88 | $95.81 |
| 16 hours | 1.6 kWh | $0.28 | $8.40 | $102.20 |
| 17 hours | 1.7 kWh | $0.298 | $8.93 | $108.59 |
| 18 hours | 1.8 kWh | $0.315 | $9.45 | $114.98 |
| 19 hours | 1.9 kWh | $0.333 | $9.98 | $121.36 |
| 20 hours | 2 kWh | $0.35 | $10.50 | $127.75 |
| 21 hours | 2.1 kWh | $0.368 | $11.03 | $134.14 |
| 22 hours | 2.2 kWh | $0.385 | $11.55 | $140.53 |
| 23 hours | 2.3 kWh | $0.403 | $12.08 | $146.91 |
| 24 hours | 2.4 kWh | $0.42 | $12.60 | $153.30 |
How we worked it out
- Energy per hour: 100 W ÷ 1,000 = 0.1 kWh
- Cost per hour: 0.1 kWh × $0.175 = $0.018
- Cost per day: × 20 hours = $0.35
- Month and year: × 30 days = $10.50, × 365 days = $127.75
What it costs in different places
Same 100-watt network switch, 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 |
About network switch running costs
A network switch often runs continuously, making its low wattage worth multiplying by all 24 hours. PoE models can draw much more when powering devices.
Typical sizes: 10 W, 20 W, 40 W, 100 W.
How to spend less: Check the switch’s actual power draw, especially if it supplies power over Ethernet.
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. 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.