Cost to Run a 100-watt 3D printer for 20 hours in Washington
Running a 100-watt 3D printer for 20 hours uses 2 kWh and costs $0.23 at $0.115/kWh in Washington. Do that every day and it adds up to $6.90 a month.
Calculate your own cost
- Per hour
- $0.0120.1 kWh
- Per day
- $0.232 kWh
- Per week
- $1.6114 kWh
- Per month (30 days)
- $6.9060 kWh
- Per year
- $83.95730 kWh
Formula: watts ÷ 1,000 × hours × rate. Edit any box and every number updates instantly.
People also ask
How much does a 100-watt 3D printer cost per hour?
At $0.115/kWh, it costs $0.012 per hour. The maths: 100 W ÷ 1,000 = 0.1 kWh per hour, × $0.115 = $0.012.
How much does it cost per month?
Used 20 hours a day for 30 days, it costs about $6.90 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 the printer’s measured energy or power-monitor data for a precise job estimate. 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 in Washington
| Used per day | Energy per day | Cost per day | Cost per month | Cost per year |
|---|---|---|---|---|
| 1 hour | 0.1 kWh | $0.012 | $0.345 | $4.20 |
| 2 hours | 0.2 kWh | $0.023 | $0.69 | $8.40 |
| 3 hours | 0.3 kWh | $0.035 | $1.04 | $12.59 |
| 4 hours | 0.4 kWh | $0.046 | $1.38 | $16.79 |
| 5 hours | 0.5 kWh | $0.058 | $1.73 | $20.99 |
| 6 hours | 0.6 kWh | $0.069 | $2.07 | $25.19 |
| 7 hours | 0.7 kWh | $0.081 | $2.42 | $29.38 |
| 8 hours | 0.8 kWh | $0.092 | $2.76 | $33.58 |
| 9 hours | 0.9 kWh | $0.104 | $3.11 | $37.78 |
| 10 hours | 1 kWh | $0.115 | $3.45 | $41.98 |
| 11 hours | 1.1 kWh | $0.127 | $3.80 | $46.17 |
| 12 hours | 1.2 kWh | $0.138 | $4.14 | $50.37 |
| 13 hours | 1.3 kWh | $0.15 | $4.49 | $54.57 |
| 14 hours | 1.4 kWh | $0.161 | $4.83 | $58.77 |
| 15 hours | 1.5 kWh | $0.173 | $5.18 | $62.96 |
| 16 hours | 1.6 kWh | $0.184 | $5.52 | $67.16 |
| 17 hours | 1.7 kWh | $0.196 | $5.87 | $71.36 |
| 18 hours | 1.8 kWh | $0.207 | $6.21 | $75.56 |
| 19 hours | 1.9 kWh | $0.219 | $6.56 | $79.75 |
| 20 hours | 2 kWh | $0.23 | $6.90 | $83.95 |
| 21 hours | 2.1 kWh | $0.242 | $7.25 | $88.15 |
| 22 hours | 2.2 kWh | $0.253 | $7.59 | $92.35 |
| 23 hours | 2.3 kWh | $0.265 | $7.94 | $96.54 |
| 24 hours | 2.4 kWh | $0.276 | $8.28 | $100.74 |
How we worked it out
- Energy per hour: 100 W ÷ 1,000 = 0.1 kWh
- Cost per hour: 0.1 kWh × $0.115 = $0.012
- Cost per day: × 20 hours = $0.23
- Month and year: × 30 days = $6.90, × 365 days = $83.95
Washington electricity prices
Washington pays about $0.115 per kWh, which is 34% lower than the US average of $0.175. The same 3D printer would cost $10.50 a month at the national average.
What it costs in different places
Same 100-watt 3D printer, 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 3D printer running costs
A 3D printer’s heated bed and hot end create changing power demand. Average draw varies by material, bed temperature and print duration.
Typical sizes: 100 W, 200 W, 350 W, 500 W.
How to spend less: Use the printer’s measured energy or power-monitor data for a precise job estimate.
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 Washington. 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.