3D Print Electricity Cost Calculator
The electricity to run a 3D print is a small but real running cost that filament-only estimates ignore. This calculator multiplies your printer's average power draw by the print time to find energy used in kilowatt-hours, then multiplies by your electricity rate to show the cost of a single print. Measure your printer's average wattage with a plug-in power meter for the most accurate result, and enter the rate from your own utility bill.
3D print electricity cost formula
Energy (kWh) = power (W) / 1,000 * time (hours)
Cost = energy (kWh) * rate (cost per kWh)
This is the standard energy equation: power multiplied by time gives energy. Watts divided by 1,000 converts to kilowatts, and multiplying by hours gives kilowatt-hours, the unit your utility bills.
Worked example
A printer averaging 120 watts runs for 6 hours. Energy = 120 / 1,000 * 6 = 0.72 kWh. At a rate of 0.16 per kWh, cost = 0.72 * 0.16 = 0.12 (12 cents). The bulk of that draw comes from the heated bed; lowering bed temperature or insulating it reduces the figure.
3D print electricity cost: frequently asked questions
How is 3D print electricity cost calculated?
Energy used in kilowatt-hours equals average printer power in watts divided by 1,000, multiplied by print time in hours. Multiply that energy by your electricity rate per kWh to get cost. For example, a 200 W printer running 5 hours uses 1.00 kWh, which at 16 cents per kWh costs 16 cents.
How much power does a 3D printer draw?
Draw depends on the heated bed, hotend, and motors. Many desktop FDM printers average 70 to 250 watts during a print, with the heated bed being the largest consumer. The figure varies by model and bed temperature, so this calculator takes your measured average wattage as a user-editable input. A plug-in power meter gives the most accurate value.
What electricity rate should I use?
Use the rate on your own utility bill, expressed in cost per kilowatt-hour. The U.S. Energy Information Administration publishes average residential electricity prices by state, but your actual rate may differ with tariffs and time-of-use plans, so this calculator uses your entered rate.
Does this include the cost of failed prints?
No. The result is the energy cost of one completed run for the time you enter. Failed prints that consume power without producing a part add to your real running cost; account for them by adding their print time separately.
Official sources
- U.S. Energy Information Administration: Electricity data and average prices.
- U.S. Department of Energy: Estimating appliance and electronic energy use.
Reviewed by the CalculatorHub team, edited by James Graham, 19 June 2026. See our methodology.