Operating cost

3D Printer Electricity Cost Calculator

Work out what a print costs in electricity from three numbers: average power draw in watts, print time in hours, and your rate per kilowatt-hour. The kWh figure is shown every time so the maths is transparent and checkable against a meter.

Printer & tariff

Average power drawmeasured beats nameplate

Print time

Electricity rate

$ / kWh

Prints per monthfor a running total

120 W ÷ 1000 × 6.00 h = 0.720 kWh × $0.16/kWh = $0.12

Energy per print

$0.12

0.720 kWh

Cost per hour

$0.02

0.120 kWh

kWh per print

0.720 kWh

check it on a meter

Estimated monthly

$1.38

12 prints/mo

The electricity cost formula

energy_kWh  = average_watts ÷ 1000 × print_hours
energy_cost = energy_kWh × rate_per_kWh

Electricity is almost always a small slice of a print’s total cost — usually far below material and machine time — but it is simple to measure accurately and worth getting right. The kilowatt-hour is the unit your utility bills in, so the calculator surfaces it rather than hiding it inside a currency figure.

Measure, don't guess

A plug-in power meter logging a real print gives an average draw that beats any nameplate figure. Nameplate watts are a ceiling reached only while the bed and nozzle heat up.

Related tools

3D printing cost calculator — energy as one layer of a full, sellable quote.
Print time calculator — get the hours from your slicer’s G-code.
Filament cost calculator — the material layer that usually dwarfs energy.

Frequently asked questions

How much electricity does a 3D printer use?

A typical bed-slinger FDM printer averages roughly 100–150 W once the bed and nozzle are hot, though it spikes higher while heating. Multiply average watts by print hours and divide by 1000 to get kilowatt-hours. A 6-hour print at 120 W is about 0.72 kWh.

How do I calculate the electricity cost of a print?

energy_kWh = watts ÷ 1000 × hours, then multiply by your rate per kWh. At $0.16/kWh, that 0.72 kWh print costs about $0.12. The calculator shows the kWh intermediate so you can verify it against a plug meter.

Nameplate watts or measured watts?

Use a measured average if you can — a cheap plug meter reads real draw over a print. Nameplate watts are a maximum, not an average, and will overstate cost. Heated beds and enclosed chambers dominate consumption; the printer draws far less while simply extruding.