How Much Does It Cost to 3D Print?

The short answer

For a small part you might spend 20 to 50 cents on plastic. That number is real, but it is not the cost. A print also draws power for hours, wears down nozzles and belts, and ties up the machine. Some prints fail and you throw the plastic away. And you spend time loading the file, clearing the bed, and cleaning up the part. Count all of that and a "cheap" print usually costs a few dollars, with your time as the biggest line.

The cost pieces

Five things make up the cost of a print, plus packaging if you sell. Each one is simple math.

Material

This is the filament you actually use. Take the grams the slicer reports, divide by 1000, and multiply by your filament price per kg.

(grams / 1000) × price per kg

Typical PLA and PETG run about $15 to $30 per kg. A 50 g part at $20/kg is 50 / 1000 × 20 = $1.00 of plastic.

Electricity

The printer draws power the whole time it runs. Multiply watts by hours, divide by 1000 to get kWh, then multiply by your rate.

watts × hours / 1000 × kWh rate

A typical FDM printer pulls about 100 to 150 W once the bed is up to temperature. At 120 W for 3 hours that is 0.36 kWh. At $0.15/kWh that is about 5 cents. Power is usually the smallest line on the sheet.

Machine wear and depreciation

The printer is not free and it does not last forever. Spread its price across the hours you expect it to run, then charge that per print hour.

printer price / expected life in hours

A $400 printer you expect to run for 4,000 hours costs about $0.10 per hour in wear. A 3 hour print carries roughly $0.30 of depreciation. This also stands in for the nozzles, belts, and bed sheets you replace over time.

Failed prints

Some prints fail. A bad first layer, a knocked-over part, a clog halfway through. When that happens you lose the plastic and the hours. Add a buffer to every print so the good ones cover the bad ones. Five to fifteen percent of the running cost is a sane range. Tune it down as your success rate climbs.

Your time and labor

This is the piece most people forget, and it usually dwarfs the filament. You slice the file, level or check the bed, start the print, pop the part off when it is done, and clean up stringing or supports. Put an hourly rate on that time. Even 15 minutes of hands-on work at $20/hour is $5, which is more than the plastic, power, and wear combined on a small part.

Post-processing and packaging

If a part needs sanding, priming, gluing, or painting, the consumables and the extra time count too. Selling adds boxes, padding, and shipping. These are easy to leave off a quote and they quietly eat your margin.

A worked example

Say you print a 50 g part. It takes 3 hours on a 120 W printer. Your filament is $20/kg, your power is $0.15/kWh, your printer cost $400 and you expect 4,000 hours from it, and you value your time at $20/hour with about 15 minutes of hands-on work.

• Material: 50 / 1000 × $20 = $1.00
• Electricity: 120 × 3 / 1000 × $0.15 = $0.05
• Machine wear: ($400 / 4000) × 3 = $0.30
• Failure buffer (10% of material, power, and wear): 10% × $1.35 = $0.14
• Labor: 0.25 h × $20 = $5.00

That puts the true cost near $6.49, call it $6.50. The plastic was a dollar. Labor was most of the bill. If you sold this part you would not charge $6.50, you would add a markup. A 50 percent markup makes it about $9.75; doubling the cost makes it $13. The plastic-only view said one dollar, and the real selling price is several times that.

Pricing prints to sell

Cost is what the print takes out of your pocket. Price is what you charge, and it needs a markup on top of cost so the work returns a profit. Decide on a margin and apply it to the full cost, not to the filament alone. The most common beginner mistake is pricing off the plastic and undercharging, which means working for free once labor and failures are counted. If a print costs you $7 to make, $7 is your floor, not your price.

How to cut the cost

• Tune your profiles so prints stop failing. A reliable profile is the cheapest upgrade you can make, because every failure wastes both plastic and hours.
• Lower infill where the part does not need the strength. 15 percent is plenty for most display pieces and uses far less plastic than 50 percent.
• Reduce supports by reorienting the part. Less support means less wasted plastic and less cleanup time.
• Buy filament in bulk. Multi-roll packs drop the price per kg, and your material cost falls on every print.
• Keep the printer maintained. Clean nozzles, tight belts, and a level bed mean fewer failed prints and a longer machine life, which spreads the depreciation thinner.

Let the calculator do it

You do not have to run this math by hand on every job. The 3D print cost and pricing calculator does all of it for you: enter grams and print time, and it adds material, power, wear, a failure buffer, and labor, then applies your markup to suggest a price and show your profit. It remembers your rates, so after the first setup each new quote is two numbers.