3D Printing Budget Calculator Formula
Learn how a 3D printing budget is estimated from filament, waste, electricity and machine-use costs.
The 3D Printing Budget Calculator estimates the direct cost of completing one print. It adjusts the slicer filament estimate for waste, calculates power costs from average energy use, and adds an optional hourly allowance for printer wear and overhead.
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Total Print Budget
Where:
First, add the waste allowance to the model's filament weight and price that material by kilogram. Then add the electricity cost for the print time and the optional hourly machine-use cost.
Variables Explained
| Variable | What It Means | Unit |
|---|---|---|
| W - Model filament weight | Filament weight estimated by the slicer before adding waste. | g |
| A - Waste and failure allowance | Percentage added for supports, brims, purging, test pieces and unsuccessful prints. | percent |
| P - Filament price | Price paid for one kilogram of filament. | currency |
| D - Average printer power draw | Average electrical power used while printing. | watt |
| T - Estimated print time | Expected duration of the print. | hours |
| E - Electricity unit rate | Cost of one kilowatt-hour of electricity. | currency |
| M - Machine-use cost per hour | Optional hourly allowance for printer maintenance, wear and depreciation. | currency |
Step-by-Step Calculation
Add the waste allowance
Increase the slicer estimate by the percentage allowed for additional material and failed prints.
effectiveFilamentWeight = modelWeight * (1 + wasteRate / 100)
Convert grams to kilograms
Filament is priced per kilogram, so the adjusted weight must be converted from grams.
filamentKilograms = effectiveFilamentWeight / 1000
Calculate material cost
Multiply the adjusted filament quantity in kilograms by the price per kilogram.
materialCost = filamentKilograms * filamentPrice
Calculate electricity used
Convert watts to kilowatts, then multiply by print hours to estimate kilowatt-hours used.
energyUsed = (printerPower / 1000) * printTime
Calculate electricity cost
Apply the electricity tariff to the estimated energy use.
electricityCost = energyUsed * electricityRate
Calculate machine-use cost
Multiply print hours by the selected printer overhead allowance.
machineCost = printTime * machineRate
Add all direct costs
The final budget combines material, electricity and machine-use costs.
totalPrintCost = materialCost + electricityCost + machineCost
Worked example: 8-hour PLA print
Adjusted filament weight
100 × (1 + 10 / 100)
110 g
Material cost
(110 / 1000) × 25.00
$2.75
Electricity used
(120 / 1000) × 8
0.96 kWh
Electricity cost
0.96 × 0.20
$0.19
Machine-use cost
8 × 1.00
$8.00
Total print budget
2.75 + 0.19 + 8.00
$10.94
Final Result
Estimated total print budget: $10.94, including $2.75 for filament, $0.19 for electricity and $8.00 for machine use.
Assumptions
- ✓Filament price is entered per kilogram and applies to all material used for the print.
- ✓The waste allowance reasonably represents extra material from supports, brims, purging, calibration and failures.
- ✓Printer power draw is treated as a constant average for the full print duration.
- ✓The machine-use rate is a user-selected overhead allowance, not a measured repair or labour cost.
- ✓Post-processing, packaging, design time, delivery and taxes are excluded unless included separately.
Limitations
- !Actual filament usage can differ from the slicer estimate because of tuning, extrusion variation and unplanned retries.
- !Power draw changes during heating, bed heating, chamber heating, movement and idle periods.
- !A single waste percentage may not fully represent jobs with multiple colours, large purge towers or repeated failed attempts.
- !The result estimates direct print costs, not necessarily a final sale price or project quotation.
Common Mistakes to Avoid
Entering the spool price when the input expects a price per kilogram.
Using the printer's maximum rated wattage rather than a realistic average power draw.
Forgetting to include support material or purge material in the slicer estimate or waste allowance.
Setting the waste allowance to zero for a print with a meaningful risk of failure.
Treating the machine-use rate as labour, even though setup, finishing and packing may need separate costing.
Comparing a one-off print budget with a price that includes shipping, taxes or design work.
Related Formulas
Frequently Asked Questions
What is the formula for 3D printing cost?
This calculator adds adjusted filament cost, electricity cost and machine-use cost. Adjusted filament weight is the slicer weight multiplied by one plus the waste percentage.
How do I calculate filament cost per print?
Multiply the filament weight in kilograms, including any waste allowance, by the filament price per kilogram.
How is 3D printer electricity cost calculated?
Average printer watts are divided by 1,000 and multiplied by print hours to estimate kWh. That result is multiplied by the electricity rate.
Should a waste allowance be included in 3D print cost?
Usually, yes. An allowance can account for supports, skirts, brims, purging, test parts and a reasonable expectation of failed prints.
What should be included in a machine-use rate?
It can represent printer-related overhead such as maintenance, consumable wear and depreciation. Labour and non-printer business costs can be tracked separately.
Ready to calculate your result?
Use the calculator to get instant results with your own inputs.