3D Printing Price Calculator: Estimate Print Cost

A 3D printing price calculator estimates a print’s material cost from its weight and the filament price per unit of mass. Enter the estimated part weight and material price per kilogram to get a simple estimate; it does not include machine time, labor, electricity, finishing, or shipping.

Formula

Material cost = part mass in grams × material price per kilogram ÷ 1,000. The division converts grams to kilograms, so the units cancel to leave a cost in the same currency used for the material price. The calculator also converts the part mass to kilograms as a reference.

• mass is the estimated printed part mass, in grams (g).
• price is the price of the material per kilogram (currency/kg).
• cost is the estimated material cost in the chosen currency.
• kilos is the part mass converted to kilograms (kg).

For example, a price entered as 25 means 25 currency units per kilogram. Use the same currency convention throughout; the calculator does not convert currencies or retrieve current material prices.

Worked Example

With the default inputs, the part mass is 100 g and the material price is 25 currency units/kg.

1. Convert the part mass: 100 g ÷ 1,000 = 0.100 kg.
2. Multiply by the unit price: 0.100 kg × 25 currency units/kg = 2.50 currency units.
3. The estimated material cost is 2.50, and the converted mass is 0.100 kg.

The result is a material-only estimate rounded to two decimal places. If the actual mass or material price differs from the inputs, the estimate changes proportionally.

How to Find the Part Mass

The most useful input is the expected mass of the finished print, not the weight of the whole spool or the volume of the model. A slicer generally estimates material use after you choose print settings such as infill, wall count, supports, and layer height. If its estimate is given in grams, enter that number directly.

If you only know the model’s solid volume, converting volume to mass requires the material’s density and an assumption that the object is fully solid. Real prints are often hollow or partly filled, so the model’s solid volume alone can substantially overstate the amount of filament used. A slicer estimate that reflects the actual toolpath is usually more appropriate.

• Use the mass for the intended settings, including supports if they will be printed.
• Check whether the displayed estimate includes a brim, raft, purge material, or other disposable features.
• If weighing a finished part, remember that its measured mass may include more than the material consumed by the printer, depending on attached supports or added components.

What This Estimate Includes—and Omits

This calculation answers a narrow question: how much material value corresponds to the entered part mass at the entered price per kilogram? It does not determine the full amount to charge for a print. A print service or hobbyist may also account for setup, machine occupancy, failed prints, maintenance, post-processing, packaging, and delivery. Those costs vary by operation and cannot be inferred from mass and material price alone.

Material waste can also make purchased material use higher than the part’s final mass. Supports, purge lines, calibration pieces, and failed attempts consume material that may not remain in the finished object. To include a known allowance, estimate the total material mass consumed and enter that mass instead of the finished-part mass. Avoid adding a waste allowance if the slicer’s material estimate already includes the relevant features.

Likewise, a low material estimate does not necessarily mean a print is quick or inexpensive overall. A small object with fine detail can take considerable machine time, while a larger, simpler object may print more quickly. Weight is useful for estimating material, not a substitute for a complete production quote.

How to Use the Result

Use the material-cost figure to compare designs, estimate the material portion of a project, or check how a change in material price affects a print. For instance, doubling the part mass doubles the calculated cost if the price per kilogram stays the same. Doubling the material price has the same proportional effect if the mass stays fixed.

For a more complete estimate, calculate other cost components separately using information relevant to the specific printer and job. You might record print duration, labor time, finishing requirements, and packaging, then combine those estimates with material cost. Do not treat the calculator’s result as a guaranteed selling price or as a quote from a print provider.

Units matter. Enter grams when the mass field says g, and enter a price per kilogram—not a price per spool or per gram. If a spool contains a different mass than one kilogram, divide its price by its mass in kilograms to obtain a per-kilogram figure before using this calculation. The currency label is generic: choose one currency and enter its numeric amount consistently.

Common Errors and Limitations

• Mixing grams and kilograms: entering a kilogram value in the grams field makes the estimate 1,000 times too small.
• Using a spool price as a kilogram price: a spool may contain less or more than 1 kg, so convert its price using the labeled material mass.
• Ignoring slicer settings: infill, walls, supports, and other toolpath choices affect material use and can change the mass estimate.
• Assuming displayed precision is accuracy: two decimal places are rounding, not a guarantee that the estimate matches actual consumption to the nearest cent.
• Calling it the total print cost: the formula omits time, labor, waste not included in the mass input, and other job-specific expenses.

The calculation is linear and assumes a single material price applies to all of the entered mass. It is not suitable as-is for a multi-material print with separate material costs; calculate each material’s cost separately and add the results. It also cannot account for price changes, discounts, taxes, or local currency conversion.

Frequently Asked Questions

How do I calculate the cost of a 3D print?
For material cost, multiply the estimated material mass in grams by the material price per kilogram, then divide by 1,000. Add separate estimates for labor, machine time, finishing, and other expenses if you need a broader job estimate.

Does the calculator include electricity or printer time?
No. It calculates only the material value represented by the entered mass. Electricity and machine-time estimates require additional information, such as power use, print duration, and the method used to value machine operation.

Should I enter the model’s weight or the slicer’s material estimate?
Use the slicer’s estimated material mass for the chosen print settings when available. A model’s solid volume or an estimate for a different infill or support setup may not represent the filament the printer will actually use.

How do I convert a spool price to a price per kilogram?
Divide the spool price by the spool’s labeled material mass in kilograms. For example, if a spool contains 0.75 kg, divide its price by 0.75 to get a per-kilogram price in the same currency.

Why can the actual material use be higher than the part’s mass?
The printer may also use material for supports, purge lines, brims, rafts, or failed attempts. Check what the slicer estimate includes, and use total consumed material if you want those items reflected in the calculation.

Related

• Total Fixed Cost Formula: How to Calculate It
• Calculate Revenue: Formula, Examples, and Calculator
• Calculating the Break-Even Point

in mass | Part mass | g | 100 | 0
in price | Material price | currency/kg | 25 | 0
out cost | Material cost | currency | mass * price / 1000 | 2
out kilos | Part mass | kg | mass / 1000 | 3