Where do I find my model volume?

Your slicer shows the model volume (usually in cm³ or ml) in the print statistics. In Cura, it appears in the bottom bar. In PrusaSlicer, check the right panel. Most CAD software can also display volume in the model properties.

Does infill affect weight?

Yes, significantly. A 100% infill print weighs roughly 2-3x more than the same model at 20% infill. The walls contribute a fixed amount of weight, while the interior weight scales linearly with infill percentage.

Why is the actual weight different from the slicer estimate?

Slicer estimates are typically accurate to within 5-10%. Differences come from purge lines, skirt/brim material, supports, and the fact that the slicer uses approximate density values. Actual weight may also vary by filament brand.

What density should I use for PLA?

Standard PLA density is 1.24 g/cm³. This can vary slightly (1.20-1.27) between brands and colours. Filled PLAs (wood, carbon fibre) have different densities. The calculator uses typical published values for each material.

3DPrintCalcs

Material Weight Calculator — Part Weight from Volume

Calculate the weight of a printed part from its volume and material density.

Model Volume

From your slicer or CAD

Material

Infill

Wall Count

Line Width

How We Calculate This

Weight Calculation

Solid weight = Volume (cm³) x Density (g/cm³)
Effective fill = Wall fraction + Interior fraction x Infill%
Actual weight = Solid weight x Effective fill ratio
Filament length = Used volume / Filament cross-section area

The calculation accounts for the fact that printed parts are not solid. The walls contribute a fixed solid shell, while the interior is partially filled based on infill percentage.

Frequently Asked Questions

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Last updated: February 2026

All calculations are estimates. Always verify settings with test prints before committing to final prints.