Infill Percentage Material Calculator

Work out infill percentage material instantly with clear inputs, formula shown and shareable results.

About Infill Percentage Material Calculator

Walls print solid and only the remaining cavity is filled at the infill density, so material used is walls plus cavity times infill. Because walls are unaffected, raising infill from 20% to 100% on a thin-walled part changes weight far less than it seems it should.

Formula

Material volume

volume = wall volume + (model volume - wall volume) x infill density

Worked example

With the default values below, Infill Percentage Material Calculator returns Material actually printed of 36.000. Change any input above and every figure here is recalculated in your browser.

Inputs used

Model volumeminimum 0.01 cm3: 100 cm3
Volume taken by walls and top or bottomminimum 0 cm3: 20 cm3
Infill densityaccepts 0–100 %: 20 %
Filament densityminimum 0.1 g/cm3: 1.24 g/cm3

Results

Material actually printed: 36.000 cm3
Weight of the print: 44.64 g
Material saved versus a solid print: 64.00%
Hollow interior volume: 80.000 cm3

Step by step

1Values used
2Material volume
3Material actually printed= 36.000 cm3
4Weight of the print= 44.64 g
5Material saved versus a solid print= 64.00
6Hollow interior volume= 80.000 cm3

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is the Infill Percentage Material figure worked out?

volume = wall volume + (model volume - wall volume) x infill density. Walls print solid and only the remaining cavity is filled at the infill density, so material used is walls plus cavity times infill.

Why does this matter?

Because walls are unaffected, raising infill from 20% to 100% on a thin-walled part changes weight far less than it seems it should.

What do I need to enter?

Enter model volume, volume taken by walls and top or bottom, infill density, filament density. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.