Additive Manufacturing worked example

Infill Material at 25% infill percentage: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop infill percentage to 25%, then walk the calculation through step by step. Estimate FDM infill material from solid part volume, infill percentage, material density, and pattern multiplier.

The inputs for this scenario

  • Internal part volume: 85 cm³ (held at the documented default)
  • Infill percentage: 25 % (the input this scenario stresses; the baseline uses 35)
  • Material density: 1.24 g / cm³ (held at the documented default)
  • Pattern multiplier: 1.05 x (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base infill material = internal part volume × infill percentage × material density.
  • Estimated infill material works out to 2,767 g at these inputs, and this is the headline figure for the scenario.
  • Base infill material works out to 2,635 g at these inputs.
  • Pattern multiplier works out to 1.05 x at these inputs.
  • Volume × infill share works out to 2,125 cm³ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where infill percentage sits at 35% and the headline result is 3,873 g, this scenario comes in 28.57% below the baseline at 2,767 g.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to infill percentage, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It models only the infill volume you supply — it excludes perimeters, top and bottom solid layers, and support structures, so for thin-walled parts the shells can dominate and this estimate understates total mass.

Results at a glance

  • Estimated infill material: 2,767 g (headline result)
  • Base infill material: 2,635 g
  • Pattern multiplier: 1.05 x
  • Volume × infill share: 2,125 cm³

Run it with your numbers

  • To rerun this with your own numbers, open the live Infill Material calculator, set infill percentage to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.