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Calcimator

FDM Filament Calculator

Calculate filament usage, weight, and length from part volume, infill percentage, and material density.

Inputs

%

Results

Filament weight (g)

6.15

Filament length (m)

2.06

Material volume (cm³)4.96
Effective fill (%)24.8%
Spool used (%)0.62%
Est. material cost ($)$0.15
How to Use This Calculator
  1. Enter Part volume (cm³), Infill percentage (%), and Shell/wall thickness (mm).
  2. Set Material density (g/cm³), Filament diameter (mm), and Spool net weight (g).
  3. Review Filament weight (g) and Filament length (m).
  4. Use Material volume (cm³) and Effective fill (%) to inform your decision.

How the result changes with Part volume (cm³)

Part volume (cm³)Filament weight (g)Filament length (m)
10,0003,075.21,031.06
35,00010,763.23,608.72
65,00019,988.86,701.92
90,00027,676.89,279.58

What each input means

Part volume (cm³)
Total bounding volume of the part in cubic centimeters. Export from your slicer or CAD software.
Infill percentage (%)
Interior fill density. Common: 10-20% (light), 40-60% (strong), 100% (solid).
Shell/wall thickness (mm)
Outer wall thickness. Typically 2-3 perimeters at 0.4mm each = 0.8-1.2mm.
Material density (g/cm³)
Filament density. PLA=1.24, ABS=1.04, PETG=1.27, Nylon=1.14, TPU=1.21.
Filament diameter (mm)
Standard filament diameters: 1.75mm or 2.85mm.
Spool net weight (g)
Net weight of filament on the spool (not including spool). Standard spool is 1000g.

What each result means

Material volume (cm³)
Actual volume of filament to be deposited.
Filament weight (g)
Total weight of filament needed.
Filament length (m)
Total length of filament that will be used.
Effective fill (%)
Combined shell + infill as percentage of total part volume.
Spool used (%)
Percentage of one spool consumed by this print.
Est. material cost ($)
Approximate cost based on typical PLA pricing ($25/kg).

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Part volume (cm³) = 20, Infill percentage (%) = 20, Shell/wall thickness (mm) = 1.2, Material density (g/cm³) = 1.24 = 6 input(s) provided
  2. Calculate Filament weight
    Filament weight = materialVolumeCm3 * materialDensity
    6.15 = 6.15
  3. Calculate Filament length
    Filament length = filamentLengthCm / 100
    2.06 = 2.06
  4. Calculate Material volume
    Material volume = partVolumeCm3 * effectiveFillFraction
    4.96 = 4.96
  5. Calculate Effective fill
    Effective fill = shellFraction + (interiorFraction * infillPct / 100)
    24.8 = 24.8

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