Where do I find the object volume?

Use the geometric solid volume reported by your CAD software or an STL volume calculator. This is the model volume at 100% solid, before the selected infill percentage is applied.

Does this account for supports and brims?

This calculator estimates material for the object itself at the given infill. Add 5–15% extra for supports, brims, or skirts depending on your slicer settings.

What is the density of common filaments?

PLA: 1.24 g/cm³, ABS: 1.04 g/cm³, PETG: 1.27 g/cm³, TPU: 1.21 g/cm³, Nylon: 1.14 g/cm³. The calculator preloads these for you.

Why does filament diameter matter?

The cross-sectional area of the filament determines how much material is in a given length. 1.75 mm and 2.85 mm are the two industry standards; using the wrong value will give incorrect results.

How accurate is this estimate?

This simplified estimate scales solid model volume directly by the selected infill percentage. It does not separately model perimeter walls, top/bottom layers, supports, or brims, so compare against your slicer before printing.

3D Print Filament Calculator

Enter your object volume, infill, filament type, and spool price to get filament length, weight, and cost.

Print Parameters

Solid Model Volume (cm³)

Geometric volume at 100% solid, from CAD or an STL volume tool (also shown as cc).

Infill Percentage: 20%

0% (no material) 100% (solid)

Filament Material

Filament Diameter

1.75 mm 2.85 mm

Cost Estimate (optional)

Spool Weight (g)

Spool Price ($)

Results

Filament Weight

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Filament Length

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Estimated Cost

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Spool Used

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Summary

Enter your object volume, infill, filament type, and spool price to get filament length, weight, and cost.

How it works

Enter the model’s geometric volume in cubic centimeters (cm³) from CAD or an STL volume tool.
Set the infill percentage (0–100%). Higher infill = more material used.
Choose your filament material (PLA, ABS, PETG, etc.) or enter a custom density.
Enter your filament diameter (typically 1.75 mm or 2.85 mm).
Add your spool price and weight to get a per-print cost estimate.
Read the results: filament length in meters, weight in grams, and estimated cost.

Use cases

Estimate material cost before starting a long print job.
Compare costs across different filament materials for the same model.
Calculate how many prints you can get from a single spool.
Budget filament purchases for a batch of identical parts.
Check if a model requires more filament than a partially used spool.

Frequently Asked Questions

Last updated: 2026-09-13 · Reviewed by Nham Vu