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3D Print Filament Calculator

Calculate 3D printer filament weight and print cost from filament length, diameter, and density.

Resistor Color Code Decoder (4-Band)

Resistance:
1 kΩ
Tolerance: ±5%
Range: 950 Ω – 1.05 kΩ

3D Print Filament Weight & Cost Calculator

PLA 1.24 · PETG 1.27 · ABS 1.04
Filament Weight:
29.8 g
Print Cost:
$0.60
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Calculation Guide & Reference

3D Printer Filament Weight & Cost Mathematics

3D print filament calculator computes filament weight and print cost from filament length, diameter, and material density.

Standardized Mathematical Formula
Weight (g) = π × (Diameter/2)² × Length × Density

Filament is a cylinder, so its volume follows the standard cylinder volume formula (π r² × length). Multiplying that volume by the material's density gives its weight, and multiplying weight by the price per kilogram gives the print cost.

Variables:
Diameter:Filament diameter, typically 1.75mm or 2.85mm
Length:Length of filament consumed by the print, in meters
Density:Material density in g/cm³ (PLA 1.24, PETG 1.27, ABS 1.04)
How It Works (Step-by-Step)
  • 1Select the filament diameter, enter the length used and material density.
  • 2Enter the price per kilogram of filament.
  • 3View the estimated filament weight and total print cost.
Real-World Numerical Example
5 Meters of 1.75mm PLA

A print uses 5 meters of 1.75mm PLA filament (density 1.24 g/cm³) at $20/kg.

•Radius: 1.75mm ÷ 2 = 0.875mm = 0.0875 cm.
•Volume: π × 0.0875² × 500 cm ≈ 12.03 cm³.
•Weight: 12.03 × 1.24 ≈ 14.9 g.
•Cost: (14.9 ÷ 1000) × $20 ≈ $0.30.
Result: The print uses approximately 14.9 g of filament, costing about $0.30.

Frequently Asked Questions (FAQ)

Volume scales with the square of the radius, so even a small diameter difference (1.75mm vs 2.85mm) changes the weight-per-meter substantially — 2.85mm filament weighs roughly 2.65× more per meter than 1.75mm.

PETG is typically 1.27 g/cm³ and ABS is typically 1.04 g/cm³ — check your specific filament's spec sheet for the most accurate figure, since density varies slightly by manufacturer.

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