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Filament Length → Weight Calculator

Know how much a length of filament weighs — handy for estimating leftovers on a spool or purge amounts.

Enter your numbers

metres

Results update as you type — no button needed.

Result

  • Volume (cm³)—
Weight—

How it's calculated

Cross-section area = π × (diameter/2)². Volume = area × length. Weight = volume × material density. Units are converted to cm³ and grams.

Assumptions
  • Uses a representative density for the chosen material — real spools vary by brand.

FAQ

Which diameter do I have?
Most desktop printers use 1.75 mm filament; some older or industrial machines use 2.85 mm. It's printed on the spool.

Related calculators

Filament Weight → Length CalculatorFilament Cost-per-Gram Calculator3D Print Cost Calculator
Disclaimer: These calculators are provided for guidance only and use representative material constants and published marketplace fee rates (as of June 2026). Real costs vary — always verify against your own figures before pricing or purchasing. PrintProfit is reader-supported and may earn a commission from links to recommended products, at no extra cost to you.