3D Printing Calculators

3D Print Cost Calculator

Calculate total 3D print cost from filament weight, price per kg, print hours, printer power draw, electricity rate, other costs, and optional markup.

Filament Length Calculator

Find filament length in meters from weight, diameter, and material density, with reference lengths for common spool weights across filament materials.

Filament Weight Calculator

Find filament weight in grams and kilograms from length, diameter, and material density, with reference weights per meter for PLA, ABS, PETG and Nylon.

Infill Percentage Calculator

Calculate the material used and saved at a given infill percentage from total model volume and shell volume for FDM 3D printing projects, with usage guidelines.

Layer Height Calculator

Get the recommended layer height range from nozzle diameter for FDM printing, or calculate total layer count from object height and chosen layer height.

Nozzle Flow Rate Calculator

Calculate volumetric flow rate in mm3 per second and per minute from nozzle diameter, layer height, and print speed, plus optional mass flow rate in grams.

Print Time Estimator

Estimate 3D print duration from model volume, layer height, nozzle diameter, print speed, and setup time using a volumetric flow rate model for FDM printers.

Resin Volume Calculator

Calculate total resin volume and cost, including support structure overhead, from model volume, support percentage, and resin price per liter of resin.

STL Volume Calculator

Calculate model volume in cm3 for box, cylinder, and sphere shapes, or estimate irregular geometry from bounding box dimensions and an estimated fill factor.

Support Material Calculator

Calculate FDM support material weight and cost from model volume, support percentage of that volume, material density, and price per kilogram of filament.

Stop Guessing How Much a Print Will Cost

A 3D print that looks perfect in slicer software can still surprise you with the amount of filament it eats or the hours it takes to finish. These calculators translate slicer settings and material specs into real numbers — grams of filament, hours on the plate, and dollars per part — before the nozzle starts moving.

Popular 3D Printing Calculators

Ten tools cover the numbers that matter most between slicing a model and pulling it off the bed:

  • 3D Print Cost Calculator — adds material, electricity, and machine time into a per-part price for quotes or Etsy listings.
  • Filament Weight Calculator — converts a model's volume into grams needed, so you know if that spool will finish the job.
  • Layer Height Calculator — balances print quality against print time for a given nozzle diameter.
  • Print Time Estimator — projects how many hours a job will hold the printer before you commit to an overnight run.
  • Infill Percentage Calculator — finds the density that gives a part enough strength without wasting filament.

Why Filament Math Is Trickier Than It Looks

Filament is sold by weight, but slicers report volume — and PLA, PETG, ABS, and resin all have different densities, so a spool that lasts 40 hours of PLA prints might run out halfway through the same job in a denser material. Nozzle diameter, layer height, and infill percentage compound on top of that: doubling infill density doesn't just add material, it can also add significant print time since the printer lays down more paths per layer.

Frequently Asked Questions

Does infill percentage affect print time as much as it affects material use?
Often more — at higher densities the printhead has more travel moves per layer, so time scales faster than raw material weight.

Why does my estimated filament weight not match what the spool says?
Filament diameter tolerance (1.75mm vs. true 1.70–1.80mm) and material density both shift the conversion from length to weight.

Explore More

Sizing a machine shop project instead? See the Metalworking Calculators, or plan the lumber for a build with the Woodworking Calculators.