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3D printing calculators that give you the exact number to type in
Filament cost, print quotes, e-steps, flow rate, shrinkage, belt tension, test-tower G-code and more — each with the formula and a worked example, so you can check it rather than trust it.
3D printing cost & pricing calculators
All cost tools →Filament, resin, electricity, machine wear and your time — these calculators add it all up and, if you sell prints, tell you what to charge so the marketplace fees don't eat the margin.
Filament Cost Calculator
Cost per gram, per meter and per print from the spool price, with waste and failure allowances.
3D Print Pricing Calculator
Full cost of a print plus markup, and the list price that survives marketplace fees.
Resin Print Cost Calculator
Resin plus IPA, FEP wear, power and consumables — the real cost of an SLA/MSLA print.
3D Printer Electricity Cost Calculator
Power cost per print, per hour, per month and per year from wattage and your kWh price.
3D printer calibration calculators
All calibration tools →Dial in a printer in the right order: extruder steps, then flow, then dimensional accuracy, then speed. Each tool tells you exactly which number to type into your firmware or slicer.
E-Steps Calculator (Marlin & Klipper Rotation Distance)
New e-steps (Marlin) or rotation_distance (Klipper) from a 100 mm extrusion test, with the G-code to set it.
Flow Rate Calculator (Extrusion Multiplier)
Corrected flow / extrusion multiplier from a single-wall cube, as a percentage or a ratio.
Shrinkage Compensation Calculator
Per-axis scale factor from a measured test print, plus XY hole compensation for your slicer.
Layer Height Calculator (Magic Numbers)
Layer heights that land on full Z motor steps for your lead screw, filtered by nozzle size.
Max Volumetric Speed Calculator
Flow in mm³/s from your settings, and the fastest speed your hotend can sustain per layer height.
Belt Tension Calculator
Belt frequency ⇄ tension for GT2 belts, and convert a documented Hz target to your own span.
Temp Tower & Retraction Tower G-code Generator
Download a ready-to-print temperature or retraction test tower as G-code, generated for your printer.
Filament & model calculators
All filament tools →The everyday questions: is there enough filament left, how many meters is 300 g, will this model fit the bed if I scale it, and roughly how long will it take.
Filament Remaining Calculator
Weigh the spool, subtract the tare, and see grams and meters left — and whether a print will make it.
Filament Length to Weight Calculator
Meters ⇄ grams ⇄ cm³ for any filament and diameter, plus a grams-per-meter reference table.
3D Model Scale & Bed Fit Calculator
Scale by %, to a target size, or to fit a printer preset; see new dimensions and volume change.
3D Print Time Estimator
Ballpark hours and grams from model volume, infill, walls and layer height — before you slice.
Reference
Nothing matches that. Try a material, a setting name, or what you're trying to work out.
Built for one niche
Every calculator here is for 3D printing. The defaults, presets and units are the ones you actually use.
Shows the working
Each page explains the formula and walks through a real example, so you can check the result rather than trust it.
Private by design
Everything runs in your browser. Your inputs are remembered on your device only.
Free, no signup
No accounts, no email gates, no watermarks, no limits.
Common questions
Which calculator should I start with?
If you sell prints: the pricing calculator. If prints look wrong: e-steps, then flow rate, then shrinkage, in that order.
Are the results accurate?
The math is exact; the inputs are the limit. Where a value is an estimate (spool tares, hotend flow limits, print time) the page says so and tells you how to measure your own.
Do you store what I enter?
Only in your own browser, so the form is filled in when you come back. Nothing is sent to a server.