3D printing calculators that do the math for you
Stop guessing filament costs, print times, and fit tolerances. Twenty-three free tools for cost, settings, design, and troubleshooting — built for makers, not spreadsheets.
Cost & Materials
Filament Cost Calculator
Estimate the material cost of any print from filament price and weight used.
Filament Weight & Length Converter
Convert between grams and meters for any filament diameter and material.
Spool Remaining Estimator
Weigh a partial spool and find out how much filament is actually left.
Print Cost Estimator
Filament, electricity, and machine time combined into one price to charge.
Material Comparison Chart
PLA, PETG, ABS, TPU, and nylon side by side: temps, strength, and best uses.
Print Settings & Time
Print Time Estimator
Rough print-time estimate from model volume, layer height, and infill.
Infill Percentage Guide
Strength, weight, and material tradeoffs at every infill percentage.
Nozzle Temperature Chart
Starting nozzle temperatures by material, from PLA to nylon.
Bed Temperature Chart
Starting bed temperatures by material, and when to skip the heated bed.
Layer Height Guide
Quality vs. speed tradeoffs at every common layer height.
Design & Fit
Tolerance & Clearance Calculator
Hole and peg clearance for press fits, bearings, and screws.
Shrinkage Compensation Calculator
Scale factor to counter predictable material shrinkage.
Scale-to-Size Calculator
Resize a model to hit an exact target dimension.
Miniature Scale Converter
Convert between common miniature scales and real-world size.
Wall Thickness Calculator
Minimum wall thickness from nozzle diameter and perimeter count.
Overhang & Support Angle Guide
When an overhang needs supports, by angle.
Troubleshooting & Guides
Print Failure Troubleshooting Guide
Stringing, warping, layer shifting, and elephant's foot, diagnosed.
Bed Leveling Guide
Step-by-step manual bed leveling, start to finish.
First-Layer Squish Guide
Get the first layer's squish right before anything else goes wrong.
Nozzle Maintenance Guide
Clearing clogs and keeping a nozzle printing cleanly.
Hardware Reference
Heat-Set Insert Size Chart
Drill sizes and install temps for common threaded inserts.
Screw & Bolt Size Chart
Common screw and bolt sizes and the clearance hole to print for each.
Nozzle Diameter vs. Line Width Chart
Recommended line width range for every common nozzle size.
Why these numbers matter
Every one of these tools solves the same basic problem: a 3D printer only does what its settings tell it to, and most of those settings are numbers a slicer can't guess on your behalf. Filament cost depends on your specific spool price and a part's actual weight, not a generic per-gram average. Fit tolerances depend on your printer's real dimensional accuracy, not just a textbook clearance value copied from someone else's machine. None of this is guesswork once you have real numbers to plug in — it's the same math experienced makers do by hand after a few dozen prints, just faster and without a spreadsheet open in another tab.
When to trust a calculator vs. your slicer
Your slicer is always the better source for anything it computes directly from your actual model and settings — its print time and material weight estimates account for your specific geometry, infill pattern, and travel moves in a way a generic formula never will. These tools are most useful earlier than that: deciding whether a design is worth printing at all, whether a part will actually fit its mating piece, or what settings to start from before you've built or sliced anything. Once you have a sliced file in hand, trust its numbers over any general calculator.