3D Printing Math.
Solved.
Fast, accurate calculators for every 3D printing question. Electricity cost, filament cost, print time, profit — with presets for 20+ popular printers.
The calculators
Every tool is free, runs in your browser, and works without signing up.
Electricity Cost Calculator
Calculate the exact electricity cost of any 3D print. Pick your printer, enter print time, get the cost.
20 printer presets
Filament Cost Calculator
Know exactly what a print costs in filament. Supports spool-price math, waste factors, and multi-color prints.
32 filament presets
Print Time Estimator
Estimate how long a print will take without opening a slicer. Great for quick quotes and planning.
Flow rate profiles
Full Print Cost Calculator
The flagship: filament + electricity + labor + machine depreciation + markup. For sellers and print farms.
Etsy + eBay fees included
Why SpoolMath?
Everything free
No paywalls. No "PRO" upsell. No credit card. Other sites charge $9/month for printer presets — ours ship for free, day one.
Instant answers
Pure client-side math. Results update as you type. No page reloads, no loading spinners, no waiting on someone's overloaded API.
Numbers we can defend
Every printer wattage cites its source. Every formula is documented. You can check our math and tell us when we're wrong.
Latest articles
Honest writing on 3D printing cost, speed, and quality.
How Much Does 3D Printer Filament Cost in 2026?
The real price range for PLA, PETG, ABS, TPU, and resin by brand and tier — plus the one metric you should actually use to compare filaments.
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How Long Do 3D Prints Take? Real-World Times for Popular Printers
A realistic breakdown of 3D print times by printer class, with actual examples for small, medium, and large prints on Bambu Lab, Prusa, Creality, and Elegoo machines.
8 min read
How to Price 3D Prints for Sale: The 2026 Seller's Guide
The complete formula for pricing 3D prints on Etsy, eBay, and Amazon Handmade — including the labor costs hobbyist sellers almost always miss.
10 min read