ToolNestFree 3D Printing Cost Calculator
Last updated: October 20, 2026
Quick answer: That 'cheap' print isn't as cheap as it feels. Between the filament, the electricity your printer draws for hours, and failed prints, the real cost hides in the details. This free filament cost calculator adds it all up: enter your spool price, how much filament the print used, your electricity rate, and the print time, and get the true per-print cost — plus a selling price with your markup, if you're printing for customers. Runs entirely in your browser; no signup.
🔒 100% Private: Data never leaves your device.
Don't forget failed prints and supports: add ~10–15% to filament used for a realistic average.
✓ Free forever · ✓ No signup · ✓ Tool inputs stay in your browser — never sent to our servers.
How to Use the Filament Cost Calculator
- Enter your spool's price and weight (usually 1 kg) — the calculator derives your cost per gram.
- Enter the filament your print used in grams — your slicer (Cura, PrusaSlicer, Bambu Studio) reports this before printing.
- Enter the print time in hours, your printer's power draw (around 120 W for most bed-slingers), and your electricity rate per kWh.
- Click Calculate Cost: you get material cost, electricity cost, and the true total per print.
- Selling prints? Set a markup percentage and the calculator gives you a price that covers costs plus profit.
Why Use Our Filament Cost Calculator?
- True cost breakdown — filament, electricity, and total shown separately, so you see where the money goes.
- Per-gram pricing — converts any spool size and price into cost per gram automatically.
- Electricity included — most calculators forget power; a 20-hour print at 120 W is real money.
- Sell-price mode — add a markup percentage to price prints for customers without guessing.
- 100% private — everything computes in your browser; no signup, no data stored.
Common Use Cases
- Pricing prints for customers: Know your true cost before quoting — underpricing is the #1 way print farms lose money.
- Choosing between filaments: Compare a $25 PLA spool vs a $40 PETG spool per actual print, not per spool.
- Budgeting a big project: A helmet at 1.2 kg of filament plus 90 hours of power is a very different number than the spool price suggests.
- Deciding print vs buy: Compare your true per-print cost against the Amazon price of the same part — sometimes buying wins.
- Teaching a makerspace class: Show students the full cost stack of a Benchy: grams, watts, hours, and the total nobody expects.
- Quoting a multi-color AMS job: A customer wants a 4-color nameplate — the model is 60 g but the purge estimate is 45 g. Run the total 105 g through the calculator so your quote covers the waste, not just the model.
- Deciding whether a printer upgrade pays off: A faster printer cuts hours (electricity) but a bigger nozzle uses more filament per layer. Compare your current cost stack against the upgrade's projected one before spending $500+.
- Comparing fine vs fast layer heights: A 0.12 mm profile can use 15–25% more filament and double the hours versus 0.2 mm. Run both slicer estimates to see what that extra smoothness actually costs.
Filament Cost Calculator vs Alternatives
- Slicer cost estimates: Cura and PrusaSlicer show a filament cost if you configure it — but they ignore electricity entirely, and the setup is buried in menus.
- Spreadsheet math: Works, and power users do it — but you have to build the formulas and remember your power draw. This is one click.
- Print-farm software: Tools like 3DPrinterOS track costs across fleets — overkill for a hobbyist with one printer. Ours is instant and free.
- Guessing from spool price: The classic mistake: 'the spool was $25 so the print cost pennies.' Filament + 20 hours of electricity is the honest number.
- Online instant-quote services: Services like Craftcloud or Xometry quote your STL in seconds — but you're paying retail plus their margin. This calculator shows what the print actually costs you, so you can see whether the quote is fair or whether DIY wins.
- 'Dollar an hour' rules of thumb: Maker forums love '$1 per print hour' — quick, memorable, and often wrong by 2–3× once filament weight, electricity, and failed prints are counted. A calculator uses your real numbers instead of a meme.
If you run a print farm, farm-management software is worth it. For everyone else — hobbyists, makerspace members, Etsy sellers pricing their first batch — this page gives the honest per-print number in seconds, electricity included.
Frequently Asked Questions
How much does 3D printing actually cost per print?
It depends on filament and time, but a typical small print (85 g of PLA, 6 hours) costs roughly $2–4 in filament plus $0.10–0.30 in electricity. Large prints flip the balance — a 1 kg, 90-hour print can cost $30+ in filament and $2–3 in power. Enter your numbers above for the exact figure.
How do I find how much filament a print uses?
Your slicer tells you before you print: Cura, PrusaSlicer, OrcaSlicer, and Bambu Studio all show estimated filament weight (and length) in the preview. Weigh the finished print on a kitchen scale for the true number — supports and brims count too.
How much electricity does a 3D printer use?
A typical FDM printer draws 60–150 W while printing (bed heaters spike it early, then it settles). At $0.17/kWh, a 10-hour print costs about $0.20 in electricity — small per print, but it adds up across hundreds of prints. Enter your printer's wattage above for your number.
Is PLA or PETG cheaper to print?
Per spool, PLA is usually cheaper — but compare per print: PETG often needs slower speeds (more hours, more electricity) and more supports. This calculator lets you run both scenarios and see the true totals side by side.
How should I price 3D prints to sell?
Start from true cost (filament + electricity + a share of failed prints, ~10–15%), then add your time and a markup. A common rule of thumb is 3–5× material cost, but the calculator's markup mode prices from your actual totals instead of vibes — enter your numbers and pick a margin you're comfortable defending.
Should I include failed prints in my cost?
Yes — every maker has them. A realistic average adds 10–15% to filament used across all prints. If you're pricing for customers, bake it into your markup; if you're budgeting a hobby, add the buffer to the 'filament used' field and the calculator handles the rest.
How do I calculate cost per gram of filament?
Divide the spool price by its weight: a $24.99 spool of 1 kg PLA costs about $0.025/g — two and a half cents per gram. An 85 g print is therefore ~$2.12 in filament before electricity. This calculator does the division for any spool size, including 750 g, 2 kg, and sample coils.
How much does multi-color (AMS) printing waste cost?
A lot more than people expect. Purge towers and filament 'poop' on multi-material printers can add 30–100%+ to the filament a job consumes — a 40 g model can easily eat 70 g total. Check your slicer's purged-filament estimate and enter the TOTAL (model + purge) in the filament-used field; the true cost often doubles.
Does filament density affect print cost?
Barely for price, but it matters for comparisons: PETG (~1.27 g/cm³) is slightly denser than PLA (~1.24 g/cm³), so a 1 kg PETG spool yields slightly less printed volume than 1 kg of PLA. Per-gram pricing is identical math either way — the calculator handles both — but don't assume equal spool weights mean equal numbers of prints.
How much should I charge per hour of print time?
The $1/hour rule of thumb you see online is a starting point, not a price — it ignores your filament, electricity, and failure rate. Better: get true cost from this calculator, then add your time and a margin you can defend. For commissioned work, many sellers land at 3–5× material cost or $1–3/hour of machine time on top of materials.
Is resin printing cheaper than FDM?
Usually not for larger parts: resin costs $30–60+/kg versus $20–25/kg for PLA, and you lose resin to supports, washing, and failed supports — plus gloves, IPA, and curing time that have no FDM equivalent. Resin wins on detail, not on cost. (This calculator is built for FDM filament; resin math needs a different model.)
How accurate is this cost calculator?
Filament math is exact — grams × price-per-gram doesn't lie. The uncertainty lives in the inputs: slicer estimates are usually within 5–10% of real usage, and power draw varies through the print. For your most accurate number, weigh the finished print on a kitchen scale and measure your printer's real wattage with a $15 plug meter.