Free Online Calculators
Print weight → cost, filament length & print time
This calculator tells you exactly how much filament your 3D print will use — showing cost, filament length in metres, and estimated print time all at once. Just enter the print weight, filament diameter (1.75 mm or 2.85 mm), and price per kilogram. It's the quickest way to plan your prints and keep material costs under control.
Slice the model first — your slicer reports the filament length and weight for the exact settings you chose. If you only know the length, convert it to volume using the strand's cross-section and multiply by the material density to get grams.
Printing Warhammer 40k models from files you didn't create or license infringes Games Workshop's copyright and trademarks, and selling such prints is clearly unlawful. Printing your own original designs, or officially licensed files, is fine.
Yes, filament and print cost calculators are freely available online, including this one. You enter spool price, spool weight, print weight or length, and optionally printer power and time to get a cost per print.
Divide the spool price by the spool weight in grams — that gives you the cost per gram for your specific material and brand. Standard PLA sits at the low end, while engineering materials like PC, PA or carbon-filled blends cost several times more per gram.
Yes — firearms and firearm components are restricted or banned in most countries, as are lock-picking tools, currency, ID documents and medical devices without approval. Copyrighted or patented designs are also off-limits without permission from the rights holder.
Multiply your cost per gram (spool price divided by spool weight) by one hundred. For a common PLA spool this is a small fraction of the spool price, since a standard spool holds many times that amount.
That is a full standard spool for most brands, so the price equals the spool price you paid. Enter the spool price and weight in the calculator to see the cost per gram and per print.
It's a moderate amount — enough for a medium-sized functional part or several small prints, but only a fraction of a standard spool. Large decorative or structural prints can easily exceed it.
Take the spool price, divide it by the spool weight to get a cost per gram, then multiply by the weight of your print from the slicer. Add electricity cost (printer wattage times print time times your energy tariff) and a waste allowance for purges and failed prints.
One of the most common questions before hitting "print" is simple: how much filament will this actually take? Whether you're running a print farm or just making a single prototype, knowing your filament usage upfront saves money and prevents mid-print failures from running out of material. This calculator converts filament weight to length, estimates material cost, and gives you a realistic print time — all in one place.
The math behind filament usage isn't immediately obvious. A 1 kg spool doesn't tell you how many meters you have — that depends entirely on the material's density and the filament diameter. For example, 1 kg of PLA at 1.75mm diameter gives you roughly 330 meters of filament, while the same weight of TPU (which is denser) yields noticeably less. Getting this wrong means either buying too much material or, worse, watching a long print fail at hour six because you ran out.
Understanding your true print cost matters whether you're pricing jobs for customers or just tracking personal project expenses. A typical 200g benchy or functional bracket in PLA costs anywhere from $0.40 to $1.20 in raw filament depending on the brand and filament type. PETG and ABS sit in a similar price range, while specialty materials like Nylon or flexible TPU can push your per-print cost significantly higher.
This filament calculator lets you input your spool cost, total spool weight, and the estimated filament usage for a given print to get a precise cost per print figure. If you're selling prints, this is your baseline — you still need to factor in electricity, machine wear, and time, but filament cost is usually the biggest variable. On simple-calculator.online, the calculator supports six common materials: PLA, PETG, ABS, TPU, Nylon, and ASA, each with pre-loaded density values so your weight-to-length conversion is accurate without manual lookup.
Print time estimation is also built in. Estimated print time is calculated based on your print volume and typical layer speeds — useful for scheduling jobs or quoting turnaround times. A 50g PLA print at standard 0.2mm layer height typically runs 2–4 hours on a modern desktop FDM printer, while a dense 300g structural part in Nylon might take 12 hours or more.
Start by pulling the filament weight from your slicer software — Cura, PrusaSlicer, and Bambu Studio all display estimated filament usage in grams before you export the G-code. Enter that weight into the calculator along with your material type and spool price, and you'll get the length used, total cost, and estimated time instantly.
For multi-material prints or prints with support structures, run the calculation separately for each material and add the results. It only takes a few extra seconds and gives you a much more accurate total cost breakdown.
Slice your model in any slicer software (Cura, PrusaSlicer, etc.) and check the filament estimate before printing. It will show grams or meters used — either value works with this calculator.
They're usually similar in spool price, but PETG is slightly denser than PLA, so the same weight yields a bit less filament length. Cost per print ends up very close between the two materials.
Yes — the material cost output gives you a solid cost floor for quoting jobs. Add your electricity rate and desired margin on top of the filament cost for a complete pricing model.