3D Print Cost Calculator

3D printing is often described as affordable, but the true cost of a print extends well beyond the price of filament. Every time you run a job, you consume electricity, accumulate wear on your printer, and use a portion of a spool that cost real money. Understanding where these costs come from and how to estimate them accurately helps hobbyists and small businesses price their prints, plan material budgets, and evaluate whether an upgrade to a faster or more efficient machine pays for itself.

Material Cost: The Most Visible Expense

Filament cost is the easiest component to calculate. Most consumer FDM (fused deposition modeling) printers track or estimate the weight of filament used for a given job, typically reported in grams. The cost calculation is straightforward: divide the weight in grams by 1,000 to convert to kilograms, then multiply by the price per kilogram of your filament.

Standard PLA filament typically costs between $15 and $25 per kilogram. PETG generally runs from $20 to $35 per kilogram. Engineering-grade materials like ASA, ABS, TPU, and nylon occupy a wider range from $20 to $60 or more per kilogram, while specialty filaments such as carbon fiber composites or wood-fill can exceed $80 per kilogram.

Slicer software such as PrusaSlicer, Bambu Studio, Cura, or OrcaSlicer typically estimates the weight and volume of filament needed before you send a job to the printer. These estimates are generally accurate to within a few percent, making them a reliable basis for cost calculation even before the print begins.

Electricity Cost: Small but Significant Over Time

Desktop FDM printers typically draw between 100 and 350 watts during active printing. The power draw depends on the machine: entry-level printers often draw around 100 to 150 watts, while enclosed printers with heated chambers may draw 200 to 350 watts. The electricity cost for a single print is calculated by converting watt-hours to kilowatt-hours (divide watts by 1,000) and multiplying by the print duration in hours and the local electricity rate.

At a rate of $0.15 per kWh, a 200-watt printer running for 5 hours consumes 1 kWh, costing $0.15. Over hundreds of prints, electricity costs accumulate to a meaningful figure, particularly for long multi-day prints. Residential electricity rates in the United States average approximately $0.12 to $0.17 per kWh, though rates in some states exceed $0.30 per kWh.

Printer Depreciation: The Hidden Cost

Printer depreciation is the most commonly overlooked cost in home 3D printing. Every print gradually uses up the machine's expected lifespan as motors accumulate wear, belts stretch, extruder components fatigue, and heated bed surfaces degrade. Estimating a depreciation cost per print assigns a portion of the printer's purchase price to each job based on how many hours of its expected lifespan that print consumed.

The formula is: (printer purchase price) divided by (estimated lifespan in hours) multiplied by (print duration in hours). A $300 printer with an estimated lifespan of 2,000 hours has a depreciation rate of $0.15 per hour. A 5-hour print therefore contributes $0.75 in depreciation cost.

Estimated printer lifespans are subjective and depend heavily on maintenance practices, print settings, and material choices. Many hobbyists estimate 1,000 to 3,000 hours of useful life before significant component replacement becomes necessary. Printing at lower speeds, keeping the machine clean, and replacing wear parts proactively all extend effective lifespan.

Total Cost and Cost per Gram

Adding material cost, electricity cost, and depreciation gives the total out-of-pocket cost for a single print. This figure is useful for hobbyists tracking their spending and essential for anyone selling printed parts through platforms like Etsy, local markets, or custom commissions.

Cost per gram divides the total print cost by the filament weight used. This normalizes cost across prints of different sizes and makes it easy to compare efficiency across materials or settings. Note that this calculator does not account for failed prints, operator time, post-processing labor, or consumables like bed adhesives. For a commercial pricing calculation, these factors should be added to the base cost figure.

Reducing Cost: Practical Strategies

Material cost is reduced most effectively by buying filament in larger quantities, taking advantage of sales, and choosing appropriate materials for each job rather than defaulting to premium filaments when standard PLA suffices. Adjusting infill percentage also dramatically changes material use: a 10% infill gyroid pattern uses far less filament than a 40% rectilinear infill, with minimal impact on surface quality for decorative prints.

Electricity cost can be minimized by printing during off-peak hours if your utility offers time-of-use rates, and by using power-saving features. Depreciation cost is addressed by extending the machine's life through regular maintenance: keeping rails clean and lubricated, replacing Bowden tubes before they degrade, and calibrating flow rates to avoid over-extrusion that stresses the extruder motor.