Prusa Print Cost Calculator
Use this calculator to estimate the true cost of a Prusa 3D print and a suggested selling price. Pull filament grams and print time from PrusaSlicer after slicing your model.
What Is a Prusa Calculator?
A Prusa calculator is a pricing and planning tool for 3D printing jobs made on Prusa printers like the MK4, MINI+, or XL. Most people think only about filament cost, but a realistic print price also includes electricity, wear-and-tear, failed prints, and your desired margin.
If you sell prints on Etsy, local markets, or to engineering clients, this step is essential. Without a cost model, you can underprice your work and lose money even when orders are coming in.
Why Costing Matters for Prusa Users
- Protect your profit: Material-only pricing is usually too low.
- Quote faster: You can give clients immediate numbers from PrusaSlicer stats.
- Compare materials: PETG, ASA, and PLA often have very different real costs.
- Scale confidently: Better pricing helps when moving from hobby prints to production runs.
How to Use This Calculator
1) Slice your part in PrusaSlicer
After slicing, note the filament used (g) and estimated print time. These are your two most important inputs.
2) Enter your filament economics
If your spool costs $24.99 and weighs 1000g, then each gram costs about $0.025. The calculator does this math automatically and applies it to the part weight.
3) Add power and overhead
For many home setups, a typical average draw of 80–150W is reasonable for a Prusa desktop machine. Add electricity rate, a small overhead amount, and a failure buffer.
4) Set your target margin
The margin field gives a practical suggested selling price. You can still round up for marketplace fees, shipping complexity, or rush jobs.
Core Formula (Simplified)
Material Cost = (Filament g / Spool g) × Spool Price
Energy Cost = (Hours × Watts / 1000) × Electricity Rate
Base Cost = Material + Energy + Other Costs
True Cost = Base Cost × (1 + Failure Buffer)
Suggested Price = True Cost × (1 + Profit Margin)
Practical Pricing Tips
- Track real failures monthly: If your print farm is stable, your failure buffer might be 5%. If you print difficult geometries, it may be 15–20%.
- Separate labor from machine time: If your service includes design edits, charge for that separately.
- Use material profiles: Keep one cost template for PLA, one for PETG, one for ASA, etc.
- Include post-processing: Sanding, support cleanup, and assembly can exceed raw print cost.
Common Mistakes to Avoid
Ignoring non-filament costs
Nozzles, sheets, failed first layers, test prints, and packaging all add up. A small fixed overhead per part often fixes this.
Using unrealistic print power assumptions
Power draw is dynamic during a print. If possible, use a smart plug meter and average several jobs for better numbers.
Pricing only by competitors
Competitor pricing can help, but your own machine reliability, speed, and finishing quality determine your true cost structure.
Who Should Use a Prusa Calculator?
- Hobbyists selling occasional custom prints
- Etsy shop owners and marketplace sellers
- Makerspaces quoting member projects
- Prototype labs and engineering freelancers
- Small 3D print farm operators
Final Thoughts
A good Prusa calculator turns guesswork into a repeatable pricing process. Once you build the habit of reading filament and time directly from PrusaSlicer, quoting becomes fast, consistent, and profitable. Start with this calculator, compare against actual results for a few weeks, and then fine-tune your overhead and margin to match your business goals.