Prusa Calculator for 3D Print Cost
Estimate the material and energy costs for your FDM 3D prints quickly and accurately. Perfect for hobbyists and professionals using Prusa or other 3D printers.
Enter the price you paid for a 1000g spool of filament.
Get this from your slicer software (e.g., PrusaSlicer, Cura) after slicing the model.
Enter the total print duration in hours. For minutes, use decimals (e.g., 2.5 for 2h 30m).
Average power usage. Original Prusa MK3S+ is ~120W, Mini+ is ~100W.
Find this on your utility bill. The European average is around €0.20-€0.30/kWh.
Estimated Print Cost
Material Cost
€0.00
Electricity Cost
€0.00
Cost per Hour
€0.00
Cost Breakdown
What is a Prusa Calculator?
A prusa calculator, in this context, refers to a tool designed to calculate the costs associated with running a 3D printer, like those made by Prusa Research. While PrusaSlicer includes a basic filament cost feature, a dedicated web calculator allows for more variables, such as electricity rates and printer power consumption, giving a fuller picture of the total expense. This is crucial for anyone from hobbyists tracking their spending to professionals pricing their 3D printing services.
This calculator breaks the cost down into its two main components: material consumption and electricity usage. By inputting values from your slicer and your utility bill, you can get a reliable estimate for any given print job, helping you make informed decisions.
Prusa Calculator Formula and Explanation
The total cost of a 3D print is the sum of the filament cost and the electricity cost. The formulas used in this prusa calculator are straightforward:
1. Material Cost Calculation
Material Cost = (Material Used in grams / 1000) * Cost per kg of Filament
This formula determines the value of the filament consumed. It scales the weight of your print (provided by the slicer) to the price of a full kilogram spool.
2. Electricity Cost Calculation
Electricity Cost = (Printer Power in Watts / 1000) * Print Time in Hours * Cost per kWh
This calculates the cost of the energy your printer uses. It converts the printer’s power rating to kilowatts, multiplies it by the duration of the print, and then applies your local electricity rate.
Variables Table
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| Filament Cost | Price of a standard 1kg spool. | Currency (€, $, etc.) | 20 – 70 |
| Material Used | Weight of the printed object including supports. | grams (g) | 5 – 800 |
| Print Time | Total duration of the 3D print job. | hours (h) | 1 – 100+ |
| Printer Power | Average power consumption during printing. | Watts (W) | 50 – 250 |
| Electricity Cost | Rate charged by your utility provider. | Currency per kilowatt-hour (kWh) | 0.10 – 0.40 |
Practical Examples
Example 1: Small Hobbyist Print (e.g., a Keychain)
- Inputs:
- Filament Cost: €25/kg
- Material Used: 15g
- Print Time: 1.5 hours
- Printer Power: 100W
- Electricity Cost: €0.22/kWh
- Results:
- Material Cost: (15 / 1000) * 25 = €0.38
- Electricity Cost: (100 / 1000) * 1.5 * 0.22 = €0.03
- Total Cost: ~€0.41
Example 2: Large Functional Part
- Inputs:
- Filament Cost: €45/kg (e.g., PETG Carbon Fiber)
- Material Used: 350g
- Print Time: 22 hours
- Printer Power: 150W
- Electricity Cost: €0.22/kWh
- Results:
- Material Cost: (350 / 1000) * 45 = €15.75
- Electricity Cost: (150 / 1000) * 22 * 0.22 = €0.73
- Total Cost: ~€16.48
How to Use This Prusa Calculator
- Enter Filament Cost: Input the price you paid for a 1kg (1000g) spool of filament.
- Enter Material Weight: Slice your model in PrusaSlicer, Cura, or another slicer. The software will show the estimated filament usage in grams. Enter that number here.
- Enter Print Time: Use the slicer’s estimated print time. Convert minutes to a decimal (e.g., 4 hours and 45 minutes is 4.75).
- Set Printer Power: Adjust the average power consumption for your specific 3D printer model. You can find this in its technical specifications or use a power meter for an exact measurement.
- Set Electricity Cost: Check your latest energy bill for the cost per kilowatt-hour (€/kWh).
- Review Results: The calculator will instantly update the total cost, material cost, and electricity cost for your print. The chart provides a visual breakdown.
Key Factors That Affect 3D Printing Cost
Several factors beyond the basic inputs can influence the final cost of a print. Understanding these helps in optimizing your prints for cost-effectiveness.
- Material Type: Standard PLA is cheap, but engineering-grade materials like Polycarbonate, Nylon, or carbon fiber composites can be significantly more expensive.
- Infill Density & Pattern: Higher infill percentages directly increase material usage and print time, raising costs. Choosing an efficient pattern like gyroid can sometimes save material without sacrificing strength.
- Layer Height: Finer layer heights (e.g., 0.1mm) increase print time dramatically compared to coarser layers (e.g., 0.3mm), which in turn increases the electricity cost and machine run time.
- Support Structures: Complex models with many overhangs require extensive support material, which adds to the filament used and post-processing time.
- Print Failures: A failed print consumes material and electricity with no usable part to show for it. Factoring in a small percentage for potential failures is a key part of pricing for a business.
- Printer Maintenance: While not a direct cost per print, printer wear and tear (like nozzle replacement) is an ongoing operational expense to consider for commercial use.
For more insights on cost calculation, you can refer to guides on 3D printing costs or how to calculate prices.
Frequently Asked Questions (FAQ)
How accurate is the material estimate from PrusaSlicer?
PrusaSlicer provides a very accurate estimation of material usage, often within a few percent of the actual weight. For best results, ensure your filament profile in the slicer has the correct density set.
Does the electricity cost really matter?
For small, quick prints, the electricity cost is often negligible, sometimes just a few cents. However, for very long prints (24+ hours) or when running a print farm, the energy costs add up and become a significant part of the total expense.
How do I determine my printer’s power consumption?
The most accurate method is to use a “Kill A Watt” or similar plug-in power meter. Alternatively, you can use the manufacturer’s stated average consumption, which is a good estimate for this calculator.
What about labor and post-processing costs?
This prusa calculator focuses on direct costs (material and energy). For business use, you must also add costs for labor (file preparation, post-processing like support removal) and machine depreciation.
Should I use the weight in meters or grams?
Always use grams. Slicers provide weight in grams, and filament is sold by weight (1kg spools). Using length (meters) is inaccurate because filament diameter can vary slightly.
Does filament brand affect the prusa calculator?
Only in terms of cost per kg. A spool of Prusament might have a different price than a generic brand, which you should enter into the “Filament Cost” field. The physical properties (like density) have a negligible effect on this calculator’s output.
What currency does this calculator use?
The calculator is currency-agnostic. You can use Euros, Dollars, or any other currency, as long as you are consistent across the filament and electricity cost fields.
How can I reduce my printing costs?
Lower infill percentage, increase layer height (for faster prints), orient the model to minimize supports, and prevent print failures through proper printer calibration and maintenance.