3D Print Time Calculator
Estimate print duration from volume, layer height, speed, and infill.
This tool is for informational and educational purposes only. It is not a substitute for professional financial, medical, legal, or engineering advice. See Terms of Service.
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This calculator estimates how long a 3D print will take using a simplified volumetric model. The result is an approximation. Your slicer will give a more accurate estimate once sliced, but this tool is useful for quick planning before you open a slicer. Here is how each field works:
- Object volume (mm³). You can find this in your CAD software (most show volume in the model properties). For a rough estimate, multiply the bounding box dimensions in mm together and multiply by the approximate fill fraction of the object.
- Layer height. The vertical thickness of each printed layer in mm. Common values: 0.1mm (fine detail), 0.2mm (standard), 0.3mm (fast draft). Thicker layers print faster.
- Nozzle/line width. Usually 100-120% of nozzle diameter. A 0.4mm nozzle typically uses a 0.4-0.48mm line width. Wider lines cover more area per pass.
- Print speed. Your slicer's print speed setting in mm/s. Typical values: 40-60mm/s for quality, 80-150mm/s for fast printing, 200-500mm/s for high-speed printers like Bambu Lab machines.
- Infill percentage. The internal fill density. 15-20% is standard for most functional parts. Decorative prints can use 10%. Structural parts may use 40-100%.
The calculation adjusts for infill using a factor: (0.2 + infill/100 * 0.8) to account for perimeter overhead regardless of infill setting. This is a simplified model and does not account for travel moves, acceleration ramps, or support structures.
About the 3D Print Time Calculator
This tool uses a volumetric time model: effective time equals effective volume divided by (layer height * line width * print speed). Effective volume accounts for infill density. The formula gives a reasonable ballpark for planning purposes. Actual slicer estimates add travel time, acceleration limits, cooling pauses, and retraction overhead, which typically add 20-40% to the raw volumetric estimate.
For production planning, always use your slicer's estimate after slicing. Use this calculator before you have a sliced file, for quick quotes, or to understand how changing layer height or speed affects time. All calculations run in your browser. No data is stored or transmitted.
Frequently Asked Questions
How accurate is this 3D print time estimate?
This calculator uses a simplified volumetric model and typically gives a result within 30-50% of actual print time. It does not account for travel moves, acceleration ramps, cooling pauses, or support structures. For accurate estimates, slice your model in Cura, PrusaSlicer, or Bambu Studio and use the slicer's time estimate. Use this tool for planning before slicing or for quick comparisons between settings.
What print settings most affect 3D print time?
Layer height has the biggest impact on most prints. Doubling layer height (from 0.1mm to 0.2mm) roughly halves print time for tall objects. Print speed also has a large effect, though speed is limited by cooling time, material, and printer capability. Infill percentage matters for dense objects but has less impact on thin-walled prints where perimeters dominate.
Where do I find the volume of my 3D model?
In Fusion 360, right-click the model and select Properties. In Blender, select the object and check the 3D Print Toolbox addon. In Tinkercad, volume is shown in model properties. Alternatively, import the model into PrusaSlicer or Cura, which both show volume in the object properties panel. Most CAD tools report volume in mm³ by default.
How do I make a 3D print faster without losing quality?
The best approach is to increase layer height up to 75% of your nozzle diameter (0.3mm for a 0.4mm nozzle). This cuts time significantly on tall objects with minimal quality loss. Increasing print speed helps on flat, low-detail sections but can cause quality issues on fine features. Reducing infill to 10-15% saves time on solid-looking parts. Switching to a larger nozzle (0.6mm or 0.8mm) is the most impactful change for large functional parts.