When this helps
Estimate flow from extrusion width, layer height and print speed. Start with Extrusion width; this calculator reports Rounded bead flow.
Tools · Flow and speed
Volumetric flow
Estimate flow from extrusion width, layer height and print speed.
Results
- Rounded bead flow
- 8.141593 mm³/s
- Rectangular estimate flow
- 9 mm³/s
- Rounded bead area
- 0.081416 mm²
Method
Rounded bead area = height × (width − height) + π × height² ÷ 4. Flow = area × speed; rectangular estimate = width × height × speed.
Worked example
Example inputs
- Extrusion width
- 0.45 mm
- Layer height
- 0.2 mm
- Print speed
- 100 mm/s
Calculated outputs
- Rounded bead flow
- 8.141593 mm³/s
- Rectangular estimate flow
- 9 mm³/s
- Rounded bead area
- 0.081416 mm²
How to read the result
With these example inputs, Rounded bead flow is 8.141593 mm³/s. Use that value for the setting or decision named above, and read the other outputs as supporting checks.
Common mistake
Do not leave Extrusion width at the example value of 0.45 mm unless it matches your own measurement.
Assumptions and limits
For supported lines with width at least layer height. Bridge extrusion differs. This does not measure your hotend’s capacity.