How i can caluclate mm^3?

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How i can caluclate mm^3?

Postby alil2096 » 14 Feb 2018, 06:01

Hi guys, how I can calculate the mm^3?

Because KS return automatically the value, but which is the equation?

Thanks ;)
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Re: How i can caluclate mm^3?

Postby EddyMI3D » 15 Feb 2018, 03:12

Usually mm x mm x mm
Ok, I assume you want to have the length of the filament.

The surface of a 1.75 mm filament is (1.75mm/2)^2*pi = 2.4 mm^2 (approx)
The surface of a 3.00 mm filament is (3.00mm/2)^2*pi = 7.1 mm^2 (approx)
Measure the real diameter of your filament

Or just: diameter[mm]/2 x diameter[mm]/2 x 3.1415

Then divide the given volume from KS by the calculated value.

E.g.: 710 mm^3 / 7.1 mm^2 = 100 mm

So you need 100 mm of 3 mm filament
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Re: How i can caluclate mm^3?

Postby alil2096 » 15 Feb 2018, 03:26

No, i want to calculate the mm^3 in printing..

When you make a slice, in the settings's window, you can see the speed in mm/s and mm^3/s..I want to calculate the mm^3/s ;)
In a hurry I had explained yself badly, I missed a "/s", I'm sorry :D
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Re: How i can caluclate mm^3?

Postby pjr » 20 Mar 2018, 09:32

For a 1.75mm filament...

Each 1mm of filament is (as Eddy states), 2.4mm^3, so if you extrude 1mm of filament every second, you are extruding 2.4mm^3/s

An E3D hot end will cope with around 10mm^3/sec, so about 4 linear mm of filament/sec (10/2.4 = 4.167mm).

If you want to calculate based on print speed, layer width and layer height, then you simply multiply the layer width, height and speed to derive the mm^3/s value:


Printing at 0.4mm width, 0.2mm layer height at 50mm/sec, you get 0.4 x 0.2 x 50 = 4mm^3/s (or 4/2.4 = 1.67 linear mm/second of filament).

OK, it may not be quite that simple, but it works for me!

Please note: I do not have any affiliation with KISSlicer. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage or loss.
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