Maker and DIY Calculators
3D printer bed fit.
Before you slice, check that the part fits the build volume and how many copies one plate takes. Set a gap between parts and an edge margin for skirts, brims and corners.
Copies per plate = floor((usable length + gap) / (part length + gap)) x floor((usable width + gap) / (part width + gap)), where usable length is the bed minus the margin on both sides. An 80 x 60 mm part with 5 mm gaps on a 220 mm bed with 5 mm margins gives 6 copies flat.
Part and build volume
Fit
Fill the form and press Calculate.
Worked example
The part is 80 x 60 x 40 mm and the bed is 220 x 220 x 250 mm. With 5 mm margins the usable bed is 210 x 210 mm. Flat (40 mm up), 80 mm sides fit floor((210 + 5) / (80 + 5)) = 2 across and 60 mm sides fit floor((210 + 5) / (60 + 5)) = 3 deep, so 6 copies. Trying every orientation, standing the part on its 60 x 40 face (80 mm tall) fits 3 x 4 = 12 copies if you accept the extra height and supports.
How it works
The calculator tests each way of standing the part (each dimension as height) and both 90 degree turns of the footprint. A layout counts only if the height is within Z and the footprint fits the usable bed after the edge margin. The count is a plain grid, so it is a lower bound for irregular parts that a slicer could nest more tightly.
Not included. Non-rectangular beds, delta printers, excluded corners, first-layer brims and supports. Check the result in your slicer before starting a long print.
Sources (opened 2026-10-08). No published figures are used. This is rectangle-packing geometry on the dimensions you enter. Manufacturer build volumes vary, so enter the usable size from your printer's own spec.
FAQ
Will my part fit my 3D printer?
It fits if some orientation has its height within the Z travel and its footprint within the X and Y travel after your edge margin. The calculator tests every orientation when you choose that option.
How many parts fit on one plate?
It counts a grid of parts with your gap between them. A slicer arranging irregular shapes can sometimes fit a few more.
Why keep an edge margin?
Skirts, brims, purge lines and bed clips use the edges, and some printers cannot reach the very corners. Set the margin to what your slicer needs.
Is a bigger gap better?
Not necessarily. A larger gap leaves room for brims and makes parts easier to remove, but fits fewer. Adjust it to your printer and filament.
What if the part is too big?
Split it into pieces that fit and glue or pin them, or try orienting it diagonally in your slicer. This calculator checks axis-aligned fits only.
Disclaimer
Estimates from the numbers you enter, using simple rectangular packing. Verify the plate in your slicer before printing.