What size is one Gridfinity unit?

One Gridfinity base unit is 42 by 42 mm. Bin heights come in 7 mm increments called u, and a standard baseplate adds about 5 mm under the bins.

How do I measure my drawer for Gridfinity?

Measure the interior width, depth, and usable height of the drawer in millimeters at the narrowest points. Divide width and depth by 42 and round down to get the grid size that fits.

What do I do with the leftover space?

Print spacers to fill leftover margins, or use baseplates with built-in edge fill. Many makers also print a custom baseplate that spans the exact drawer size.

Gridfinity calculator

Measure your drawer, get the grid: baseplate size, margins, and max bin height

Drawer interior width (mm)

Drawer interior depth (mm)

Usable height (mm)

9 × 7 units

Baseplate coverage378 × 294 mm

Leftover margin22 mm × 6 mm

Max bin height7u (54 mm incl. baseplate)

Print suggestionsplit as 5 + 4 by 4 + 3

Based on the standard 42 mm Gridfinity unit, 7 mm height units, and a 5 mm baseplate. Round drawer measurements down at the tightest point.

How to use the result

The grid size tells you the largest baseplate footprint that fits. Most build plates cannot print a full drawer baseplate in one piece, so the print suggestion splits the grid into chunks that fit a 250 mm class printer (5 units is 210 mm). Print the baseplates, snap them in, fill the margins with spacers, then add bins from the collection below.

Frequently asked questions

What size is one Gridfinity unit?: One Gridfinity base unit is 42 by 42 mm. Bin heights come in 7 mm increments called u, and a standard baseplate adds about 5 mm under the bins.
How do I measure my drawer for Gridfinity?: Measure the interior width, depth, and usable height of the drawer in millimeters at the narrowest points. Divide width and depth by 42 and round down to get the grid size that fits.
What do I do with the leftover space?: Print spacers to fill leftover margins, or use baseplates with built-in edge fill. Many makers also print a custom baseplate that spans the exact drawer size.

Now fill the grid

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Grid planned? Get the bins

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