Step 1
Measure the clear opening
Measure inside the drawer at its narrowest usable width and depth. Do not use the external cabinet dimensions.
Free planning tool
How many Gridfinity units fit in your drawer?
Measure the clear internal space, choose a sensible installation allowance, and get a 42 mm grid layout plus compatible Graphite Modular drawer-system options.
On this page
Uses the 42 mm Gridfinity pitch and current Graphite Modular CAD envelopes · Updated 14 August 2026
Calculated fit
13 × 9 Gridfinity units
117 total 42 mm cells within 550 × 410 mm of planned usable space.
- Grid area used
- 546 × 378 mm
- Space remaining
- 4 mm × 32 mm
Graphite Modular recommendation
5×4 9U Drawer System
Up to 4 complete systems fit in the planned space (2 across × 2 deep). External envelope: 267 × 201 × 137 mm.
Adjust the example measurements, then calculate to record your result.
Step 2
Check hidden obstructions
Look for tapered sides, runner hardware, screw heads, handles, locks, cable routes, and anything hanging below the drawer above.
Step 3
Keep working clearance
Use a side and top allowance that reflects how the parts will be installed and removed. Increase it if the drawer is not square.
Turn the result into a useful layout
For a loose Gridfinity drawer
Use the calculated columns and rows to plan baseplates and bins. The remaining millimetres are inside your chosen allowance; decide whether to centre the grid, leave access at the front, or reserve a strip for long tools.
For a complete drawer system
Follow the recommended product link, then compare its complete external dimensions with the real installation. The calculator uses the finished frame envelope, not only the nominal Gridfinity footprint.
Planning an electronics drawer? Read the electronics component storage guide for a ready-made box-and-insert setup.
Gridfinity drawer calculator questions
How do I calculate how many Gridfinity units fit in a drawer?
Measure the clear internal width and depth in millimetres, subtract any edge clearance, then divide each usable dimension by the 42 mm Gridfinity pitch. Always round down to complete grid cells.
Why should I leave clearance around a Gridfinity layout?
Real drawers can taper, contain screw heads, or lose space to runners and handles. A small planning allowance reduces the chance that a mathematically exact layout binds or cannot be installed.
Does the calculator include drawer height?
Yes. Height is used to check the CAD-derived external envelope of current Graphite Modular drawer systems. Leave enough top clearance for the drawer to close without contacting the stored items.
Can I use the result with loose Gridfinity bins?
Yes. The grid result is based on the standard 42 mm pitch, so it can be used to plan a loose compatible baseplate and bin layout. Check the exact dimensions and tolerances of the parts you intend to use.
Ready to build it?
Choose a drawer system that fits the space you measured.
Compare the current 5×4 heights, or start with a drawer-ready bundle when you want the box, insert, and drawer hardware planned together.
