Measure the space. Get the plate that fits. Lay out the bins.
Gridfinity is a 42 mm grid, so the only real question about any drawer is how many whole cells actually fit inside it. Type in the width, depth and height you measured, in millimetres or inches, and DrawerCraft answers that exactly — along with the tallest bin the drawer will still close on, and how much room is left over.
Then it hands you the plate. Drag bins onto it, colour-code them, label what goes in each one, or auto-fill the whole thing in a tap. Preview the finished layout in AR at full size, sitting in the actual drawer, before you commit nine hours of printing to it.
Everything the app knows comes from the published Gridfinity spec — 42 mm cells, 7 mm height units, 41.5 mm bin footprints — applied to the drawer you actually have.
Type in what you measured, in millimetres or inches, then preview the finished layout in AR at full size, sitting in the real drawer.
The largest baseplate that drops in, the tallest bin in 7 mm units, and how much room is left over. Real geometry throughout: 42 mm pitch, 0.5 mm clearance, magnet and screw positions.
Everything snaps to the grid — nothing overlaps, nothing hangs off the edge. Auto-fill covers a plate in one tap, and you can reroll it until you like what you see.
Paint any connected shape on the grid — an L to wrap a corner post, a U around a fixed divider — and save it to your library.
List what goes in each bin and photograph the drawer, then search everything you own from anywhere in the app. Drawers file under furniture, furniture under rooms.
Set your printer's bed from presets or your own numbers. Oversized plates divide into pieces that fit and reassemble into the original.
The detail most calculators miss: a bin's 4.75 mm interlocking base sits inside its first height unit, so a 3U bin stands 21 mm, not 25.75 mm. Add a stacking lip and it's 25.4 mm. DrawerCraft calls that out separately, because it's the difference between a drawer that closes and one that doesn't.
Scroll sideways to see more →

Width, depth and height in mm or inches — columns, rows and max bin height come back instantly.

Every placement is checked against the grid as you go.

Auto-fill, randomize, then change whatever you don't like.

Every stock size, with the usable depth inside each one.

List what's in every bin, then search it from anywhere in the app.

How baseplates split to fit your printer's bed, and how many runs the job takes.
Free on the App Store — measuring, plate fitting and bin layout are all in the free version. Pro is one purchase, never a subscription, and unlocks unlimited rooms and drawers, contents search, print planning, custom shapes, every accent colour, and no ads.
DrawerCraft plans layouts — it does not generate STL files. Print your bins and baseplates from any of the free Gridfinity models already out there; the plan tells you which sizes to print and how many of each. Gridfinity is an open standard created by Zack Freedman. DrawerCraft is an independent app and is not affiliated with him or with any bin vendor.