Keycap Profile & Plastic Thickness Calculator
Profile height, PBT and ABS wall thickness against acoustic character, north and south facing LED clearance, and the vendor row code your chosen row is sold under.
On the height figures. Neither Cherry nor the owners of the OEM-profile moulds publish a row-by-row millimetre table, so the profile heights above are the figures in common circulation rather than vendor specifications. The one publicly documented anchor is Signature Plastics DSA at 0.291 inches (7.39 mm) on every row, recorded as the same height as the OEM home row. That anchor comes from a different source and a different measuring basis than the circulating whole-cap heights above, so treat the two as separate scales rather than subtracting one from the other.
On the row codes. Vendors number rows in incompatible directions. Signature Plastics counts down from the top, WASD counts up from the bottom, and KAT inverts Signature Plastics entirely, so an "R1" cap from one vendor and an "R1" from another can be opposite ends of the board. Codes here follow the vendor comparison documented on the Deskthority keyboard profile page. The four rows above are the alphanumeric rows only. The function row is not the same as the number row for every vendor: Signature Plastics calls it 1 but 5 in DCS, KAT calls it 5, and MDA calls it 1 or 0.
Use this with
- Keycap row codes and profile heights: what is documented — the row-code table in full, plus what is and is not documented about profile heights.
- Keycap sizes explained: units, bottom rows, kits — the 19.05 mm grid, bottom-row traps, and space bar stabiliser spacing.
- Keycap wobble: causes, diagnosis and fixes — the MX socket specification, the missing stem specification, and how to isolate a loose cap.
- Keycap wall thickness by material: PBT and ABS in mm — product-specific thickness figures and the limits of material labels.