A8 · Woodworking calculator
Inset Drawer Front Spacing Calculator
Turn one finished cabinet opening into equal inset drawer-front cut sizes and a mark-by-mark vertical schedule. Top, bottom and side reveals plus the gaps between fronts stay explicit, so rounding does not accumulate down the bank.
Free to use · no account needed · calculations stay in this browser · formula reviewed 4 September 2026
Avoid cumulative rounding errors
The calculator subtracts every reveal and gap once, divides the remaining height equally and builds all marking positions from the same full-precision result. That stops a small rounded difference growing down the drawer bank.
Cut size is not drawer-box size. Confirm actual opening squareness, paint or edging build-up, runner instructions, adjustment range and the chosen fitting spacers before machining fronts.
This calculator sizes equal inset fronts only. It does not calculate drawer boxes, runner clearance, overlays or hinge and runner positions.
Blank inset-front check
| Finished opening | _____ × _____ mm |
|---|---|
| Front count | _____ equal fronts |
| Outer reveals | T _____ / B _____ / sides _____ mm |
| Inter-front gap | _____ mm |