Dovetail Layout Calculator
Dovetail layout starts with board width, tail count, pin-to-tail proportion and slope. Use the working dovetail spacing calculator to mark repeatable tails, pins and edge half-pins.
Layout equation
The calculator treats the two edge half-pins as one full pin width and solves equal full tails and full pins across the board.
tail_width = board_width / (tail_count * (1 + pin_ratio))
Pins and half-pins
Full pin width is the tail width times the selected ratio. Each edge half-pin is one half of that solved pin width.
Marking boundary
The preview gives finished layout widths, not saw kerf, chisel paring allowance, handed orientation or a printable jig template.
Frequently asked questions
Is this for woodworking dovetails?
Yes. This route opens the woodworking dovetail spacing calculator, not the machining dovetail inspection calculator.
Can it use 1:6 or 1:8 slopes?
Yes. The working calculator includes common slope presets and a custom angle option.
Related pages
- Dovetail spacing calculator - working woodworking tail and pin layout calculator.
- Dovetail angle calculator - slope and side-offset search path.
- Drawer box calculator - size the drawer box before laying out joinery.
- Mortise tenon calculator - adjacent furniture and frame joinery sizing.
- Cut list calculator - prepare stock lengths before joinery layout.