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Dovetail layout has a reputation for being mysterious, but most of the mystery comes from trying to remember a ratio instead of understanding the four decisions every joint requires. The angle, the baseline, the spacing, and the face you register from are the whole system. Get those right, and the sawing becomes the easy part.
A dovetail is also more forgiving than its reputation suggests. A joint cut at 1:7 that fits cleanly will outlast a perfect 1:8 that gaps at the shoulder. What the joint will not forgive is inconsistency: tails spaced differently on each corner, baselines set to different depths, or marks transferred from the wrong face.
The Four Layout Decisions
Before you touch a marking tool, decide four things. What angle will the tails use? How deep is the baseline? How many tails, and how are they spaced? Which face and edge are the reference surfaces? Write the answers on the end of the board or on a story stick. Every joint in the project then follows the same recipe, and any small error repeats predictably instead of turning into a mismatch.
The reference surfaces are the foundation. Mark the face side, face edge, and end grain. All gauge work registers off the face side; all square work off the face edge. If you flip a board and mark from the other face, the joint shifts by the thickness difference the planer left.
Choosing the Angle
A dovetail angle is a ratio of run to rise. A 1:6 dovetail rises 1 in for every 6 in it travels, about 9.5 degrees from square. A 1:7 is about 8.1 degrees, and a 1:8 is about 7.1 degrees. A ratio is easier to set with a bevel than an angle in degrees, and it does not depend on a protractor.
The traditional split is 1:6 for softwoods and 1:8 for hardwoods, with 1:7 as a general compromise. Softwoods compress and shear more readily, so a steeper angle gives the tails more bearing against the pins. Hardwoods hold a finer pin, so a shallower angle looks cleaner and leaves more material at the narrow end. For drawer sides in poplar or pine, 1:6 is common; for casework in cherry, walnut, or maple, 1:7 or 1:8. Every joint in the piece should use the same angle; changing angles between corners is visible from across the room.
Set the bevel from a reliable reference rather than eyeballing it. A dovetail gauge with 1:6 and 1:8 edges is quick, and a sliding bevel set from a ratio template works as well. Check by marking a line on scrap and measuring the run over 6 in or 8 in. A bevel that slips produces tails that taper from one side to the other, which is a common cause of a joint that fits at the baseline and gaps at the top.
Setting the Baseline
The baseline marks how deep the tails will sit into the pin board. On a through dovetail it is exactly the thickness of the tail board, because the pin ends will be planed flush after assembly. Mark it on both faces of the pin board with a marking gauge, with the fence registered on the face side.
Use a knife, not a pencil. A knife line severs the fibers and gives the saw a place to start; a pencil line leaves a smudge the saw can wander away from. Set the gauge by measuring the tail board's thickness at several points, not by trusting the nominal dimension. If the board is 0.740 in thick, set the gauge to 0.740 in. That small difference separates a flush surface from a visible step after planing.
Carry the baseline around both edges and check that the ends meet. A baseline 1/64 in higher on one face produces a joint that sits at a slight angle, and the error shows as a gap under one shoulder. Check the gauge against a rule after the first board and again before the last; gauges move when they are set down hard or when the cutter is loose.
Dividing the Width
The number of tails is a visual decision with a structural floor. A 6 in wide drawer side usually looks right with three or four tails; a 12 in carcass side with five or six. Too many tails make the pins fragile. Keep the narrowest part of each pin at least 1/4 in wide, and the edge half pins at least 3/8 in.
Dividers are the right tool because they divide without arithmetic and carry a setting from one board to the next. Dividers set to equal divisions let you step off the width, adjust until the last step lands cleanly, then mark the centers. Work from the center outward for a symmetric layout, or from both edges inward if the piece is asymmetric. Stepping from one edge only accumulates error, and the last tail ends up noticeably narrower than the first.
A common method is to lay out the tail centers first, then use the bevel to mark both sides of each tail. Set the dividers to the desired center-to-center spacing, find the center of the board, and step outward. If the layout ends with a sliver at the edge, increase the spacing slightly and re-step; do not squeeze the last tail in.
Marking and Transferring the Tails
Orient the tail board with its face side toward you and its end grain up. Mark the tails on the end grain and down the face, and mark the angled sides with the bevel. Mark one side of each tail, flip the bevel, and mark the other. Mark the waste with a pencil X, and keep it visible from the sawing position; eight angled lines make it easy to forget which side is waste.
Carry the angled lines down the face to the baseline, but do not carry them across the end grain twice. The end grain shows the full width of the tail at the surface, and the face shows the flare. If the marks disagree, the bevel slipped; trust the face marks and re-mark the end grain. Marking both ends of a drawer side together, with the boards book-matched, keeps the tails aligned across the piece.
Stand the pin board in the vise with its end grain up and its inside face toward you. Place the tail board on top, end grain to end grain, with the baselines aligned and the face edges flush. The outside faces should be coplanar; that is the "one face, one edge" rule. Clamp the pin board before knifing; a board that shifts under the blade is how fingers get cut. Hold the tail board with a clamp and knife the tail lines straight down onto the pin board, keeping the blade against the tail's cheek and vertical to the end grain.
Cut the pins on the waste side of the line and leave the line for paring. A fine dovetail saw technique matters more than the saw itself; a sharp saw with a light touch follows a knife line, while a dull saw jumps it. If the pins are narrow, use a saw with a fine tooth count and a thin plate rather than forcing a larger saw through the cut.
Common Errors and a Repeatable Workflow
The first error is a baseline set from the wrong face; if the pin board is thicker on one edge, the joint sits deeper on one side. The second is transferring the tails with the boards offset front to back, which shifts every pin and leaves a step. The third is spacing that accumulates from one edge, leaving a narrow last tail. The fourth is a bevel that slips between tails, producing a taper. The fifth is a pin too narrow at the baseline, where it splits when tapped together, and the sixth is cutting all the tails before testing one corner.
A layout routine turns dovetails from a test of nerve into a shop process. The order below scales from one drawer to a set.
- Mill the stock and mark the face side and face edge.
- Choose the angle, the tails, and the baseline depth; write them down.
- Gauge the baseline on both faces of every pin board.
- Divide the width, mark the tail centers, and bevel both sides.
- Cut one pair of tails and test the fit against a pin board.
- Adjust, cut the rest, transfer, cut the pins, and pare the baselines.
For a bank of drawers, make a story stick with the tail spacing marked on it and use it for every side. A story stick prevents accumulated error in a way that measuring each board separately cannot. Keep the paring chisels sharp as well; a dovetail chisel needs a flat back and a sharp corner more than a fancy handle. The layout determines whether the joint fits; the chisel only determines whether the baseline is clean.
Frequently Asked Questions
What angle should I use for dovetails?
Use 1:6 for softwoods, 1:8 for hardwoods, and 1:7 as a general compromise. The exact angle matters less than using the same one throughout the piece. If you are unsure, 1:7 in 3/4 in stock is a safe starting point.
How do I set the baseline for a through dovetail?
Set the marking gauge to the actual thickness of the tail board and register the fence on the face side. Mark both faces and both edges of the pin board, and check the setting with a rule after the first board.
How many tails should a drawer have?
For a drawer side 6 to 10 in wide, three or four tails is typical; wider carcass sides may take five or six. Keep the pins at least 1/4 in wide at the baseline and the edge half pins at least 3/8 in.
Why do my dovetails gap at the shoulder?
The usual causes are a baseline set too deep, a tail board that is thinner at one edge, or a pin board that was not flat when the baseline was gauged. Check the baseline depth at both edges, and make sure the mating faces are flush before transferring.
Should I mark the tails on the end grain or the face first?
Mark the end grain and the face together, using the same bevel setting, so the two sets of lines agree. The face lines guide the saw; the end grain lines show the tail's width. If you mark them with different settings, the tail will taper and the joint will fit at one end only.
See Also
- How to Read Wood Grain: Selecting and Machining Boards for Every Project
- 2026's 10 Ultimate Shooting Ear Muffs for Shop-Based Firearm Maintenance
- Stop Warped Miters with the 10 Best Sliding T-Bevels in 2026
- 10 Best Cranked Chisels for Flush Trimming in 2026
- How to Solve Limited Space with 10 Best Folding Workbenches in 2026