A dovetail joint is a wood joint in which trapezoidal pins (the “dovetails”) interlock with matching sockets, creating a joint that cannot be pulled apart. The fan shape — wide at the end, narrow at the base — resembles the tail of a swallow. It is the strongest and most decorative wood joint.
How does it work?
The secret is in the shape: the pins are wider at the end than at the base. This means the joint can only be slid together in one direction and cannot come apart the other way.
For a corner joint (two boards at right angles):
- Board A has the tails (trapezoidal pins)
- Board B has the pins (the sockets where the tails fit)
Types
| Type | Description | Application |
|---|---|---|
| Through dovetail | Visible on both sides | Drawers, boxes, decorative furniture |
| Half-blind dovetail | Not visible on one side | Drawer fronts |
| Sliding dovetail | Cut at an angle | Special corner joints |
| Single dovetail | One large dovetail (beam-to-beam) | Beam construction, timber frame |
When do you use a dovetail?
- Drawers — The classic application: joining drawer sides to the front and back
- Boxes and chests — Tool chests, storage boxes
- Decorative furniture — The joint is so attractive that it is intentionally left visible
- Beam connections — A single dovetail joins a cross beam to a main beam
Making a dovetail joint yourself
This is one of the more difficult wood joints to make with hand tools. It requires patience and precision.
Tools
- Dovetail saw (fine-toothed saw)
- Chisel
- Try square and caliper
- Marking gauge or scribe
- Dovetail template (optional, for the correct angle)
The angle
The standard angle for the dovetail is:
- Softwood: 1:6 (approximately 9.5°)
- Hardwood: 1:8 (approximately 7°)
An angle that is too steep is weak; an angle that is too shallow does not grip well.
Basic steps
1. Mark out the tails on board A
2. Cut the tails — Saw along the lines, chisel out the waste between them
3. Transfer to the pins — Use board A as a template on board B
4. Cut and chisel the pins — Stay precisely within the lines
5. Test fit — The joint should fit snugly without forcing
6. Glue — Apply wood glue to all contact
surfaces
> Tip: For those who want it faster: with a router and dovetail bit, you can make a machine-cut dovetail. Less craft, but efficient.
Related terms
- Mortise and tenon joint
- Half-lap joint
- Dowel
- Router