How to Cut a Groove in Wood: 4 Methods and Which One to Use

Most guides use “groove” and “dado” interchangeably, and that is where a lot of confusion starts. A groove runs with the grain, the same direction as the board’s length. A dado runs across the grain. The cut mechanics are nearly identical, but which one you are making affects tear-out risk and which tool makes the most sense. Here are the four real methods, and how to pick between them.

Match the Tool to the Groove

For a handful of grooves in one project, a router with a straight bit and an edge guide is the most flexible choice. For repeated identical grooves across many boards, a table saw with a dado blade set is faster once it is set up. For a single small or decorative groove where power tools feel like overkill, a chisel or a hand plow plane works fine. A rotary tool like a Dremel covers narrow, shallow grooves and tight curves a router bit cannot follow – see our dedicated Dremel groove-cutting guide for that specific method.

Cutting a Groove with a Router

Clamp a straight edge or use an edge guide attachment to keep the router traveling in a dead-straight line. Set the bit depth to no more than one-third of the bit’s diameter per pass – pushing a full-depth groove in one pass overloads the bit and motor and dramatically increases tear-out and burning. For anything deeper than about 3/8 inch, plan on two or three passes, raising the bit slightly between each one. Feed the router against the bit’s rotation (left to right when the bit is in front of you and spinning clockwise) for a cleaner edge and better control.

Cutting a Groove with a Table Saw and Dado Blade

A stacked dado blade set lets you build up an exact width using chippers and outer blades with shims, or an adjustable wobble dado set dials in width with a single rotating dial. Set blade height to the groove’s target depth, set the rip fence to position the groove, and run the board flat against the fence using a push block or push stick – never your hand – to keep fingers clear of the blade. This method is fastest when you need the same groove cut in ten or more boards.

Cutting a Groove by Hand

Score the groove’s outline with a marking gauge first, then remove waste with a chisel slightly narrower than the groove, working from both ends toward the middle to avoid splitting out the far edge. A dedicated plow plane, if you have one, does this faster and more consistently once you get the depth stop set, and it is the traditional tool this job was designed around before routers existed.

Avoiding Tear-Out on the Exit Cut

The most common groove-cutting mistake is tear-out where the bit or blade exits the far end of the board, ripping fibers out instead of cutting them cleanly. Clamp a sacrificial backer board flush against the exit edge before cutting – it gives the fibers something to tear into instead of the workpiece itself, and it works with a router, a table saw, or a chisel equally well.

Frequently Asked Questions

What is the difference between a groove and a dado?

A groove runs with the wood grain, along the length of a board. A dado runs across the grain. The cutting technique is nearly identical for both.

What is the best tool for cutting a groove in wood?

A router with a straight bit and an edge guide is the most flexible choice for most projects. A table saw with a dado blade is faster for repeated identical grooves across many boards.

How deep should a router go in one pass when cutting a groove?

No more than one-third of the bit’s diameter per pass. Deeper grooves should be cut in two or three passes, raising the bit slightly between each one, to avoid overloading the bit and tearing the wood.

How do I stop tear-out at the end of a groove?

Clamp a sacrificial backer board flush against the exit edge before cutting. It gives the wood fibers something to tear into instead of the workpiece, and it works with any cutting method.