What Kerf Should You Use for a Track Saw or Table Saw?

Kerf is the width of material your blade removes.

For many hobbyists, this is one of those numbers that feels too small to matter, until a tight layout starts to get slightly strange at the edges.

The good news is that you do not need to obsess over it. You just need a realistic value for the blade you actually plan to use.

Why kerf matters in Grainline

In Grainline, kerf is not there to make the software feel technical. It is there so the layout matches the blade in your shop.

Kerf affects:

• the spacing the layout needs between parts
• whether tightly packed parts still fit
• how multiple cuts accumulate across a board
• whether narrow strips or near-full sheets still work clean

In many layouts, the difference between 2.2 mm and 3.2 mm will be modest. It becomes more important when parts are packed tightly, strips get narrow, or the sheet is already close to full.

In a real shop, you can often work around a rough kerf setting by measuring from the layout and adjusting as you go. But when Grainline starts with the right kerf, the layout needs fewer mental corrections in the first place.

But if the system also knows the right kerf, the layout stays more honest in the first place. That matters most when parts are tightly packed, strips get narrow, or the board is already close to full.

That is where a small number can stop being a small issue.

Why the right kerf makes layouts easier to use

One reason to set kerf correctly is simple: it lets the layout do more of the work for you.

Once the plan reflects your real blade, you can use the dimensions directly from the layout to measure, mark, and cut from almost any cut line.

That is much nicer than carrying the right drawing into the shop and still doing little plus-minus corrections in your head because the blade width in the software was never quite right.

Start with a practical default

If you do not know your blade yet, these are good mental starting points:

If you want one simple rule:

• for a track saw, start around 2 mm
• for a thin-kerf table saw blade, start around 2.5 mm
• for a standard full-kerf table saw blade, start around 3.2 mm

That is already close enough for most normal layouts.

What those numbers feel like

For many U.S. users, the easiest shortcut is this:

• 3/32" is the common thin-kerf table saw number
• 1/8" is the common standard table saw number
• track saw blades are usually a little thinner than both

So if you are standing in the shop and thinking, I know I do not use a full 1/8" table saw blade, you are probably closer to the thin-kerf range.

Use the blade you will really cut with

Once you know which blade you are using, use that number instead of a generic guess.

The easiest places to check are:

• the blade packaging
• the product page or spec sheet
• the markings printed on the blade itself

Manufacturers usually list kerf, cutting width, or something very close to that.

If you are not sure, a quick test cut in scrap stock is still better than pretending the number does not matter.

Thin kerf or standard kerf?

For hobby work, the choice is usually straightforward.

Thin-kerf blades are often a good fit when you are:

• cutting plywood or sheet goods
• trying to reduce waste
• using a smaller saw or lighter setup

Standard or full-kerf blades are often a better fit when you are:

• pushing through rougher or heavier stock
• prioritizing stiffness and a more traditional table-saw setup
• already using a blade that is known to be around 1/8"

This is not a strict rule. It is just a practical way to think about what is probably in your saw.

A simple working approach

Start with the blade you actually plan to use.

If you know the published kerf, enter it. If you only know the blade type, use the practical defaults above. If the layout is nowhere near a limit, that is usually enough. If the layout is very tight, take the extra minute and use the real number.

That is the right level of care for this setting.

Read Next

• How to Make Your First Cut Plan
• How to Read a Cutting Layout Before You Cut