---
title: The Complete Router‑Bit Size Chart Every Woodworker Needs (Free PDF)
siteUrl: https://logzly.com/routerbitsreview
author: routerbitsreview (Router Bits Review)
date: 2026-06-17T14:25:19.873247
tags: [routerbits, woodworking, diy]
url: https://logzly.com/routerbitsreview/the-complete-routerbit-size-chart-every-woodworker-needs-free-pdf
---


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Ever stood in front of your [router bit](https://www.amazon.com/s?k=router+bit&tag=organizationtip101-20) drawer, squinting at a tiny label and wondering if that 1/4‑inch spiral will actually cut the groove you need? I’ve been there more times than I can count—measuring, swapping, muttering under my breath—until I finally decided to put everything I learned into one simple, [printable chart](https://www.amazon.com/s?k=printable+chart&tag=organizationtip101-20). It’s free, it lives right here on [Router Bits](https://www.amazon.com/s?k=router+bits&tag=organizationtip101-20) Review, and it’s saved me from more than a few ruined edges.

## Why a size chart belongs on every workbench

Projects have a habit of growing bolder as the year rolls on. Spring decks, summer [garden benches](https://www.amazon.com/s?k=garden+benches&tag=organizationtip101-20), fall live‑edge tables—each calls for a specific cut, and the wrong bit can turn a satisfying joint into a frustrating mess. A quick look at a reliable chart stops you from wasting material, tearing out grain, or shaking your router apart before you even hit the [power switch](https://www.amazon.com/s?k=power+switch&tag=organizationtip101-20). Think of it as a cheat sheet that keeps the fun in woodworking and the frustration out.

## What the chart actually covers

### Standard shank diameters

Most routers accept either a 1/4‑inch or a 1/2‑inch shank. The chart lists both so you can instantly see which bits will slide into your collet without any mental math.

- **1/4‑inch shank** – Ideal for lighter work, compact routers, and those tight‑spot jobs where a bulkier bit just won’t fit.
- **1/2‑inch shank** – Offers extra rigidity, less vibration, and is the go‑to for heavy cuts, large profile bits, and long routing sessions.

### Cutting diameter ranges

The cutting diameter tells you how wide the bit will actually cut. I’ve broken them into three everyday buckets that make sense whether you’re routing a tiny inlay or a wide dado.

1. **Mini (under 1/4‑inch)** – Perfect for delicate edge profiling, tiny dovetails, and fine in‑lay work. Think of those little decorative lines that add a touch of class.
2. **Mid‑size (1/4‑inch to 1/2‑inch)** – Your everyday workhorse. This range handles most rabbets, round‑overs, standard mortises, and flush‑trim tasks.
3. **Large (over 1/2‑inch)** – Used for big grooves, wide flush trims, heavy‑duty joinery, and when you need to remove a lot of material fast.

Each entry shows the exact diameter, the recommended shank size, and a short note on typical applications so you can match the bit to the job in a glance.

### Profile types

Shape matters just as much as size. The chart tags every diameter with its profile, letting you spot the right bit without scrolling through endless product pages.

- **Straight** – Simple [plunge cuts](https://www.amazon.com/s?k=plunge+cuts&tag=organizationtip101-20), dados, and mortises.
- **Round‑over** – Softens edges for furniture, giving that pleasant, comfortable feel.
- **Chamfer** – Creates angled edges, often at 45°, great for decorative breaks or easing sharp corners.
- **V‑groove** – Perfect for decorative lines, lettering, or adding a subtle texture.
- **Flush‑trim** – Matches a template or existing edge, ideal for laminate work or pattern routing.
- **Spiral up/down** – Delivers clean chips evacuation in both hardwood and softwood, reducing burn and heat.

Knowing the profile helps you pair the right size with the right shape, cutting down on trial and error.

## How to make the PDF work for you

1. **Download** – Hit the “Free PDF” button on the Router Bits Review page. The file is under 200 KB, so it loads instantly even on a sluggish connection.
2. **Print** – Standard letter paper works best. I like to fold the sheet in half and tuck it into my apron pocket or stick it to the side of my [router table](https://www.amazon.com/s?k=router+table&tag=organizationtip101-20) with a magnet.
3. **Mark** – Grab a dry‑erase marker and circle the bits you own. Seeing which sizes you already have makes it obvious what’s missing from your collection.
4. **Reference** – Keep the sheet handy on your bench. When a new project pops up, a quick glance tells you whether you’ve got the right bit or if it’s time to place an order.

## Practical tips for picking the right size

### Measure twice, cut once—even with bits

Before you reach for a bit, measure the groove or profile you actually need. A common slip‑up is assuming a “1/2‑inch round‑over” gives you a 1/2‑inch radius. In truth, the radius is half the cutting diameter, so a 1/2‑inch bit yields a 1/4‑inch radius. The chart includes a diameter‑to‑radius column so you can convert on the fly. For deeper insight on selecting the ideal profile, see our guide on how to **[choose the perfect router bit for precise edge cuts](/routerbitsreview/how-to-choose-the-perfect-router-bit-for-precise-edge-cuts-a-woodworkers-guide)**.

### Match the shank to your router

If you’re running a compact router with a 1/4‑inch collet, don’t try to force a 1/2‑inch shank in there. It’ll chew up the collet, create chatter, and leave a rough surface. The shank column on the chart eliminates that guesswork—just look up the bit and confirm it fits your machine.

### Think about the material

Hard maple, walnut, and cherry love a clean, low‑heat cut. When tackling **[hardwood projects](/routerbitsreview/the-complete-guide-to-choosing-the-right-router-bit-for-hardwood-projects)**, I usually reach for a spiral up‑cut bit; it pulls chips away from the cut, reducing friction and burn. Softer woods like pine or poplar tolerate [straight bits](https://www.amazon.com/s?k=straight+bits&tag=organizationtip101-20) just fine, and they’re easier on the wallet. The chart flags each size with a “hard/soft” suggestion so you can pick the right tool for the wood you’re working with.

## Keeping your bits in top shape

A size chart is only useful if the bits themselves are sharp and clean. Here’s my quick **[maintenance routine](/routerbitsreview/step-by-step-router-bit-maintenance-sharpen-clean-and-extend-tool-life)** that takes less than a minute after each session:

- **Clean** – Wipe away resin and dust with a rag or a [soft brush](https://www.amazon.com/s?k=soft+brush&tag=organizationtip101-20). A little bit of [mineral spirits](https://www.amazon.com/s?k=mineral+spirits&tag=organizationtip101-20) helps on stubborn buildup.
- **Inspect** – Run a fingernail lightly over the cutting edge. Any nicks or flat spots mean it’s time to sharpen or replace.
- **Sharpen or replace** – I keep a small diamond stone for minor touch‑ups, but most of the time I swap the bit for a fresh one. Knowing the exact size from the chart makes ordering a replacement painless.

## Where to find the bits you need

I’m not tied to any single brand, but here’s where I usually source my router bits:

- **Local woodworking stores** – Great for handling a bit before you buy, feeling [the balance](https://www.amazon.com/s?k=The+Balance&tag=organizationtip101-20), and asking questions.
- **Online specialty shops** – Often offer bulk packs that line up perfectly with the most common sizes on the chart.
- **Manufacturer’s direct sites** – They sometimes release new profiles first, so it’s worth checking if you’re after something niche.

When you’re looking at a product description, cross‑check it with the chart. If it says “1/2‑inch shank, 1‑inch cutting diameter,” you’ll know exactly where it belongs in your toolbox.

## A little story from my shop

Last summer I was building a set of [nesting tables](https://www.amazon.com/s?k=Nesting+Tables&tag=organizationtip101-20) for a client who wanted a subtle soft‑edge look. I grabbed what I thought was a 3/8‑inch round‑over bit, set the router, and cut the first leg. The edge came out looking more like a sharp bevel than a gentle curve. I pulled the bit, checked the chart, and realized I’d actually picked up a 3/8‑inch [straight bit](https://www.amazon.com/s?k=straight+bit&tag=organizationtip101-20) with a chamfer profile—same diameter, wrong shape. A quick glance at the PDF showed the correct 3/8‑inch round‑over with a 1/4‑inch radius. One more pass and the tables looked exactly as the client wanted. That moment reminded me why a clear size chart is worth its weight in oak.

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Keep this chart close, trust your measurements, and let the right bit do the [heavy lifting](https://www.amazon.com/s?k=heavy+lifting&tag=organizationtip101-20). With the right size at your fingertips, every joint, edge, and decorative groove will come out clean, fast, and—most importantly—right the first time.