Anchor & Hole Size Calculator

Take the guesswork out of drilling. Use this tool to find the correct drill bit diameter and hole depth for your anchor. Wondering what size drill bit for a wall plug or screw? Just select your material, anchor type, and screw size below to get an instant recommendation from our drill bit size for screw chart.

Get the Gear You Need

Having a variety of anchors and a sharp set of drill bits is essential for any project. (As an Amazon Associate, we earn from qualifying purchases.)

Disclaimer: This tool provides standard recommendations. Always check the packaging of your specific anchors for the manufacturer’s required drill bit size, as it can vary. For concrete, drill the hole 1/4″ to 1/2″ deeper than the anchor’s length to allow room for dust.