Corner Bead Guide: Calculating Linear Footage and Stick Count

Introduction

Corner bead protects and straightens outside (convex) drywall corners — the edges that stick out into a room, like the corner of a hallway or the edge of a doorway opening. Unlike inside corners, which are simply taped, outside corners need a rigid metal or vinyl bead fastened over the joint before mudding. This guide covers how to calculate exactly how much you need.

For a complete suite of drywall estimating tools, visit the drywall calculators hub .

Corner Bead vs. Tape

Any outside (convex) drywall corner needs bead for both durability and a straight finished edge — inside corners do not need bead; they are taped instead.

Calculating Linear Footage

Multiply your outside corner count by the corner height (typically the floor-to-ceiling wall height) to get total linear footage of bead needed.

Formula:

Linear footage = Number of outside corners × Corner height

Example:
4 outside corners, 8 ft corner height.

4 × 8 = 32 linear ft

For help with this calculation, use the Corner Bead Calculator .

Converting to Sticks

Add a waste allowance for trim cuts and mistakes — 10% is a reasonable default — then divide the total by the stick length your supplier sells, most commonly 8 ft or 10 ft.

Formula:

With waste = Linear footage × (1 + Waste factor)
Sticks needed = With waste ÷ Stick length (round up)

Example:
4 outside corners, 8 ft corner height, 10 ft stick length, 10% waste factor.

Linear footage: 4 × 8 = 32 ft
With waste: 32 × 1.10 = 35.2 ft
Sticks: 35.2 ÷ 10 = 3.52 → round up to 4 sticks

Common Mistakes to Avoid

• Applying corner bead to inside corners, which should be taped instead

• Not adding a waste allowance for trim cuts at floor and ceiling

• Rounding down on stick count instead of up, since bead isn’t typically spliced mid-corner

• Using the wrong corner height when a room has varying ceiling heights or sloped ceilings

Important Limitations

Estimates Are Not Construction Specifications

Corner bead type and installation must comply with project specifications and local requirements.

Frequently Asked Questions

What is the difference between corner bead and drywall tape?
Corner bead is a rigid metal or vinyl strip used on outside (convex) corners to create a straight, durable edge. Paper or mesh tape is used on inside (concave) corners and flat seams, where no rigid support is needed.

What length does corner bead come in?
Corner bead is most commonly sold in 8 ft and 10 ft lengths, matching standard wall heights.

Do I need corner bead on every outside corner?
Yes — any outside (convex) drywall corner needs bead for both durability and a straight finished edge. Inside corners do not need bead; they are taped instead.

Ready to calculate your corner bead? Use the free Corner Bead Calculator .

Explore More Drywall Resources

This guide covered the basics of corner bead estimation. For a complete suite of estimating tools, visit our drywall calculators hub — where you’ll find dedicated calculators for sheets, screws, mud, tape, corner bead, metal stud framing, fire-rated assemblies, and texture coverage. Each calculator is paired with a full guide walking you through the math, common mistakes, and project-specific considerations.