Corner Bead Calculator

Calculate how many pieces of corner bead you need for the outside corners of a drywall job.

Corner Bead
— pieces
Rounded up.

Usage Tip

Metal bead is the most durable; paper-faced bead is easier to set straight and resists cracking.

THE MATH
pieces = round up( corners × (1 + waste ÷ 100) )
Corner bead protects the outside corners of drywall. You need one piece per corner, cut to the wall height, plus a little extra for damage and miscuts.
Enter the number of outside corners, the wall height, and a waste percentage.
Buy bead at least as long as the wall height so each corner is one continuous piece.
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The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.