Calculate corner bead pieces for drywall outside corners. Enter total linear feet of outside corners and piece length to determine the number of corner bead strips needed.
Corner bead is a protective strip installed on all outside (external) drywall corners to create a straight, durable edge that resists denting and chipping. Without corner bead, outside corners would be fragile, uneven, and prone to damage from everyday contact. Every outside corner in your project — wall-to-wall corners, window reveals, soffits, and columns — needs corner bead.
This corner bead calculator determines how many pieces you need based on the total linear feet of outside corners in your project. Standard corner bead comes in 8-foot and 10-foot lengths. The calculator divides your total footage by the piece length and rounds up, accounting for waste from cuts and joints.
Corner bead is available in metal (galvanized steel), vinyl, and paper-faced varieties, each with different installation methods but the same length dimensions.
This data-driven approach helps contractors minimize rework, avoid delays caused by material shortages, and deliver projects on time and within the agreed budget.
Outside corners need specific material quantities. Missing even one corner bead means an unfinished edge that's vulnerable to damage. This calculator ensures every outside corner in your project is accounted for, with proper waste allowance for cutoffs. Regular use of this calculation supports compliance with building codes and inspection requirements, helping projects proceed smoothly through the permitting and approval process.
Pieces = ⌈(Total Outside Corner LF × (1 + Waste%)) ÷ Piece Length⌉
Result: 9 pieces
64 LF of outside corners with 10% waste = 70.4 LF. At 8 ft per piece: 70.4 ÷ 8 = 8.8 → 9 pieces of 8-foot corner bead.
Every outside corner requires corner bead: wall-to-wall outside corners, window and door reveals, soffits, bulkheads, columns, and niches. Count every location carefully. A typical room might have 2–4 outside corners, while a complex layout could have 10+.
Metal corner bead (galvanized steel) is the industry standard. It's rigid, creates a sharp edge, and is inexpensive. Install with crimper or screws. Vinyl corner bead is more flexible, resists impact better, and won't corrode. Paper-faced corner bead is embedded in compound like tape and produces the smoothest finish.
Plumb the corner bead carefully before fastening — it defines the straightness of the corner. Use a level along the installed bead. Attach securely every 9–12 inches. For metal bead, use a clinch-on tool or drywall screws (not nails, which can loosen over time).
Apply the first coat of compound to fill the flanges flush. Let dry. Apply a second coat feathered 6–8 inches out from the corner on each side. Finish with a third coat feathered to 10–12 inches if needed. Sand lightly between coats.
Standard corner bead is sold in 8-foot and 10-foot lengths. Most are 8 ft to match standard wall height. For taller walls, splice two pieces with a minimal gap and cover the splice with joint compound.
Metal is strongest and most common. Vinyl resists denting and rust. Paper-faced is easiest to finish smooth. For most residential projects, any type works well. Paper-faced bead is increasingly popular among professionals.
Metal bead: attach with drywall screws every 9–12 inches or use a corner bead crimper. Vinyl bead: attach with spray adhesive and staples. Paper-faced: embed in joint compound like tape.
No. Inside (internal) corners use paper tape folded along the center crease. Corner bead is only for outside (external) corners where two walls or surfaces meet at a protruding angle.
Bullnose corner bead creates a rounded edge instead of a sharp 90-degree corner. It comes in the same lengths as standard bead and is measured and ordered the same way. It's an aesthetic choice.
Apply 2–3 coats of joint compound over corner bead, each coat feathered wider than the last. The bead protects the edge; the compound fills the flanges and creates a smooth transition to the flat wall surface.
Yes. Position two pieces end-to-end with a tiny gap (1/16"). The splice will be invisible after mudding. Avoid overlapping pieces as this creates a visible bump.
Minor dents can be filled with multiple thin coats of joint compound. Severe dents require removing the damaged section, cutting a new piece to fit, and re-installing. The repair is mudded and sanded to blend.