SettingsSettings for this calculationUS
The radius of the curved wall the bullnose corner follows.
Measure from the center of curvature to the face of the curved wall.
The total angle the curve sweeps through, in degrees.
A quarter-circle turn is 90°, a half-circle is 180°, and a full circle is 360°.
The longest length a single rigid bullnose bead segment can span while still following the curve.
Rigid bullnose bead can only bend so far before it kinks or cracks the paper facing — check the manufacturer's minimum bend radius or maximum chord length for your specific bead product.
Bullnose segments needed
8 segments
The maximum practical segment length depends on your specific bullnose bead product's flexibility — confirm the manufacturer's rated bend radius or chord length before finalizing this count.
- Total arc length
- 15.71 ft
They open the calculator with your figures already in it
Curved Wall Bullnose Corner Bead Segment Calculator: 8 segments — shown in imperial, US market. The link sets both, so the result they see is the one on your screen.
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How this was calculated
Formula source(s)
- Arc length = radius × angle (in radians); segments needed = ceil(arc length ÷ maximum practical segment length for a rigid bullnose bead)
Inputs used
- Wall Curve Radius
- 10 ft
- Total Curve Angle (degrees)
- 90
- Maximum Segment Length
- 2 ft
Intermediate steps
- Total arc length
- 15.71 ft
Confidence note: The maximum practical segment length depends on your specific bullnose bead product's flexibility — confirm the manufacturer's rated bend radius or chord length before finalizing this count.
What this calculation does not cover
- Counts pieces, not the bead you buy. Bullnose bead comes in fixed stock lengths, so short segments have to be cut out of long sticks, and how many sticks that takes depends on how the cut list nests and how much of each stick ends as offcut — not on the number of pieces. Order against arc length and stock length together.
- Assumes one run of bead following one arc. A curved bulkhead beaded top and bottom, an archway beaded on both faces of the opening, or a wall that curves and then returns needs this count again for each separate run — and the returns are where the segments are shortest and the waste per piece is highest.
- The joints are what shows. Chorded segments leave a small flat and a butt joint at every break — one fewer than the count above — and those joints telegraph under raking light once the wall is painted, however carefully they are filled. Shorter segments give a truer curve and more joints; longer ones give fewer joints and visible flats between them. Nothing here weighs that trade for you.
Estimated cost — your price
This site holds no price list for this material — local prices vary too much to publish honestly. Enter your supplier's price and the result is costed with it.
Computed in your browser — nothing you enter is uploaded. Presented in US customary units and US trade terminology. Where a formula follows a published standard, that standard and its edition are cited beside it on this page; where none governs, the page says so. Local amendments override model codes — verify against the code in force where you build.
Sources checked 2026-09-06 · in the site-wide review of 2026-09-06 · v1.0.1
Regulatory standards & verification citations1
- Arc length = radius × angle (in radians); segments needed = ceil(arc length ÷ maximum practical segment length for a rigid bullnose bead)
Cite this page
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