Why does the count follow corners rather than wall area?

Because a bead is not a covering, it is an EDGE. It exists to give a plaster arris something straight and hard to run against, so it is bought by the running metre of external corner and by nothing else — a room twice the size with the same number of corners needs the same quantity. What changes the number is the shape of the plan rather than its area: every return, reveal, bulkhead and column adds two or three corners each, so a straightforward large room can use less bead than a small one full of features. It is also why the count is one of the few take-offs where reading the plan beats measuring the room, and why the usual under-order is a plan whose reveals were never counted.

Metal, vinyl or paper-faced bead — does the choice change the quantity?

The linear quantity is the same, but waste and fixing method differ. Rigid metal bead comes in fixed sticks and every corner shorter than a stick wastes the offcut, which this estimate's per-corner rounding reflects; vinyl can be more forgiving on slightly out-of-square corners; paper-faced bead is bedded in compound rather than nailed, so it adds joint compound usage instead of fasteners. Archways need flexible arch bead, which is bought separately from straight stock.

What counts as an outside corner for corner bead?

Corner bead is applied to outside (convex) corners — where two wall or ceiling planes meet and project outward — such as the corners of columns, wall ends, and openings. Inside corners are typically finished with paper tape instead.

Why add a waste allowance to the total corner length?

Corner bead is cut to length at each individual corner run, so the offcuts left over at the top or bottom of each piece add up across a project — the waste allowance accounts for that material loss.

Does this total include inside corners or flat joints?

No — this calculates only the outside corner bead length you enter. Inside corners and flat field joints are a separate tape-and-compound quantity, not corner bead.

Materials & Quantities

Drywall Corner Bead Linear Footage Calculator

Calculate total corner bead needed for a project's outside drywall corners, with waste allowance.

Drywall is plasterboard in the UK and Australia.

Answers as you typeNo submit button
Every formula citedNamed published standards
Calculated in your browserNo account, nothing uploaded

SettingsSettings for this calculationUS

Market

Imperial · sales tax

Who is doing the work?

Waste is set to 5% by hand. Pick a tier above to replace it, or keep your own figure.

Total Outside Corner Length

The combined length of every outside corner that needs corner bead.

Add up the length of each outside (convex) corner in the project — vertical corners between intersecting walls, and any header or sill returns at openings that form an outside corner.

Waste Allowance (%)

Extra material to allow for cut waste at each corner.

Corner bead is cut to length (and sometimes mitered) at each corner run, which generates offcuts — 5% is a typical starting allowance for straightforward corners.

Corner bead needed

86.1 ft

High confidence

Then change the inputs to see how far the answer moves.

Show calculation logic

How this was calculated

Formula source(s)

Total corner bead = total outside corner length × (1 + waste allowance), accounting for offcuts at each corner

Inputs used

Total Outside Corner Length: 82 ft
Waste Allowance (%): 5

Final result86.1 ft

What this calculation does not cover

Not every external corner takes 90-degree bead. Splayed corners at bays and canted walls need off-angle or adjustable bead, bullnose corners need their own profile plus a transition cap at the head and foot of each run, and neither comes off the same shelf as straight stock — yet the running metre counts them all at the same rate and the same price.
Bead is chosen for its exposure as much as its shape, and a length gives no hint of it. Steel bead in a bathroom, a porch soffit or an unheated garage corrodes behind the paint and bleeds rust lines through the finish inside a couple of seasons. Those locations take vinyl, zinc or paper-faced bead — identical running length, different product and different money.

Estimated cost — your price

Price per ft ($)

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.

Schematic, drawn to the proportions you entered — not to scale on screen.

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

Total corner bead = total outside corner length × (1 + waste allowance), accounting for offcuts at each corner

Cite this page

Your workspace

Most jobs need more than one number. Add the calculators you need next and they open right here, underneath this one — your figures stay on screen and nothing is lost to a page change.

Tools and safety for this job

To hang plasterboard and cut board around openings and boxes. Generic types, no brands, no prices.

Protection this work requires

Joint-compound dust is very fine and travels: a P1/FFP1 mask is the minimum, and a damp-sponge finish avoids most of it.
Boards, blocks and bagged material cause most lasting back injuries on small sites: two people or a lifter for full sheets, and never a bag on one shoulder up a ladder.
Knives cause more site injuries than any power tool: cut away from your body, change blades often, and wear cut-resistant gloves to EN 388 level C for repeated cutting.

Show the 9 tools this job needs

Essential

Cordless drill/driver
Drywall saw
Tape measure
Utility knife

Recommended

Board lifter
Combination or framing square
Drywall screw gun

Optional

Oscillating multi-tool
Panel lift

Also needed as materials: drill and driver bits, oscillating blades, replacement blades.

what each drywall tool is for, and the spec that decides which to buy where one does.

Now that you have the number

These guides cover the work this quantity is for — the first ones run this calculator inside the section that raises the question.

Taping and Finishing to a Leveluses this calculator
Levels 0 through 5 are a ladder of coats and scrutiny: what each rung costs, what light exposes, and where a specification should stop.
Building a Curved Drywall Wall
Building a Rated Shaftwall

Called something else where you work? Plasterboard / drywall — the term in each market, how close the equivalence really is, and the standard that governs it.

Worked example: Basement room drywall — step 6 of 10

The data behind it: Production rates by operation

How to calculate drywall corner bead linear footage in 3 steps

Total Outside Corner LengthThe combined length of every outside corner that needs corner bead.
Waste Allowance (%)Extra material to allow for cut waste at each corner.
Corner bead neededThe tool computes the corner bead needed from those figures and shows the formula, its sources, and a confidence rating alongside it.

Corner bead needed by total outside corner length

Page defaults, not your figures above.

Total Outside Corner Length	Corner bead needed (ft)
40 ft	42
60 ft	63
80 ft	84
100 ft	105
120 ft	126
140 ft	147
160 ft	168

Frequently asked questions

Why does the count follow corners rather than wall area?: Because a bead is not a covering, it is an EDGE. It exists to give a plaster arris something straight and hard to run against, so it is bought by the running metre of external corner and by nothing else — a room twice the size with the same number of corners needs the same quantity. What changes the number is the shape of the plan rather than its area: every return, reveal, bulkhead and column adds two or three corners each, so a straightforward large room can use less bead than a small one full of features. It is also why the count is one of the few take-offs where reading the plan beats measuring the room, and why the usual under-order is a plan whose reveals were never counted.
Metal, vinyl or paper-faced bead — does the choice change the quantity?: The linear quantity is the same, but waste and fixing method differ. Rigid metal bead comes in fixed sticks and every corner shorter than a stick wastes the offcut, which this estimate's per-corner rounding reflects; vinyl can be more forgiving on slightly out-of-square corners; paper-faced bead is bedded in compound rather than nailed, so it adds joint compound usage instead of fasteners. Archways need flexible arch bead, which is bought separately from straight stock.
What counts as an outside corner for corner bead?: Corner bead is applied to outside (convex) corners — where two wall or ceiling planes meet and project outward — such as the corners of columns, wall ends, and openings. Inside corners are typically finished with paper tape instead.
Why add a waste allowance to the total corner length?: Corner bead is cut to length at each individual corner run, so the offcuts left over at the top or bottom of each piece add up across a project — the waste allowance accounts for that material loss.
Does this total include inside corners or flat joints?: No — this calculates only the outside corner bead length you enter. Inside corners and flat field joints are a separate tape-and-compound quantity, not corner bead.

Preliminary estimate, not certified engineering. This tool produces an indicative quantity calculation for planning purposes only — it is not a certified structural analysis, a guaranteed material takeoff, or a substitute for building department approval. Always verify measurements on-site and have a licensed contractor or structural engineer review any load-bearing, code-sensitive, or safety-critical work before purchasing materials or starting construction. Spotted an arithmetic or standards error? Report it to contact@craftquantities.com with your inputs — a confirmed fix gets a permanent check of its own, so the same mistake cannot come back.