A bundle holds 26 standard 3-tab shingles, or around 21 architectural shingles. Architectural bundles hold fewer because each shingle is thicker, and a bundle still has to be liftable.
The piece count is rarely the number you actually need. Shingles are sold and installed by coverage, at roughly 33 square feet per bundle and 3 bundles to a square.
Why the count changes between shingle types
A standard 3-tab shingle is a flat strip, usually 12 by 36 inches, and 26 of them fit in a bundle a roofer can carry up a ladder. Architectural shingles, sometimes called dimensional or laminated, are built from two layers bonded together. That extra material is what gives them their depth and their longer warranties, and it also means fewer fit in a bundle of the same weight.
Designer and premium lines go further still. Some are heavy enough that a square takes four or even five bundles instead of three, and the per-bundle count drops to match. If you are buying anything above a standard architectural shingle, read the wrapper before you work out quantities.
The numbers side by side
| Shingle type | Per bundle | Bundles per square | Per square |
|---|---|---|---|
| 3-tab | 26 shingles | 3 | 78 shingles |
| Architectural | About 21 | 3 | About 63 |
| Designer / premium | Varies | 4 to 5 | Check the wrapper |
Those piece counts are the common ones, not a standard anyone is held to. Manufacturers change bundle counts between product lines, so the number on the bundle in front of you beats any table, including this one.
Order by coverage, not by piece count
Roofers talk in squares. One square is 100 square feet of finished roof, three bundles make a square, and each bundle therefore covers about 33 square feet. That relationship holds across 3-tab and architectural shingles even though the piece counts differ, which is exactly why it is the useful number.
Counting individual shingles only helps in one situation: patching. If you are replacing a handful of blown-off shingles rather than a roof, knowing a bundle holds 26 tells you whether you need one bundle or three. For anything larger, work in squares.
Getting from your roof to a bundle count
Measure the roof, not the house. A pitched roof holds more surface area than the ground it covers, and the steeper it is, the wider that gap gets. Multiply your footprint by the slope factor for your pitch before you divide by 100.
bundles = (footprint × slope factor) ÷ 100 × 3 × (1 + waste)
Waste runs about 10% on a simple gable, 15% on a hip roof, and 20% or more once valleys and dormers force angled cuts. Round up to whole bundles, and buy the extra from the same production run while you are there, since color varies slightly between batches.
Put your own dimensions through the Roofing Shingles Calculator to get squares and bundles directly, or the Roof Pitch Calculator first if you do not know your slope factor. There is also more detail on how many bundles make a square.
Skip the arithmetic
Enter your own dimensions and get the exact figure instead of working from averages.
Open the Roofing Shingles CalculatorFrequently asked questions
26 for standard 3-tab shingles, and around 21 for most architectural shingles. Architectural bundles hold fewer pieces because each shingle is thicker and heavier, so a bundle someone can still lift holds less of them. Counts move around by manufacturer, so check the wrapper before you order.
78 for 3-tab, at 26 shingles across 3 bundles. Architectural works out closer to 63, at roughly 21 per bundle. Both cover the same 100 square feet of roof, so you order by coverage and the piece count barely comes into it.
Usually between 60 and 80 pounds. Architectural bundles sit at the heavy end because the shingles are thicker. A 20-square roof works out to around 60 bundles, somewhere near two tons of material that has to get up a ladder and that the deck underneath has to carry.
Take your roof's actual surface area, not the building footprint, divide by 100 to get squares, then multiply by 3. Add 10% waste on a simple gable and up to 20% on a roof with valleys or dormers. The Roofing Shingles Calculator does all of that from your dimensions and pitch.
More guides
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