How Many Square Feet Are in a Bundle of Shingles? (2026)

One bundle of shingles covers 33.3 square feet, and it takes 3 bundles to cover one roofing square (100 square feet). That is the standard answer for the asphalt shingles on most Illinois homes, and it is the number to use for quick estimates. The exception you must know about: some architectural and designer bundles cover only 25 square feet, so those take 4 bundles per square — always check the coverage printed on the bundle wrapper before you order, because guessing wrong leaves you short by a quarter of your material.

If you already know your roof area and want the bundle count straight away, our shingle bundle calculator does the division for you, including the waste allowance. The rest of this guide explains where the 33.3 number comes from, how it changes by shingle type, and how many individual shingles are actually inside a bundle.

Why 33.3 Square Feet: Bundles, Squares, and Exposure

Roofers measure roofs in squares: one square equals 100 square feet of roof surface. Manufacturers pack asphalt shingles so that three bundles cover exactly that square, which makes 100 divided by 3, or 33.3 square feet per bundle. That math only works because of exposure — the part of each shingle left visible after the next course overlaps it. A standard 3-tab shingle is 12 inches by 36 inches, but only about 5 inches of its height shows once installed, so the covered area per shingle is far smaller than the shingle itself.

The key point is that bundle coverage is a finished-roof number, not a raw-material number. The wrapper already accounts for overlap, so you do not need to adjust for it yourself. Multiply your roof area in square feet by 3 bundles per 100 square feet, and you have your base bundle count before waste. A 1,500-square-foot roof, for example, is 15 squares, which is 45 bundles before waste and about 50 bundles once you add a 10 percent cutting allowance.

Coverage by Shingle Type

Not every bundle covers 33.3 square feet. The table below covers the types you will actually encounter on a Lake County roof, with the counts that matter at order time:

Shingle type	Coverage per bundle	Bundles per square	Notes
3-tab asphalt	33.3 sq ft	3	The industry standard; the number most calculators assume
Architectural (dimensional) asphalt	33.3 sq ft (most brands)	3	Some brands pack 25 sq ft bundles — check the wrapper
Designer / luxury asphalt	25–33.3 sq ft	3–4	Varies most by brand and profile; wrapper rules
Hip and ridge cap shingles	Sold by linear foot, not area	n/a	Ordered by ridge and hip length, separate from field bundles

The architectural exception deserves emphasis because it is the most common ordering mistake. Most architectural shingles still pack at 33.3 square feet per bundle, but several popular lines pack at 25 square feet, which means 4 bundles per square. On a 20-square roof, that difference is 20 bundles — an entire pallet short if you assumed the standard. Our architectural shingles guide lists the profiles where this shows up most often. When in doubt, the wrapper wins: the coverage figure printed on it overrides any rule of thumb, including this guide.

How Many Shingles Are in One Bundle?

The number of individual shingles in a bundle varies by brand and shingle size, but typically falls between 15 and 29 shingles per bundle. Smaller, lighter 3-tab shingles sit at the higher end of that range, while thick architectural shingles — which are heavier and bulkier per piece — sit at the lower end. That is also why bundle weight varies so much: a bundle of 3-tab shingles typically weighs 60 to 80 pounds, while a bundle of architectural shingles can weigh 70 to 100 pounds.

For ordering, the piece count inside a bundle does not matter — coverage per bundle does. But it matters for handling: a crew moving architectural bundles up a ladder is moving heavier packs, and a homeowner carrying a spare bundle into the garage should expect real weight. If you are buying a few bundles for a repair, ask the supplier for the coverage figure and the piece count together, so the repair batch matches what is already on your roof.

Worked Example: From Roof Area to Bundle Count

Take a typical Waukegan ranch with 1,800 square feet of roof surface (not footprint — roof surface, measured along the slopes). Divide by 100 to get 18 squares. At the standard 3 bundles per square, that is 54 bundles before waste. Add 10 percent for a straightforward roof and you order 60 bundles; on a cut-up roof with dormers and valleys, use 15 percent and order 62 to 63 bundles, rounded up. If your shingles happen to be a 25-square-foot architectural line, the same roof needs 72 bundles before waste and about 79 to 80 with it — a difference worth catching before delivery day.

The waste allowance is not padding. Valleys, hips, dormer cheeks, and starter courses all consume shingles that never show as finished coverage, and running short mid-job costs a delivery fee and a schedule delay — which is why our shingle bundle calculator adds the waste allowance into its count automatically. Order the waste up front; an unopened spare bundle or two in the garage is also your future repair stock, matched in color and lot to the roof.

Footprint Versus Roof Area: The Mistake to Avoid

The most common bundle-count error is measuring the house footprint instead of the roof surface. A 1,000-square-foot footprint on a pitched roof is not a 1,000-square-foot roof — the slopes add area, and the steeper the pitch, the bigger the gap. On a typical 6/12 pitch, the roof surface runs about 12 percent larger than the footprint; on a steep 12/12 pitch, it runs about 41 percent larger. Measure the slopes, or use our roofing area and squares calculator to convert footprint and pitch into true roof area, then divide by 33.3 for bundles.

Once you have the bundle count for your roof size, the next question is usually the total for a specific house size — our guide to how many bundles of shingles for 1,000 square feet walks through that exact calculation, including the waste allowance.

Frequently Asked Questions

How many square feet are in a bundle of shingles?

One bundle of asphalt shingles covers 33.3 square feet, and 3 bundles cover one roofing square (100 square feet). That is the standard for 3-tab shingles and most architectural shingles. Some architectural and designer bundles cover only 25 square feet, taking 4 bundles per square, so always check the coverage printed on the bundle wrapper before ordering.

How many bundles of shingles are in a square?

There are 3 bundles in a roofing square for standard asphalt shingles, since one square equals 100 square feet and each bundle covers 33.3 square feet. For architectural or designer lines packed at 25 square feet per bundle, there are 4 bundles per square. The wrapper coverage figure is the final authority for the product you are buying.

How many shingles are in one bundle?

The number of shingles in one bundle varies by brand and shingle size, typically between 15 and 29 shingles per bundle. Smaller, lighter 3-tab shingles sit at the higher end of that range, while thicker architectural shingles sit at the lower end. Bundle weight varies the same way, typically 60 to 80 pounds for 3-tab and 70 to 100 pounds for architectural bundles.

Do all shingle bundles cover the same area?

No. Most 3-tab and architectural bundles cover 33.3 square feet, but some architectural and designer bundles cover only 25 square feet, and hip and ridge cap shingles are sold by linear foot rather than by area. Assuming 33.3 across the board can leave you a full pallet short on a large roof, so confirm the coverage figure on the wrapper for the exact product you are ordering.

How many bundles do I need for my roof?

Divide your roof surface area in square feet by 33.3 to get the base bundle count, then add 10 percent waste for a straightforward roof or 15 percent for a cut-up roof with dormers and valleys, and round up. For example, an 1,800-square-foot roof needs 54 bundles before waste and about 60 bundles with a 10 percent allowance. Measure roof surface, not house footprint, and adjust for pitch.