Quick version: most modern architectural shingles come three bundles to a square, and a "square" is 100 square feet of roof. So if your roof is 20 squares, you're looking at roughly 60 bundles of field shingles before you add waste, starter strip, and ridge cap.
That's the short answer. But if you're trying to sanity-check a quote or figure out how much material your roof really needs, there's a little more worth knowing. I'll walk you through it the same way I'd explain it standing in your driveway.
What is a "square" in roofing?
Quick Answer: A square is 100 square feet of roof area. It's the unit roofers and suppliers use to measure and price a roof, instead of counting individual shingles.
Roofers don't talk in square feet, and we almost never talk in individual shingles. We talk in squares. One square covers 100 square feet: think of a 10 foot by 10 foot area. When I give you a price or a material list, it's built around how many squares of roof you have.
The reason is simple. Shingles are sold and installed in bundles, and bundles are sized to fit neatly into squares. Once you know your roof is, say, 25 squares, that'll give you your total number to figure everything else out.
How many bundles of shingles are in a square?
Quick Answer: Three bundles per square for most architectural and 3-tab shingles. Heavier premium or designer shingles can run four or even five bundles to a square.
For the shingles most homes in Northern Indiana and Southern Michigan use, the answer is three bundles per square. That covers architectural shingles (also called dimensional or laminate shingles, the thicker, layered kind that's standard today) and the older, flatter 3-tab style.
Where it changes is at the top end. Premium designer shingles, the heavy luxury lines built to mimic slate or wood shake, are thicker and weigh more, so they're packaged with less coverage per bundle. Those often come four or five bundles per square. If a quote you're holding lists more bundles than you expected, that's usually why. It's the shingle line, not a mistake.
“Always check the shingle line named on your quote before you compare bundle counts between contractors. Comparing a three-bundle architectural shingle to a five-bundle designer shingle and calling one ‘cheaper’ isn't a fair fight. You're comparing two different products. Match the shingle first, then compare the price.”
How many shingles are in a bundle?
Quick Answer: Usually somewhere between 20 and 26 shingles, depending on the brand and the exact product line.
There's no single number that's true for every shingle, and that trips people up. The shingle count per bundle depends on the size of the shingle and how the manufacturer packages it. For most architectural shingles you'll find roughly 20 to 26 shingles in a bundle. One bundle covers about 33 square feet, which is a third of a square. Three of them make your 100. As an example, Owens Corning lists its TruDefinition Duration architectural shingles at 32.8 square feet of coverage per bundle, three bundles to the square.
How much does a bundle of shingles weigh?
Quick Answer: A bundle of architectural shingles typically weighs 65 to 80 pounds. Older 3-tab bundles are lighter, around 50 to 65 pounds.
This matters more than people think. A single square of architectural shingles weighs somewhere in the range of 200 to 240 pounds, and a full roof adds up fast. On a 25 square roof that's well over two tons of material going up a ladder and onto your deck, or boomed and evenly distributed across the roof.
It's one reason a proper crew and the right equipment matter. Carrying seventy-pound bundles up a ladder all day, in the July heat, is real work. It's also why we care about the condition of your roof deck (the wood layer under the shingles). It has to carry that load for decades.
“If you're storing bundles on the roof before install, spread them out across the ridge and potentially in the field if needed, never stacking them all in one spot. Piling two tons of shingles on one section of decking is asking for roof decking damage, possibly even structural. Spreading the weight is one of those small habits that separates a careful crew from a careless one.”
How to figure out how many squares your roof is
Quick Summary: Measure the roof's square footage (length times width), divide by 100 to get your squares, then multiply by three for a rough bundle count. Add 10 to 15 percent for waste.
Here's the plain math, step by step:
- Measure your roof area in square feet. This is the actual surface of the roof, not the footprint of your house. A steep or complex roof has more surface than the ground it covers.
- Divide by 100. That gives you your number of squares. A 2,000 square foot roof is 20 squares.
- Multiply squares by three. Twenty squares times three bundles is 60 bundles of field shingles.
- Add a waste factor. For a simple gable roof (two straight slopes meeting at a ridge), add about 10 percent. For a cut-up roof with lots of hips, valleys, and dormers, add 15 percent or more, because every angle means shingles get cut and trimmed, and the offcuts get thrown away.
So that 20 square roof lands at roughly 66 to 69 bundles once you allow for waste. Round up. Running short mid-job is worse than having a bundle left over.
“Don't measure your own roof off the ground and treat it as being the precise number. Ground guesses miss the pitch, the overhangs, and the cut-up sections almost every time. I always measure the actual planes of the roof, and these days a lot of that starts with satellite measurements that are guaranteed to be accurate within one square.”
This article is part of our full guide to choosing roof shingles. Keep reading:
Don't forget starter strip and ridge cap
Quick Summary: Your field-shingle bundle count doesn't include the starter strip along the eaves or the ridge cap along the peaks. Those are separate materials, and leaving them out is a common way a quote comes up short.
Two pieces of the roof get counted separately from the field shingles (the main shingles covering the open area):
- Starter strip runs along the bottom edges of the roof. It seals down that first course and stops wind from getting under your shingles. It comes in its own bundles.
- Ridge cap runs along the peaks and hips. It's either purpose-made cap shingles or 3-tab shingles cut down for the job.
When you're reading a quote, these should be listed or clearly included. If a bid only accounts for field shingles and says nothing about starter and cap, that's a fair question to ask. It's not a small amount of material on a cut-up roof.
Why this math matters when you're reading a roofing quote
Quick Summary: Knowing your rough bundle count lets you sanity-check a bid and spot a contractor who's either guessing or cutting corners on material.
You're almost certainly not going to shingle your own roof, and I'm not suggesting you should. So why does any of this matter?
Because it's your best gut-check on a quote. If you know your roof is around 20 squares and a bid is built on materials for 14, something's off. Maybe they measured wrong. Maybe they're planning to stretch the material and skip the waste allowance, which is how you end up with a roof that runs short and gets patched together at the end. Either way, you want to know before you sign.
A quote built on honest measurements will show you the squares and the material clearly. That transparency is the whole point. You shouldn't have to take a roofing number on faith. And if you want to see what those squares translate to in dollars, here's our honest guide to roof replacement costs in Indiana.
"Perfect. Used drop cloths and what did get dropped got picked up. Even left a complimentary bundle of shingles. Great work."
Brad, Better Way Roofing customer, Shipshewana, Indiana
That leftover bundle Brad mentions isn't an accident, by the way. When we order with a proper waste allowance, there's often a bundle or part of one left at the end.
“I like to leave a spare bundle in your garage when the job's done, as long as it matches. Shingles change color slightly from production run to production run over the years. If a branch comes down in five years and knocks a few shingles loose, having a bundle from your exact roof means the repair blends in instead of standing out.”
"Highly recommend to anyone looking for quality work and a good price. Great price compared to other quotes received, and to top it off they did a fantastic job for a cheaper price. Lyle and Larry kept us in the loop on the crew's schedule."
Mechelle Hamel, Better Way Roofing customer
Frequently asked questions
How many bundles of shingles do I need for a 2,000 square foot roof?
Roughly 66 to 69 bundles. A 2,000 square foot roof is 20 squares, which needs 60 bundles of field shingles at three per square, plus about 10 to 15 percent extra for waste. Starter strip and ridge cap are on top of that.
Is a bundle of shingles a third of a square?
Yes, for the standard three-bundle shingles. Each bundle covers about 33 square feet, and three bundles make one 100 square foot square. Heavier designer shingles that come four or five bundles per square cover less per bundle.
How much does a square of shingles weigh?
A square of architectural shingles weighs roughly 200 to 240 pounds. That's three bundles at about 65 to 80 pounds each. 3-tab shingles weigh a little less.
Can I just count bundles to compare two roofing quotes?
Only if both quotes use the same shingle line. A three-bundle architectural shingle and a five-bundle designer shingle aren't the same product, so their bundle counts aren't comparable. Match the shingle first, then compare price.
Do I need to add extra for a steep or complex roof?
Yes. A simple gable roof needs about 10 percent waste. A roof with lots of hips, valleys, and dormers needs 15 percent or more, because more cuts mean more offcuts thrown away.
Not sure how many squares your roof really is? Let's measure it for free.
Guessing bundle counts off the ground is how homeowners end up surprised. We'll measure your actual roof, walk you through the squares and the material line by line, and give you a written quote you can actually check. No pressure, no vague numbers.
Book your free roof measurement and honest quote with Better Way Roofing: call (574) 370-8342 today. We serve Shipshewana and all of Northern Indiana and Southern Michigan.