Roofing projects can seem like a complex puzzle, especially if you’re not familiar with the terminology and measurements used in the industry.

When planning your roofing project, you may have come across the term “square” as a unit of measurement for shingles.

But what exactly does it mean, and how can you determine how many bundles of shingles equal 1 square? Let’s break it down in simple terms.

Understanding the Basics

Before we delve into the math, it’s essential to understand some fundamental concepts:

1. What Is a Square of Shingles?

In roofing lingo, a “square” is a unit of measurement used to quantify roofing materials. One square is equal to 100 square feet. It’s a convenient way for roofing professionals to estimate and order the right amount of materials for a project.

2. What Are Shingle Bundles?

Shingles are typically packaged in bundles. The number of shingles in a bundle can vary depending on the type and brand of shingles. Commonly, there are three bundles of shingles per square, but this can differ.

Calculating the Number of Bundles in 1 Square

Now, let’s calculate how many bundles of shingles you need for 1 square.

Step 1: Determine Shingle Coverage

First, you need to know the coverage area of a single bundle of shingles. This information is usually provided by the manufacturer. Let’s say one bundle covers 33.3 square feet.

Step 2: Calculate Shingles Needed for 1 Square

To find out how many bundles are needed for 1 square (100 square feet), divide the square footage by the coverage area of one bundle:

100 square feet ÷ 33.3 square feet/bundle ≈ 3 bundles

So, you would typically need approximately 3 bundles of shingles to cover 1 square.

Considerations and Variations

Keep in mind that the number of bundles per square can vary based on factors like shingle type, brand, and region. Always check the manufacturer’s recommendations for the specific shingles you plan to use. Additionally, consider buying a little extra to account for any mistakes or future repairs.


In the world of roofing, understanding how many bundles of shingles equal 1 square is a straightforward yet crucial calculation.

It ensures that you purchase the right quantity of materials for your project, preventing delays and unnecessary expenses.


As a civil engineer and roofer, I love to share the experience that I have gained through the last couple of years. In the roofing industry, practical experience is a very crucial fact that can help you a lot. Hence, I want to help you with my blog.

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