# How do you estimate a roof?

## How do you estimate a roof?

Multiply your house length by your house width to get the area. (For example, 40 feet x 30 feet = 1,200 square feet.) Next, multiply the area by your roof’s pitch. (1,200 x 1.05 = 1,260 square feet.)

How do I calculate the size of my roof?

### How do you calculate how many squares my house is?

Multiply the length by the width and write the total square footage of each room in the corresponding space on the home sketch. Example: If a bedroom is 12 feet by 20 feet, the total square footage is 240 square feet (12 x 20 = 240). Add the square footage of each room to determine your home’s total square footage.

How many square feet are in a bundle of shingles?

33 square feet
You usually purchase shingles by the bundle. Standard shingles are 12 by 36 inches and come 29 to a package. Most shingles come 3 bundles to a square — which is equal to 100 square feet. So, each bundle provides about 33 square feet of coverage.

## How do you calculate shingles on roof?

To estimate how many shingles you’ll need, first estimate the total square footage of your roof’s surface. To do this, measure the length and width of each plane on the roof, including dormers. Then, multiply length x width to get the square footage of each plane.

How many bundles of shingles do I need calculator?

For most shingle types, you’ll need 3 bundles to make a square of finished roof, which is 100 square feet. If you have a roof area of 3000 square feet, you’ll need 90 bundles of shingles. Shingles with 4 bundles per square will require you to purchase 120 bundles for a 300 square foot roof. How To Calculate Shingles

### How do you calculate roofing?

Roof Measurements Measure each plane of your roof by length and width. Divide this number by 100 to determine how many squares you have in your roof area. Add 10 percent for any overage that might be needed when installing the shingles. Divide the total number by 3, and you will know how many bundles you need to purchase for your roofing project.

How many shingles in one square for roofing?

Shingles are packaged in bundles that include a number of strips of roofing. Twenty-seven strips equal a bundle, generally speaking, and roughly three to four compose a square.