Generally there is 1/3 of 1 square per bundle but this varies with style and manufacturer. a square covers 100 square feet of roof so 1 bundle would be roughly 33 square feet.
70 pounds
26 shingles in a bundle of three tab asphalt shingles
Depends is the shingles are 3 bundle or 4 bundle to a Square (100 sq ft.) This information can be found on the shingle wrapper. To determine how many bundle of shingles you need measure the width and length of your roof to the nearest foot. Use this formula to determine area Length x width= area . For example: one side for your roof from peak to eve measures 17' and from rake to rake measures 50' . 17 x 50= 850 since there are two sides of a roof multiply by 2 = 1700 Sq. foot. Now divide by 100 since there are 100 sq foot in one Square. =17 square. Now multiply the number of Square by the number of bundles required to cover one Square 17 x 3 = 51 bundle of shingle. Other tips, one bundle of 3-tab shingles will cover about 25 lineal feet when used for cap.
21
A bundle of 3-tab shingles typically covers about 33.3 square feet. When calculating linear feet for capping, it depends on the length of the roof's edge. Generally, if you're using 3-tab shingles for capping, you would need to determine the total linear feet of the edge to be capped and divide by the coverage per bundle to find how many bundles are required.
Three bundles per square
A standard 3-tab shingle bundle typically contains about 33 square feet of coverage. To calculate the starter needed, you generally require one starter strip for every three bundles of shingles. Thus, you would typically use about 11 feet of starter per bundle, translating to approximately 33 feet of starter for a full bundle of 3-tab shingles.
Usually 4 that information should be on the bundle
About 80 lbs.
each bundle does 33.3 sq ft.
A bundle of shingles weigh ~ 80lbs, so it depends if you are using 3-tab or architectual shingles. There are usually 22 shingles in a bundle of arch. and 26 in a bundle of 3-tab. Doing the division and arch shingle weighs ~3.63 lbs and a 3-tab weighs ~3.08lbs. The weight will very depending on the brand and style of shingle as well... Hope that helps you...