Length x Width
99.7
If you mean square feet, there are 100 square feet in a square. So 20 squares is 2000 square feet.
384 square feet - without using a calculator !
The roofing industry speaks of a "square" as meaning 100 square feet. So, if your contractor says your roof is about 9 squares, he means it will require about 900 square feet of materials in order to cover the surface area of your roof.
A roofing square is 100 square feet of materials.
To find the area of a roof in square yards, first measure how long it is and how wide it is in feet. Multiply the two numbers together to get the area in square feet. Since there are 9 square feet in a square yard, divide the number by 9 and you will have the area of the roof in square yards. If the house is L shaped, measure the different sections separately and then add the square yards together.
2583
Multiply the two dimensions to get the area. The calculation will give you 1,008 square feet.
26 square feet? That is not a roof that is a patch. 5' X5' is 25 square feet, so a minimun job call for a roofer, about $100
96 square feet. Multiply length by width - the result is the area in square feet.
To determine how many rolls of underlayment are needed for a 1500 square foot roof, you first need to find out how much area one roll covers. If a roll has 144 feet, and assuming it covers 3 feet wide (a common width for underlayment), it would cover 432 square feet (144 feet x 3 feet). Dividing the total roof area (1500 square feet) by the coverage per roll (432 square feet) gives approximately 3.47. Therefore, you would need 4 rolls of underlayment to cover the roof.
375 sq ft