ROOFING TILE CALCULATOR
| Areas | Measurements |
|---|---|
| Nominal Roof Size (in sq. ft.) | |
| Roof Pitch |
Actual Square feet of House:sq. ft.
Numbers of Squares Need:
TIPS ON MEASURING FOR ROOFING
To accurately calculate the total area of your roof, you must first determine its slope, or pitch, along with the overall area the roof covers, referred to as the ”nominal area” in our calculator. These two factors are used together to give you the number of squares for your roof.
FINDING THE ROOF`S PITCH
You need to choose from the drop down menu the roof's pitch. To calculate this, you need to compare the roof's rise to its run. For example, a 6 in 12 roof pitch means that for every 6 inches the roof rises, it runs horizontally 12 inches. A 45-degree angled roof has a pitch of 12 in 12.
Choose one of the following three methods to measure your roof's pitch. For this task, you need a level and a ruler or tape measure. On the level, mark or indicate the 12” spot. This is where you'll be measuring the distance for the rise.
Method #1 - Place a ladder alongside your home, so you can reach the roof. Take your level and place it about a foot up from the roof's edge. Holding it level, measure the distance down to the roof from the 12” mark on your level. This distance is your rise. If this distance is 8 inches, for example, then your roof's pitch is 8 in 12.
Method #2 - At the gable end of your home, stand on a ladder so you can reach the rake rafter on your roof overhang. Place your level against the rake rafter, so that the 12” mark is on the bottom edge. After ensuring that the level is level, use your ruler to measure up from the level to the bottom edge of the rafter. This measure will give you the roof's rise. If the measurement is 6”, then the pitch of your roof is 6 in 12.
Method #3 - In your attic, place your level's 12” mark against the bottom of the roof's rafter. After checking that your level is perfectly horizontal, measure from the end of your level to the bottom edge of the rafter. This measure will give you the roof's rise.
FINDING THE ROOF`S AREA
If your roof is either flat or has a pitch of no more than 3 in 12, finding the nominal area is calculated by multiplying the length to the width of your house. Round your findings to the nearest foot, and enter this into the calculator above.
If your roof has a pitch greater than 3 in 12, then you'll want to include the overhang in your measurements. For example, if your roof's overhang is 12 inches, then you need to add 24 inches, or 2 feet, to the length and 2 feet to the width of your house. Multiply the length and width measurements (that include the overhang), and enter this number in the calculator above.