Roof Tile Calculator – Estimator Tiles and Cost Easily

When constructing or renovating a roof, one of the most important steps is calculating how many tiles you’ll need — and how much it will cost. A Roof Tile Calculator helps you quickly estimate the number of roof tiles and total cost based on roof size, slope, tile dimensions, and waste allowance.

Whether you’re using clay, concrete, or metal tiles, knowing the correct number ensures accuracy, minimizes waste, and keeps your budget under control.

Step 1: Calculate Roof Area

If your roof is flat, the area is simple:

$\text{Roof Area}=\text{Roof Length}\times \text{Roof Width}$

If your roof is sloped, multiply by the slope factor (based on pitch angle):

$\text{Sloped Roof Area}=(\text{Roof Length}\times \text{Roof Width})\times \text{Slope Factor}$

Where:

$\text{Slope Factor}=\frac{1}{cos\left(\theta \right)}$

and $\theta$ = roof pitch angle in degrees.

Step 2: Adjust for Waste

To account for cutting, overlaps, and breakage, we add a waste percentage:

$\text{Adjusted Roof Area}=\text{Sloped Roof Area}\times \left(1+\frac{\text{Waste Percentage}}{100}\right)$

Step 3: Calculate Number of Tiles Required

Each tile covers a certain area based on its dimensions:

$\text{Tile Area}=\text{Tile Length}\times \text{Tile Width}$

Now divide the total adjusted area by the area of one tile:

$\text{Number of Tiles}=\frac{\text{Adjusted Roof Area}}{\text{Tile Area}}$

Step 4: Calculate Total Cost

Finally, multiply the number of tiles by the cost per tile:

$\text{Total Cost}=\text{Number of Tiles}\times \text{Cost per Tile}$

Example Calculation

Let’s calculate an example:

• Roof Length = 30 ft
• Roof Width = 20 ft
• Roof Pitch = 25°
• Tile Length = 1.5 ft
• Tile Width = 1 ft
• Waste = 10%
• Cost per Tile = ₹120

Step 1: Find Roof Area

$\text{Roof Area}=30\times 20=600\text{sq ft}$

Step 2: Find Slope Factor

$\text{Slope Factor}=\frac{1}{cos(25°)}=1.103$

Step 3: Sloped Roof Area

$\text{Sloped Roof Area}=600\times 1.103=661.8\text{sq ft}$

Step 4: Adjust for Waste

$\text{Adjusted Roof Area}=661.8\times (1+\frac{10}{100})=728.0\text{sq ft}$

Step 5: Calculate Tile Area

$\text{Tile Area}=1.5\times 1=1.5\text{sq ft}$

Step 6: Number of Tiles

$\text{Number of Tiles}=\frac{728.0}{1.5}=485.3\approx 486\text{tiles}$

Step 7: Total Cost

$\text{Total Cost}=486\times 120=\text{₹}58,320$

Final Results:

• Roof Area = 600 sq ft
• Adjusted Roof Area = 728 sq ft
• Number of Tiles = 486 tiles
• Total Cost = ₹58,320