Roof Replacement Cost Calculator
Estimate a simple roof replacement budget from footprint, pitch, waste, roofing materials, tear-off, installation labor and accessory allowances.
Default project preview
$18,047.69
Roof area
1,610 ft²
Material order area
1,803 ft²
Roofing materials
$6,491.39
Tear-off and disposal
$2,978.44
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Roof area = footprint area × √(1 + slope ratio²). Material area adds waste. Total cost adds materials, tear-off, labor, accessories and fixed allowances.
FAQ
Roof Replacement Cost Calculator questions
Does footprint area equal roof area?+
Not on a sloped roof. The calculator applies a slope factor to estimate the surface area.
Are sheathing repairs included?+
Only when the fixed or accessory allowance includes them. Unknown deck damage is commonly priced separately.
Why use a waste allowance?+
Starter strips, hips, ridges, valleys, cuts and damaged material make ordered coverage exceed measured roof area.