Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Roof Area Calculator

Calculate the true sloped surface area of a roof from its footprint dimensions and pitch angle. The slope multiplier (1/cos(pitch)) corrects for the fact that a pitched roof has more material area than the horizontal footprint it covers.

Roof Length (m)

Roof Width (m)

Roof Pitch (degrees)

Fill in the required fields to see your result.

Construction

Tile Quantity Calculator

Estimate how many tiles you need for a floor or wall, including a built-in 10% allowance for cuts and breakage. Multiply the floor area by the inverse tile area, round up, then add 10%.

Floor Length (m)

Floor Width (m)

Tile Length (m)

Tile Width (m)

Fill in the required fields to see your result.

Key differences

	Roof Area Calculator	Tile Quantity Calculator
Category	Construction	Construction
Inputs required	3	4
Result	Roof Surface Area (m²)	Tiles Needed (with 10% waste) (pieces)
What it does	Calculate the true sloped surface area of a roof from its footprint dimensions and pitch angle. The slope multiplier (1/cos(pitch)) corrects for the fact that a pitched roof has more material area than the horizontal footprint it covers.	Estimate how many tiles you need for a floor or wall, including a built-in 10% allowance for cuts and breakage. Multiply the floor area by the inverse tile area, round up, then add 10%.