Roof Calculations includes material Quantities, but in addition to material quantities Roof Bevels and Rafter lengths can also be calculated, traditionally Roof Bevels and Rafter lengths were determined geometrically by either marking out a sheet of plywood, using a Steel square known as the "Steel Square" method, or a method known as "Direct method" which is simply marking out the geometry on a piece of timber.

​mastertradeskills.com recommends calculating Roof Bevels and Rafter lengths using Trigonometry, and considers this method more efficient and accurate than the traditional methods, and it's easier than you think, the formula's developed by mastertradeskills.com are easy to follow and will make you look like a master tradesman/woman in no time.

Converting "Pitch Ratio"

A common method of describing the angle or slope of a roof is called "Pitch Ratio", this is expressed as (for example) "1 : 1.732 = 1 to 1.732, and it describes a right angle triangle that has a 1 metre vertical side (known as the Rise) and a 1.732 metre Horizontal side (known as the Run), this can be converted to "Rise/m Run" and "Roof Pitch" (Degree's) with simple Trigonometric calculations.
​The "Pitch Ratio Converter" (below) can be used to check your Pitch Ratio Conversion.
​Enter you "Pitch Ratio" (Run dimension only)

Appizy

Enter Pitch ratio here

Roof Pitch (in Degrees)

°

Rise per metre run

m

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mastertradeskills.com Calculators

mastertradeskills.com has developed Mobile friendly Web Apps for construction Calculations, such as the "Pitch Ratio Converter", *Eave Drop Off Calculator and *Roof Bevel Generator and has more useful Apps in development.

​The Pitch Ratio Converter is completely Free to use!

​mastertradeskills.com envisages that there will be more Free Apps released in the future, while "Premium" Apps will only be found on Premium content pages (coming soon).

​*Premium page content