6 calculators in this category
- Roof Pitch CalculatorIRC 2021 R905 slope limitsRoof pitch is written as rise in inches over a 12-inch run, but almost every calculation you need it for wants a different…
- Roof Area CalculatorSlope-factor method; 1 roofing square = 100 ft²You can take off an entire roof from the ground. Measure the building's length and width, read the pitch off a rafter or a…
- Rafter Length CalculatorIRC 2021 R802 rafter framingA common rafter is cut to a line length — the distance along its top edge from the ridge plumb cut to the heel of the…
- Shingle Bundle & Roofing Squares CalculatorIRC 2021 Chapter 9 (Roof Assemblies)Enter the sloped area of your roof and this calculator returns the full asphalt-shingle takeoff: roofing squares including…
- Hip & Valley Rafter Length CalculatorEqual-pitch hip and valley geometryGive this calculator the common rafter run and the roof pitch and it returns everything you need to cut a hip or a valley: the…
- Rafter Birdsmouth & HAP CalculatorIRC 2021 rafter notch limitsThe birdsmouth is the notch that lets a sloping rafter sit flat on a level top plate. Get it wrong and you either lose bearing…