Roof planes and finishing quantities.
Measure supplied roof surfaces and separately order laps, ridge pieces, gutters and soffits.
Choose the matching calculation
Roof Plane Area Calculator
Sum the geometric area of specified roof planes from horizontal run, rise and ridge length.
Roof Covering Units Calculator
Count effective roof-covering rectangles per plane and separately specified ridge-cap units.
Roof Membrane Roll Lap Calculator
Count membrane courses and rolls for supplied roof-plane dimensions and specified side and end laps.
Ridge Cap Effective Cover Calculator
Count cap pieces across supplied ridge runs using the effective exposed length after specified overlap.
Gutter Run Stock Calculator
Count standard gutter lengths and supplied fittings across separate runs.
Soffit Strip Cut Quantity Calculator
Count soffit strips cut across an overhang, using full source lengths and the installed strip coverage width.
Equal-Pitch Hip Roof Geometry Calculator
Combine two trapezoidal and two triangular planes of a specified symmetric hip roof.
Measure and check your assumptions
Keep a hip roof’s plan dimensions separate from sloped plane dimensions
Why is rectangular plan area smaller than a supplied four-plane roof surface?
Keep nominal roofing dimensions separate from effective coverage
Does the whole product rectangle cover the same usable roof area?
Do not pool ridge lengths without checking cap cuts and overlaps
Does the sum of short ridge runs prove a whole-piece purchase count?
Gutter stock quantity does not establish drainage capacity
What does a run-length and fitting takeoff leave unanswered?
Account for both side and end laps in roof rolls
Which two overlap directions affect a rectangular membrane order?
Compare ridge cap physical and exposed length
Why is exposed length the correct increment after the first cap?
Separate gutter stock and fitting schedules
Which fittings can be inferred from straight stock joins and which must be supplied?
Keep the estimate within scope
Use your measured geometry and already supplied product specifications. Counts and quantities do not select a construction system or establish code compliance.
Collect chosen results in a free browser material project. Alternative scenarios remain separate orders.