Roof framing hub
Rafter sizing, pitch, and roof takeoff
Start with the framing math, then check pitch and structural span before you cut.
Rafter Length Calculator →Roof and framing math, done right.
13 free calculators for roof framing, roofing takeoff, and lumber math. Built for the job site: fast, no signup, with a live diagram on every geometry tool.
Pick the job, not just the tool — each hub links the calculators that go together.
Roof framing hub
Start with the framing math, then check pitch and structural span before you cut.
Rafter Length Calculator →Roofing takeoff hub
Turn a roof area into an exact material order, for shingle or metal roofing.
Shingle Calculator →Cost & materials hub
Estimate total cost, then check the lumber and area numbers behind it.
Roof Replacement Cost Calculator →Bundles, squares, and nails from roof area, exposure, and waste factor.
Panel count, panel length, and fasteners for standing-seam and corrugated metal.
Total and per-square cost range by material, tear-off, and complexity.
Converts roof area to squares (100 sq ft units) for material ordering.
Hub calculator: area, materials, and cost in one pass, linking to every specialized tool.
True roof area from footprint, pitch, roof type, and overhang.
Sums multiple roof sections of different shapes into one total area.
Converts between x/12 pitch, degrees, and percent slope.
Slope factor and correction multiplier for any pitch from 1/12 to 24/12.
Rafter run, rise, length, and cut angles from span, pitch, and overhang.
Board feet and cost from thickness, width, length, and quantity.
Seat cut, heel plumb, and heel height above plate for a birdsmouth notch.
Maximum allowable joist span from published span tables by species, grade, and load.