40 calculators
Roof Area & Geometry Calculators
Calculate roof surface area for any roof type — gable, hip, mansard, flat, and more. All tools are free — no registration or download required.
Roof Area Calculator
Calculate the total surface area of your roof from building dimensions and pitch
basic Gable Roof Calculator
Calculate area, materials, and dimensions for a standard gable (A-frame) roof
basic Hip Roof Calculator
Calculate area and dimensions for a hip roof with slopes on all four sides
intermediate Roof Pitch Conversion Calculator
Convert between any two pitch formats: X:12 pitch, degrees, percentage, radians, and slope multiplier. Instant two-way conversion with pitch classification.
basic Flat Roof Calculator
Calculate area, drainage, and materials for flat or low-slope roofs
basic Roofing Square Calculator
Convert roof area to roofing squares (1 square = 100 sq ft)
basic Cross Gable Roof Calculator
Calculate area of two intersecting gable roofs at right angles including valley lengths and intersection geometry
intermediate L-Shaped Roof Calculator
Calculate total roof area for L-shaped floor plans — split sections with pitch adjustment and valley intersection geometry
intermediate Gambrel Roof Calculator
Calculate area and dimensions for a gambrel (barn) roof
intermediate Shed Roof Calculator
Calculate area and pitch for a single-slope shed or lean-to roof
basic Roof Overhang Calculator
Calculate eave and rake overhang dimensions and additional area
basic Roof Measurement Converter
Convert between roofing squares, bundles, square feet, and linear feet with pitch adjustment
basic Pyramid Roof Calculator
Calculate area of a 4-sided pyramid roof where all sides meet at a single apex point — for square structures, gazebos, and tower rooms
basic Cathedral Ceiling Area Calculator
Calculate interior surface area of a vaulted or cathedral ceiling for insulation, drywall, or paint estimation
basic Roof Area from Blueprint Calculator
Calculate true roof area from floor plan dimensions and pitch — input footprint shape and get slope-corrected area
basic Shed Dormer Calculator
Calculate shed dormer roof area, wall area, and framing materials — rafter length, sheathing sheets, and shingle bundles
intermediate Saltbox Roof Calculator
Calculate asymmetric saltbox roof area with different front and back slopes — rafter lengths and cut angles for both sides
intermediate T-Shaped Roof Calculator
Calculate total roof area for T-shaped floor plans including valley and ridge intersections at both junctions
intermediate Mansard Roof Calculator
Calculate area and dimensions for a mansard (French) roof with two slopes per side
advanced Dormer Calculator
Calculate dimensions and area added by roof dormers
intermediate Roof Footprint Calculator
Calculate the ground-level footprint area of your roof including overhangs
basic Gable End Area Calculator
Calculate the triangular wall area at gable ends for siding, painting, or cladding estimates
basic Roof Valley Length Calculator
Calculate the exact valley rafter length where two roof planes intersect — 3D geometry for any pitch combination
intermediate Dome Roof Calculator
Calculate hemispherical or partial-sphere roof area for observatories, round buildings, and architectural domes
intermediate Hexagonal Gazebo Roof Calculator
Calculate 6-sided gazebo roof area with six triangular panels from center peak — for pavilions and bandstands
basic Quonset Hut Roof Calculator
Calculate curved semi-cylindrical roof surface area, arc length, panel count, and end wall area for Quonset hut structures
intermediate Geodesic Dome Roof Calculator
Calculate panel counts, strut lengths, and covering area for 2V-6V geodesic domes — hubs, triangles, and materials
advanced Bay Window Roof Calculator
Calculate total area for 3-facet or 5-facet bay window roofs — facet areas, hip flashing lengths, and liner cost
intermediate Wrap-Around Porch Roof Calculator
Calculate total area for wrap-around porches — front run, side run, corner hip section, and post count
intermediate Dutch Gable Roof Calculator
Calculate area for a hybrid Dutch gable roof combining hip and gable elements
advanced Complex Roof Calculator
Calculate area for multi-section roofs with different pitches and shapes
advanced Conical Roof Calculator
Calculate cone-shaped roof area for turrets, silos, and round structures using radius, height, and slant height
intermediate Barrel Vault Roof Calculator
Calculate semi-cylindrical roof area for commercial buildings, barns, and Quonset huts using span, length, and rise
intermediate Jerkinhead Roof Calculator
Calculate area of a clipped gable (jerkinhead) roof — a gable end trimmed to a small hip for wind resistance
intermediate Hipped Dormer Calculator
Calculate hipped dormer area with 3 sloping planes — front face plus two triangular hip sides with ridge and hip rafter lengths
advanced Butterfly Roof Calculator
Calculate area and drainage for a V-shaped butterfly roof
intermediate Bonnet Roof Calculator
Calculate area of a bonnet (kicked eave) roof with steep upper slope and gentle lower slope extending as covered porch
intermediate Monitor Roof Calculator
Calculate area of a monitor roof — raised central section with windows on all 4 sides above two shed roof planes
intermediate Eyebrow Dormer Calculator
Calculate curved eyebrow dormer area using semi-ellipse geometry — barrel-curved sheathing and material estimation
advanced Sawtooth Roof Calculator
Calculate area for industrial sawtooth roofs with multiple ridges
advanced About Roof Area & Geometry
This category contains 40 specialized calculators covering all aspects of roof area & geometry. Whether you are a homeowner planning a project or a roofing contractor estimating materials, these tools give you accurate results based on industry-standard formulas.
Each calculator includes step-by-step guidance, example calculations, and explanations of the underlying formulas so you understand exactly how your numbers are derived. Results are suitable for budgeting and planning — always consult a licensed roofing professional before starting structural work.
How to Use These Calculators
Start by entering your roof's basic dimensions. Most calculators need length, width, and pitch at minimum. Results update instantly as you type. Use the unit toggle to switch between imperial (feet, inches) and metric (meters) measurements. All calculators are mobile-friendly and work on any device.