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Calculators
Roof Pitch CalculatorCalculate roof pitch from rise and horizontal run, with angle, percentage and slope multiplier.Roof Pitch ConverterConvert rise per 12, degrees, percentage slope and slope multiplier without changing geometry.Rafter Length CalculatorCalculate common-rafter line length from horizontal run or symmetrical gable span and roof pitch.Roof Area CalculatorEstimate sloping surface area for supported simple gable, shed and direct plan-area forms.Roof Slope Factor CalculatorCalculate the slope multiplier used to convert compatible plan area or run to sloping values.Rise Run CalculatorSolve supported right-triangle pairs for rise, run, slope length and angle.Roof Material EstimatorApply editable waste and visitor-supplied product coverage after calculating roof area.Multi-section Roof WorkbenchCombine labelled supported roof sections, save locally and export an auditable geometry record.
Guides
Roof Geometry GuidesA curated guide index for roof pitch, measurement, area, common-rafter geometry and records.Roof Pitch Slope Angle and MultiplierUnderstand the four common descriptions of roof steepness and how they relate.How to Measure Roof Pitch SafelyUse plans, accessible interior information or ground-based measurements without climbing onto a roof.Roof Span vs Horizontal RunDistinguish total building span from the one-side horizontal run used in roof triangles.Plan Area vs Roof Surface AreaUnderstand the difference between horizontal footprint and sloping planar roof surface.Common Rafter Geometry and LimitsFollow the right-triangle line calculation without treating it as structural or cutting advice.Gable Roof GeometryModel a supported symmetric gable as two planar slopes meeting at a centred ridge.Shed and Mono Pitch Roof GeometryModel a supported one-plane roof from horizontal run, pitch and plan area.Hips Valleys Dormers and IntersectionsUnderstand why complex roof junctions cannot be reduced to one slope multiplier.Overhang Eave and Ridge AdjustmentsKeep horizontal line adjustments explicit when calculating slope length or plan area.Metric and Imperial Roof MeasurementUse exact length conversions while keeping pitch ratios independent of unit choice.Divide an Irregular Roof into SectionsRecord an irregular project as separately measured supported planar sections.Read Check and Export Roof ResultsDistinguish calculated values, user assumptions and warnings in a RoofFigured record.
Method safety and trust
Calculation MethodologyReview RoofFigured formulas, precision, rounding, assumptions and validation.Formula Tests and Change LogSee human-readable RoofFigured validation fixtures and calculation-version history.Sources Corrections and Editorial PolicyReview RoofFigured’s source register, rights approach, review dates and correction process.Roof Safety BoundaryUse RoofFigured without climbing onto a roof and consult current official safety guidance.About RoofFiguredLearn what RoofFigured calculates, who it is for and where its scope stops.
About and policies
Roof Geometry CalculatorsChoose a transparent RoofFigured calculator for pitch, triangles, rafter lines, roof area, material coverage or multi-section records.Contact RoofFiguredReport a correction, accessibility barrier or product issue through Maple Web Group.Accessibility StatementRead the implemented accessibility approach and how to report a barrier.Privacy NoticeUnderstand local calculations, browser storage and the data RoofFigured does not collect.Cookie and Storage NoticeSee which browser storage RoofFigured uses and how to clear saved choices.Terms of UseUse RoofFigured as a bounded informational geometry and planning aid.All RoofFigured PagesA complete human-readable index of RoofFigured calculators, guides and trust pages.