Calculate equal-pitch rectangular hip-roof area plus eave, ridge and hip lengths.
Trades & Professional Tools · Roofing
Enter your project measurements
Measured inputs · visitor-entered product and design assumptions
1EnterProvide the known values
2CalculateResults update automatically
3VerifyReview the details and units
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Measure using one consistent system. Product coverage, density, resistance, waste, and safety assumptions must come from the actual product data or project specification. Values stay in this browser.
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Calculate equal-pitch rectangular hip-roof area plus eave, ridge and hip lengths.
Roof takeoff keeps planes, pitch, edges, penetrations, valleys, ridges, and waste assumptions distinct before they become an order.
At a glance
See the field workflow
1Planes and traced edges→
2Slope geometry→
3Area and line summary
Read from measured conditions to the calculated field check. Each stage remains a separate assumption you can verify.
Plan length (m or ft)Plan span (m or ft)Pitch risePitch run
The relationship
The formula used here
Sloped area=plan area×pitch factor; ridge=max(0,length−span); each hip plan run=√((span/2)²+(span/2)²).
Apply this relationship only after confirming that the measurements, product basis, allowances, and units describe the same project condition.
Field reading
Use the result as a checked next step
1. Measure the real work
Use field dimensions, approved drawings, and actual product or stock information.
2. Reconcile the result
Trace every roof plane and linear component, confirm whether dimensions are plan or slope measurements, and reconcile the summed area with the building geometry.
3. Keep the boundary clear
It does not verify roof condition, safe access, drainage design, structure, product suitability, or installation requirements.
Quick guide
How to use this calculator
Choose the calculation mode or measurement system that matches the values you actually have.
Enter measured project dimensions and use product-specific coverage, density, yield, resistance, or waste data where requested.
Review the intermediate results before ordering material or applying the result on site.
Calculation method
Calculation method
Sloped area=plan area×pitch factor; ridge=max(0,length−span); each hip plan run=√((span/2)²+(span/2)²).
The calculator preserves full internal precision and rounds only displayed results. Quantity outputs round up when whole purchasable pieces are required.
Worked example
Worked example
A 12 m by 8 m hip roof at 6:12 has 107.33 m² of sloped area.
Sloped area=plan area×pitch factor; ridge=max(0,length−span); each hip plan run=√((span/2)²+(span/2)²).
Supported inputs
Precision and limits
Roof-system and drainage boundary
Roofing results use measured planes, traced linear components, counted penetrations, product effective coverage, approved fastening/ventilation criteria, local rainfall, and entered drainage capacities. They do not approve a roof assembly, slope, structure, wind or snow resistance, fastener schedule, drainage system, fall protection, warranty, repair, or code compliance.
Planning scope
This calculator supports measurement, estimating, and scenario planning. It does not inspect a site, select a product, certify a design, or replace drawings, specifications, manufacturer instructions, local codes, permits, or a qualified trade professional.
Measured and product-specific inputs
Nominal dimensions can differ from actual dimensions. Verify inside pipe diameters, actual lumber sizes, product coverage, bag yield, material density, conductor resistance, waste, and packaging against the materials used on the project.
Safety and regulatory limits
Electrical, HVAC, structural, excavation, roofing, pressure, lifting, and life-safety work may require jurisdiction-specific calculations and professional approval. Do not use a generic planning result as a code-compliance or safety determination.
Precision and privacy
Inputs accept bounded plain decimals. Calculations remain in this browser and raw entered project values are not submitted to 365CALCS.COM.
