All 108 Roofing Calculators
Every free roofing calculator on RoofAreaCalc, organized by category. From basic roof area to advanced structural loads — find the right tool for your project.
108 calculators · 12 categories · Free forever
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 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 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 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 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 Butterfly Roof Calculator
Calculate area and drainage for a V-shaped butterfly roof
intermediate Sawtooth Roof Calculator
Calculate area for industrial sawtooth roofs with multiple ridges
advanced Roof Pitch Calculator
Calculate roof pitch from rise and run, convert between degrees, ratios, and percentages
basic Roof Slope Calculator
Calculate slope percentage and angle from roof measurements
basic Roof Angle Calculator
Convert roof pitch to degrees and calculate the exact angle of your roof
basic Pitch Multiplier Calculator
Find the pitch correction factor to convert footprint area to actual roof area
basic Rise and Run Calculator
Calculate roof rise, run, and rafter length from any two measurements
basic Roof Pitch Chart & Reference
Complete reference chart of all standard roof pitches with angles, multipliers, and recommendations
basic Minimum Roof Pitch Calculator
Find the minimum recommended pitch for your roofing material
basic Steep Roof Calculator
Special considerations and calculations for steep-slope roofs (over 9:12)
intermediate Shingle Calculator
Calculate how many bundles of shingles you need for your roof
basic Metal Roof Calculator
Calculate metal roofing panels, trim, and fasteners needed
intermediate Tile Roof Calculator
Calculate clay or concrete roof tiles needed with waste factor
intermediate Roof Underlayment Calculator
Calculate rolls of felt or synthetic underlayment for your roof
basic Roof Sheathing Calculator
Calculate plywood or OSB sheets needed for roof decking
basic Roofing Nails Calculator
Calculate the number and weight of roofing nails needed
basic Ice & Water Shield Calculator
Calculate ice and water barrier membrane needed for eaves and valleys
basic Roof Waste Calculator
Calculate material waste factor based on roof complexity and hip/valley count
basic Slate Roof Calculator
Calculate natural or synthetic slate tiles needed for your roof
intermediate Wood Shake Calculator
Calculate cedar shakes or wood shingles needed for your roof
intermediate TPO Roof Calculator
Calculate TPO single-ply membrane for commercial flat roofs
intermediate EPDM Roof Calculator
Calculate EPDM rubber roofing membrane for flat roofs
intermediate Roof Coating Calculator
Calculate roof coating coverage for restoration and waterproofing
basic PVC Roof Calculator
Calculate PVC membrane roofing for flat and low-slope roofs
intermediate Rolled Roofing Calculator
Calculate mineral-surface rolled roofing for sheds and low-slope roofs
basic Rafter Calculator
Calculate rafter length, birdsmouth cut, and tail length for your roof
intermediate Roof Truss Calculator
Calculate truss dimensions, spacing, and quantity for your roof
advanced Snow Load Calculator
Calculate snow load on your roof based on location and roof geometry
intermediate Roof Load Calculator
Calculate dead load, live load, and total roof load capacity
advanced Wind Load Calculator
Calculate wind uplift forces on your roof based on location and exposure
advanced Birdsmouth Cut Calculator
Calculate birdsmouth notch dimensions for rafter-to-wall plate connection
intermediate Roof Span Calculator
Calculate maximum allowable roof span based on lumber size and species
intermediate Ridge Beam Calculator
Calculate ridge beam size based on span, load, and rafter configuration
advanced Purlin Calculator
Calculate purlin size, spacing, and quantity for roof support
intermediate Collar Tie Calculator
Calculate collar tie dimensions and placement for rafter reinforcement
advanced Roof Replacement Cost Calculator
Estimate total roof replacement cost including materials, labor, and disposal
basic Roof Repair Cost Calculator
Estimate repair costs for leaks, damaged shingles, and other common issues
basic Metal Roof Cost Calculator
Compare costs of standing seam, corrugated, and metal shingle roofing
basic Shingle Cost Calculator
Estimate asphalt shingle costs by type: 3-tab, architectural, and designer
basic Roof Tear-Off Cost Calculator
Estimate cost to remove old roofing including labor and disposal fees
basic Roofing Labor Cost Calculator
Estimate labor costs based on roof size, complexity, and regional rates
basic Roof Material Comparison
Compare costs and lifespan of different roofing materials side by side
basic Roof Financing Calculator
Calculate monthly payments for roof financing and loan options
basic Roof ROI Calculator
Calculate return on investment for roof replacement or upgrade
intermediate Roof Insurance Claim Calculator
Estimate your roof insurance claim value and out-of-pocket costs
intermediate Roof Insulation Calculator
Calculate insulation thickness and R-value needed for your climate zone
intermediate Attic Insulation Calculator
Calculate how much insulation to add to your attic for optimal efficiency
basic R-Value Calculator
Calculate total R-value for multi-layer roof and attic assemblies
intermediate Roof Energy Savings Calculator
Calculate annual energy savings from roof insulation and material upgrades
intermediate Roof Heat Loss Calculator
Calculate heat loss through your roof and potential energy savings
advanced Cool Roof Calculator
Calculate energy savings from reflective cool roof coatings
intermediate Spray Foam Roof Calculator
Calculate spray foam insulation coverage and cost for roof applications
intermediate Radiant Barrier Calculator
Calculate energy savings from installing a radiant barrier in your attic
intermediate Gutter Size Calculator
Calculate the correct gutter size based on roof area and rainfall intensity
intermediate Downspout Calculator
Calculate number and size of downspouts needed for your gutter system
basic Gutter Cost Calculator
Estimate gutter installation costs by material type and linear footage
basic Rainwater Collection Calculator
Calculate rainwater harvest potential from your roof area
basic Gutter Slope Calculator
Calculate the correct slope/grade for gutter installation
basic Roof Drainage Calculator
Calculate drainage requirements for flat and low-slope commercial roofs
intermediate Gutter Guard Calculator
Calculate gutter guard materials needed and compare costs by type
basic French Drain Calculator
Calculate french drain dimensions for foundation drainage from roof runoff
intermediate Attic Ventilation Calculator
Calculate Net Free Area (NFA) needed for balanced attic ventilation
intermediate Ridge Vent Calculator
Calculate ridge vent length needed for proper attic exhaust
basic Soffit Vent Calculator
Calculate soffit vent quantity for balanced intake ventilation
basic Roof Vent Calculator
Calculate total ventilation requirements using the 1:150 or 1:300 rule
basic Gable Vent Calculator
Calculate gable vent size needed for cross-ventilation
basic Turbine Vent Calculator
Calculate number of turbine (whirlybird) vents needed for your attic
basic Power Vent Calculator
Calculate powered attic ventilator (PAV) CFM requirements
intermediate Drip Edge Calculator
Calculate linear feet of drip edge needed for roof eaves and rakes
basic Ridge Cap Calculator
Calculate ridge cap shingles or metal ridge cap needed
basic Flashing Calculator
Calculate step flashing, valley flashing, and chimney flashing materials
intermediate Soffit Calculator
Calculate soffit panels and materials for roof overhangs
basic Fascia Calculator
Calculate fascia board materials for roof edge finishing
basic Starter Strip Calculator
Calculate starter strip shingles needed for roof edges
basic Valley Calculator
Calculate valley length, flashing, and materials for roof valleys
intermediate Chimney Flashing Calculator
Calculate flashing materials needed around chimneys and roof penetrations
intermediate Skylight Calculator
Calculate skylight sizing, framing, and flashing requirements
intermediate Roof Sealant Calculator
Calculate roof sealant and caulk needed for seams and penetrations
basic Roof Lifespan Calculator
Estimate remaining roof life based on material, age, and conditions
basic Roof Leak Repair Cost Calculator
Estimate repair costs for common roof leak scenarios
basic Roof Inspection Calculator
Score your roof condition with an interactive inspection checklist
basic Shingle Replacement Calculator
Calculate materials needed for partial shingle repair or replacement
basic Roof Maintenance Cost Calculator
Estimate annual maintenance costs based on roof type and age
basic Roof Depreciation Calculator
Calculate current roof value accounting for age and wear
intermediate Roof Moss Treatment Calculator
Calculate moss treatment solution and zinc strip needs for your roof
basic Solar Roof Calculator
Calculate how many solar panels fit on your roof and estimated energy production
intermediate Solar Panel Area Calculator
Calculate usable roof area for solar panel installation
basic Solar Roof Savings Calculator
Calculate long-term energy savings and payback period for solar roofing
intermediate Green Roof Calculator
Calculate materials, weight, and cost for a vegetated green roof
advanced Solar Shingle Calculator
Calculate solar shingles needed vs traditional panels for your roof
intermediate Solar Panel Weight Calculator
Calculate total weight of solar panel system for structural assessment
basic Rain & Sun Harvest Calculator
Calculate combined rainwater and solar energy harvest from your roof
intermediate Commercial Roof Calculator
Calculate materials and costs for flat commercial roofing projects
advanced Garage Roof Calculator
Calculate materials for detached garage and carport roofs
basic Porch Roof Calculator
Calculate materials and dimensions for porch and patio roof covers
basic Barn Roof Calculator
Calculate dimensions and materials for agricultural barn roofs
intermediate Pergola Roof Calculator
Calculate roofing materials for pergola and pavilion covers
basic A-Frame Roof Calculator
Calculate dimensions and materials for steep A-frame cabin roofs
intermediate Rooftop Deck Calculator
Calculate load requirements and materials for a rooftop deck or terrace
advanced Cupola Calculator
Calculate cupola size, ventilation, and placement for your roof
intermediate