`"Roof "_"area" = f( "length" , S ,"4/12") `

Enter a value for all fields

The Area of a Gable Roof calculator computes the total surface area of a roof, the number of 4x8s, the number of bundles of shingles and the number of roofing nails needed for a roof based on the length, span, pitch and overhang.  

INSTRUCTIONS:  Choose units and enter the following:

• (L) Ridge Length (Includes overhang)
• (S) Span of Roof.
• (oH) Overhang 
• (P) Pitch of Roof

Roof Area (A): The calculator returns the surface area of the roof in square feet.  However, this can be automatically converted to compatible units via the pull down menu.  The calculator also returns:

• (4x8) number of 4x8 sheets to cover roof area
• (n3Tab) number of standard (33.3 ft²) bundles of shingles needed to cover roof area
• (nArch) number of architectural (32.8 ft2) bundles of shingles needed to cover roof area.
• (nRN Normal) number of roofing nails for normal wind conditions
• (nRN High Wind) number of roofing nails for high-wind conditions.

Single Price Survey Data

The Roofing Shingles Cost Survey list the observed price of a bundle of shingles. A bundle is equal to roughly (33 1/3 ft²) or one third of a roofing square (100 ft²). The shingle price survey includes a date, the name of the store, and the five price points for shingles: economy, low, median, high and premium. One should use the pricing for roofing materials that can be bought locally.  However, the following prices are for different quality grades of shingles in the United States:

• Shingle Price Survey Date: 12/22/22
  • Cost of Premium Shingles: $90.0 USD.
  • Cost of High Grade Shingles: $52.34 USD.
  • Cost of Medium Grade Shingles: $43.32 USD.
  • Cost of Low Grade Shingles: $37.98 USD.
  • Cost of Economy Grade Shingles: $36.0 USD.

All prices are for one bundle of shingles which cover 33.33 ft². 

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Gable Roof Calculators

• Gable Roof Area: This computes the surface area of a gable roof based on dimensions and pitch.
• Trusses Needed for Roof: This computes the number trusses need for a roof including gabled roof.
• 4x8 Sheathing for Gable Roof: This computes the total surface area of a roof, the number of 4x8s and framing nails needed for a gabled roof based on the length, span, pitch and overhang.
• Gable Roof Sheathing Cost: This computes the number of 4x8 sheets (32 ft² each) needed to cover a gabled roof based on the ridge length, roof span, overhang and the pitch and applies the unit cost of a 4x8.
• Nails for Gable Roof Sheathing: This computes the approximate number of nails needed to nail 4x8 sheets to trusses or rafters on a roof based on the dimensions of the roof, spacing of nails on the edges and field of the 4x8, and whether blocking or clips are use.
• Purlins for Gable Roof: This computes the total number and length of purlins for a simple gable roof based on the ridge length of the roof, the roof pitch and the span of the roof.
• Metal for Gable Roof: This estimates the metal panels and trim needed for a metal roof for a simple gabled roof based on the roof dimensions.
• Metal Screws for Gable Roof: This computes the number of special screws needed for a metal roof. 
• Shingles for Gable Roof: This computes the number of shingles (bundles), underlayment, ridge shingles, starter strip, and roofing nails for a gable roof.
• Gable Roof Shingle Cost: This estimates to shingle a basic gable roof based on dimensions (length, span, pitch and overhang) and the unit price of a bundle of shingles.
• Underlayment for Gable Roof: This estimates the cost of underlayment to cover a basic gable roof based on the area of a roof computed from the dimensions (length, span, pitch and overhang) and the unit price underlayment material. 
• Roofing Nails for Gable Roof: This estimates the number of roofing nails needed for a common gabled roof based on roof dimensions and wind conditions.
• Rafters for Gable Roof: This computes the total number of rafter boards (roof joists) for a gabled roof based on the ridge length, pitch and span.  It also returns the length of the ridge board, and the length and number of rafter ties and collar ties.
• Rafter Length: This computes the length of the rafters based on the span, pitch and overhang.
• Gable Roof Geometries: This computes the length of rafters, pitch and cut angles, soffit and facia base widths of a gable roof.
• Weight of Snow on Roof: This computes the weight of snow on a gable roof based on roof dimensions, depth and type of snow.

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Roof Types

Roofing Calculators

Gable Roof Area of Gable Roof Gable Roof 4x8 Sheathing Gable Roof Sheathing Cost Purlins for a Gable Roof Metal for a Gable Roof Screws for Metal Gable Roof Shingles for a Gable Roof Gable Roof Shingle Cost Underlayment for Gable Roof Nails for Gable Sheathing Roofing Nails for Gable Roof Rafters and Ties for Roof Rafters Length	Hip Roof Surface Area of Hip Roof Sheathing for Hip Roof Shingles for Hip Roof Roofing Nails for Hip Roof Cost of Shingles for Hip Roof Metal for Hip Roof Screws for Metal Hip Roof Purlins for Hip Roof Underlayment for Hip Roof Surface area for Double Hip Roof Hip Roof Geometries	Shed Roof Bundles of Shingles for Shed Roof Cost to Shingle a Shed Roof Underlayment and Cost for Shed Roof 4x8s for Shed Roof Metal Panels (Ag Panels) for Shed Roof Screws for Metal Panel Shed Roof Purlins for Shed Roof Trusses for Shed Roof Metal for Shed Roofed Animal Run-in
Dormers Surface Area of Dormers Metal for Dormers Screws for Metal Dormers 4x8s for Dormers Shingles for Dormers Roofing Nails for Dormers Purlins for Dormers	Pyramid Hip Roof Shingles for a Pyramid Roof 4x8 Sheathing for Pyramid Roof Underlayment for Pyramid Roof Metal Panels for Pyramid Roof Purlins for Pyramid Roof Pyramid Roof Geometries	Roofing Geometries Pitch to Slope Pitch to Angle Rise over Run to Angle Gambrel Angle Interface Angle Interface Angle from Rise over Run Trusses Needed for a Roof Area of Roof Section
Gambrel Roof Gambrel Roof Surface Area Gambrel Roof Shingles  Roofing Nails for Gambrel Roof Gambrel Roof Underlayment Purlins for Gambrel Roof Gambrel Roof Metal Panels Screw for Metal Gambrel Roof Gambrel Angle

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Building Calculators

• Total Building Materials Calculator
• Total Pole Barn Materials Calculator

• Area of a Roof
• Pitch of a Roof
• Number of Trusses Needed for a Roof
• 4x8s needed for a roof
• Shingles needed for a roof
• Number and Length of Metal Roof Panels
• Number and Length of Purlins
• Number and Length of Rafters
• Number and Length of Rafter and Collar ties

• Number and Length of wall top and bottom wall plates
• Number of Studs for a Room
• Number of Studs in a Wall
• Room Interior Area (wall and ceiling)
• Cubic Feet in a Room (volume)
• Number of 4x8 or 4x12 Sheets for a Room

• Number and Length of Floor Joists
• Number of Joist Hangers
• Compute the Cost of Floor Joists
• Compute iJoists for larger floors
• Compute the Number of 4x8 Sheets to cover the Deck or Floor
• Compute the number of Decking Boards to cover the deck or floor

• Insulation Materials and Cost Estimate Calculator