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 Rafter Run Outer Wall 3' 4' 5' 6' 7' 8' 9' 10' 11' 12' 13' 14' 15' 16' 17' 18' 19' 20' 21' 22' 23' 24' 25' 26' 27' 28' 29' 30' _ 1" 2" 3" 4" 5" 6" 7" 8" 9" 10" 11" _ 1/16 1/8 3/16 1/4 5/16 3/8 7/16 1/2 9/16 5/8 11/16 3/4 13/16 7/8 15/16 Roof Angle Pitch to Angle Overhang (level) _ 1' 2' 3' 4' 5' 6' _ 1" 2" 3" 4" 5" 6" 7" 8" 9" 10" 11" _ 1/16 1/8 3/16 1/4 5/16 3/8 7/16 1/2 9/16 5/8 11/16 3/4 13/16 7/8 15/16 Rafter Depth 3" 4" 5" 6" 7" 8" 9" 10" 11" 12" 13" 14" 15" 16" 17" 18" _ 1/16 1/8 3/16 1/4 5/16 3/8 7/16 1/2 9/16 5/8 11/16 3/4 13/16 7/8 15/16 Birdsmouth Plumb Birdsmouth Seat _" 1" 2" 3" 4" 5" 6" 7" 8" _ 1/32 1/16 3/32 1/8 5/32 3/16 7/32 1/4 9/32 5/16 11/32 3/8 13/32 7/16 15/32 1/2 17/32 9/16 19/32 5/8 21/32 11/16 23/32 3/4 25/32 13/16 27/32 7/8 29/32 15/16 31/32 Wall Thick 2" 3" 4" 5" 6" 7" 8" 9" 10" 11" 12" 13" 14" 15" 16" 17" 18" _ 1/16 1/8 3/16 1/4 5/16 3/8 7/16 1/2 9/16 5/8 11/16 3/4 13/16 7/8 15/16 Show Feet Inches
Rafter Calculator

Consider Ridge Thickness in determining Rafter Run to Outer Wall
eg: Half buiding width minus 1/2 ridge thickness.

Print full scale Rafter Plumb Cut Templates and Birdsmouth Templates
Fold template over rafter to mark or cut through.

Diagram width to height ratio is not to scale. Rafter depth scale is increased to allow dimension labeling.

 Angle Overhang

Birds-mouth
Use ◄ and ► (cursor) Keyboard Keys to scale Birds-mouth.

 Remember to allow for Ridge Thickness in Rafter Run to Outer Wall.

Rafter Run to Outer Wall

 Building Width 3' 4' 5' 6' 7' 8' 9' 10' 11' 12' 13' 14' 15' 16' 17' 18' 19' 20' 21' 22' 23' 24' 25' 26' 27' 28' 29' 30' _ 1" 2" 3" 4" 5" 6" 7" 8" 9" 10" 11" _ 1/16 1/8 3/16 1/4 5/16 3/8 7/16 1/2 9/16 5/8 11/16 3/4 13/16 7/8 15/16 Ridge Thick _ 1" 2" 3" 4" 5" 6" 7" 8" _ 1/16 1/8 3/16 1/4 5/16 3/8 7/16 1/2 9/16 5/8 11/16 3/4 13/16 7/8 15/16

Need these calculations on-site? Try the site with an iPad or Android Tablet. With a tablet, you can directly measure angles for input to the Roofing and Pitch Angle calculator apps. Lay the tablet on an incline and tap to measure angle. Tap again to capture angle and auto calculate roof, pitch, angles etc. The buttons appear automatically when you visit with a device capable of pitch measurement.

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To fine tune Slider Controls click to select and use (cursor) keyboard keys.

Open new window containing only diagram images in current page ↓ This will better fit printed page. Printing to Scale Help

Your iPad, iPhone or Android Tablet or Phone is a valuable On-Site tool!
Lay your phone or tablet on an angled surface (roof ?) to directly measure angles and automatically calculate Roofing and Pitch Angle Apps.

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 Contact Greg Tarrant - ph: (Australia) +61 7 40987645 - mob: 0438 165 753