Calculators - Estimators - Template Generators
Tell a Friend!

Wall Length
Rafter Thickness
Wall Width
Rafter Depth
Roof Angle
Hip Thickness
Overhang (level)
Hip Depth
Include diagram with 4 individual roof segments and dimensions (flat)
Extend Roof sheets extended past rafter ends (on angle)
Ridge Thickness
Include running measurements plan for ridge, wall and hip placement
Ridge Depth
Rafter Spacing
Hip Adjustment Birds-mouth or Chamfer Hip to drop level with common rafters

Rafter Spacing Type

Birdsmouth Seat Cut  
Calculate Plumb and Seat cuts from roof angle

Possible alternate centres

Label Diagram

Email this Calculation Creates a link to save or Email current calculation

Use < and > keyboard keys to animate roof angle. - Rafter Detail (new window)

Print rafter cutting templates, fold over rafter and cut through.

Birds-mouth Templates
Roof Angle

Circular Saw Bevel Setting Hip and Creeper Side Cut Settings If using a Circular Saw or Compound Mitre saw, set saw bevel angle to 45° to obtain Creeper and Hip side angles.
With the saw bevel angle set to 45°, cutting hips and creepers at the plumb cut angle will produce correct side angles.
See Saw Mitre and Blade Angle Settings

Left click, release then drag to measure at scale in diagram below - Enlarge diagram scale for more accurate measurements.


Print full scale templates and fold over wood. Cut through template or place on compound mitre saw to set angles.

Show Adjustments for Dutch Gable

Optimum Creeper Length?
From the optimum creeper length you can cut 1st + last, 2nd + 2nd last, 3rd + 3rd last etc creepers.

Save, Email and Re-load Current Calculation Click Email this Calculation to display a shortened URL containing the current calculator input values.

Click this link to send an Email, which once opened (on your tablet or phone?) will re-open this page with the saved calculator input and results.

You can also copy (save) and paste the shortened URL directly into the browser address bar to re-load the saved calculation results anytime.

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.

View page on Phone

Create PDF files to print diagrams on current page. Print large images over multiple pages Printing to Scale Help and Plan Printing.

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

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

If you've benefited from this free service please consider a small donation to:
Blue Dragon Childrens Foundation

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

Please help spread the word about this free service - Tell a Friend Tell a Friend
Questions or Suggestions? ph: +61 7 40987645

All calculators on this site are GEOMETRIC only. Check loacl regulations for sizes, spacings and all engineering requirements.

Disclaimer   |   Privacy & Cookie Policy


Copyright © Greg Tarrant -