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Inch or
The main Navigation tabs at top of each page are Metric - inputs in millimeters (mm)
For Inch versions, directly under the main tab is a smaller 'Inch' tab for the Feet and Inch version.
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Gazebo Geometry Calculator - Inch
Select creepers with center rafter and spacing options, or number of noggings with no creepers. (Select and see diagrams)

Creates a link to save or share current calculation
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Gazebo Sides
Kingpost face is equal to rafter thickness
Rafter Thick
Roof Angle Roof angle is steeper than hip rafter angle ° = : 12 Rafter Depth

Length from any outer floor corner point to centre. Or radius of outer floor circle

Level overhang
Eave Overhang
Birds-mouth Seat
Extend Roof Sheeting overhang past common (center) rafter end
Roof Extension

Rafter Spacing

Gazebo calculator floor only plan view diagram

Roof and Floor
Gazebo calculator floor plan diagram
Roof Segments
Gazebo roof segments diagram
Gazebo kingpost diagram Gazebo roof rafter center join bracket diagram

Roof Centre Bracket and Kingpost Templates

Print Centre Bracket Template If you're using a steel bracket to fix the rafters at the centre Print a Paper Template to mark out the bracket.
You can also use this template to mark out the Kingpost.

Floor Plan
6 Sided Hexagon Area ft²
Triangle Side Lengths (Radius)
Triangle Section Center length
Triangle Section Area ft²
Side Lengths
Floor Width at Widest Point

Roof Plan
Roof Angle °
Rafter Spacing (outer edge)
Hip Rafter Angle °
Hip Rafter Total Length
Hip Rafter Plumb Angle °
King Post Radius
King Post Face Width
King Post Min Bounding Rectangle
Roof Height Above Plate
Roof Segment Outer Width
Roof Segment Center Length
Roof Segment Sides Length
Roof Segment Inner Angle °
Roof Segment Outer Angles °
Roof Segment Area ft²
Total Roof Area ft²
Roof Width at Widest Point

Sides    Angle    Rotate

Gazebo roof profile diagram

Gazebo roof hip rafter diagram
Birdsmouth Templates (new window)

Cutting hip plumb and side angles with Circular Saw To cut hip tail plumb and side angles with a circular saw: (only with bottom plumb cut)

DON'T BREATH THE DUST If you're cutting blocks, concrete, stone or ANYTHING and there's DUST - DON'T TAKE THE RISK
Don't cut it, or cut it wet so there's NO DUST - Silicosis Sucks
And if you're cutting wet, wear a mask - theres dust in the spray mist too!

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Check relevant local regulations for appropriate sizes, spacings and all engineering requirements.

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