Elliptic Roof Calculator
Scope: 1st and 2nd Quadrants
Enter Ellipse Dimensions
Major Axis: x-axis
Minor Axis: y-axis
Define height ( 0, 0, z ) at Center
Rise, z =
Define first endpoint of Chord
( x1 > x2 )  x1 =
Define second endpoint of Chord
( x2 < x1 )  x2 =

HIP #1 Data
( 0, 0, z ) - ( x1, y1, 0 )
x1 =
y1 =
Hip 1 Run =
Hip 1 Length =
wrt to x-axis Deck θ =
Hip 1 Pitch θ =
Hip 1 Deck θ =
Hip 1 Backing θ =
Hip 1 Roof Plane θ =
HIP #2 Data
( 0, 0, z ) - ( x2, y2, 0 )
x2 =
y2 =
Hip 2 Run =
Hip 2 Length =
wrt to x-axis Deck θ =
Hip 2 Pitch θ =
Hip 2 Deck θ =
Hip 2 Backing θ =
Hip 2 Roof Plane θ =
Chord-Common Rafter Data
( x1, y1, 0 ) - ( x2, y2, 0 )
x1 =
y1 =
x2 =
y2 =
Δx: x1 - x2 =
Δy: y1 - y2 =
Chord Length =
Common Pitch θ =
at (0, 0, 0) Deck θ =
at peak Roof Plane θ =
Joe Bartok


Elliptic Roof Calculator Entries
Elliptic Roof Calculator Entries


Elliptic Roof Calculator Images

Cartesian Equation Data
x coefficient =
y coefficient =
Constant =
Feet to Inch - Frac. Inch
Select Denominator Value
Click on Dimension Field at left
Fraction :
Length :


Inches :

Angle to Rise / Run
Select Denominator Value
Click on Angle Field at left

Scope: 0° < θ < 90°
Fraction :
Degrees :
Over ? :

Inches :



Joe Bartok
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