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How to Draw an Oval - Oval Layout Calculator

Mark out Major axis A-B, and Minor axis D-E Mark and insert pins at P1 and P2,  from C   on either side Insert pin at E Tie string firmly around these 3 pins Remove pin at E, insert pencil inside string loop and with string pulled taut, rotate pencil to draw the oval.
Major A-B
Minor D-E set
 
 
  


This oval, with major axis  and minor axis has an area of  ft²

C to P1 and P2 =
String Length =

Minor Axis




Major Axis
Minor Axis
Increments
How to Lay Out a Large Ellipse

If your Ellipse is too big to mark out with pins, chord and marker, mark Major and Minor Axes and use this calculator to mark out incremental distances from the center along the Major Axis, to form the 4 curved segments of the oval.

Measure at scale Left click, release and drag to measure scale inside diagram.
Minor Axis
Increments


Minor:
Mark-out
Major:
Mark-out






Slider Controls 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
Print all diagrams on current page

Use your iPad or Android Tablet On-Site 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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ALWAYS CHECK WITH YOUR LOCAL BUILDING AUTHORITY BEFORE LAYING OUT OR BUILDING ANYTHING
AND FOLLOW ALL LOCAL CODES. VERIFY ALL DIMENSIONS AND ANGLES BEFORE CONSTRUCTION


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