Calculate the area of an ellipse from semi-major and semi-minor axes, full width and height, or known area. Estimate square feet, square inches, square yards, square meters, circumference, waste, material quantity, and project cost.
Semi-axes mode:
The calculator multiplies the semi-major axis by the semi-minor axis, then multiplies by pi.
Full width and height mode:
The calculator divides the full width and full height by 2 to get the semi-axes, then calculates area.
Diameter mode:
The calculator treats the major and minor diameters as the full outside measurements of the ellipse.
Known area mode:
The calculator converts a known area and estimates the semi-axes using your axis ratio.
An ellipse area calculator helps estimate oval spaces for patios, pools, garden beds, lawns, concrete pads, landscape beds, design patterns, and construction planning.
It can help calculate square footage, compare area units, estimate material quantity, add extra waste, and estimate project cost.
Your result shows the ellipse area, semi-major axis, semi-minor axis, full major diameter, full minor diameter, circumference estimate, area with extra waste, estimated pieces or units needed, and estimated cost.
Multiply the semi-major axis by the semi-minor axis, then multiply by pi. The formula is Area = π × a × b.
The semi-major axis is half of the longest width of the ellipse.
The semi-minor axis is half of the shortest width of the ellipse.
Divide the full width by 2 and the full height by 2. Then multiply those two semi-axis values by pi.
Yes. Oval layouts often create cuts and offcuts. For pavers, sod, landscaping fabric, tile, concrete, mulch fabric, or flooring, adding 5% to 15% extra is commonly helpful.