Polygon Area from Coordinates
Enter 3–100 ordered vertices, one x,y pair per line. The last edge closes automatically; an optional repeated first point is accepted. Coordinates must be within ±1,000,000. Cartesian units only, not latitude/longitude.
A QUICK WALKTHROUGH
How to use this tool
- Enter 3–100 ordered vertices, one x,y pair per line. The last edge closes automatically; an optional repeated first point is accepted. Coordinates must be within ±1,000,000. Cartesian units only, not latitude/longitude.
- Calculate polygon
How is area calculated?
The shoelace formula gives signed area; its absolute value is reported. The centroid assumes uniform area density. Winding uses a Cartesian y axis pointing upward.
GOOD TO KNOW
Common questions
How is area calculated?
The shoelace formula gives signed area; its absolute value is reported. The centroid assumes uniform area density. Winding uses a Cartesian y axis pointing upward.