Understand
the scale.
Use a known acreage figure, measured dimensions or a scaled sketch. These are planning estimates, not surveyed boundaries. A sketch is not a map and does not retrieve parcel lines.
One acre.
43,560 square feet.
Acreage describes area, not a property’s shape, frontage or usable space. Two parcels with equal acreage may have very different layouts and development constraints.
Price per acre is asking price divided by total acres. It is a comparison metric, not an appraisal or an estimate of market value.
NIST unit conversion reference ↗Use the correct dimensions
For a triangle, height must be perpendicular to the base. For an irregular parcel, a bounding rectangle can substantially overstate its actual area. Use a survey for property boundaries and legal acreage.
These tools use the international foot: one foot equals 0.3048 meters. Older surveys may use different surveying conventions.
Sketch a shape.
Estimate its area.
Set the grid scale, then click or tap parcel corners in order. The drawing closes automatically for area calculation after three points. This is a flat, scaled diagram; it has no aerial imagery or GPS accuracy.
For keyboard use, enter coordinates in feet below: one x,y pair per line. Coordinates are relative to an arbitrary origin.
Self-crossing shapes cannot produce a reliable parcel estimate. Boundaries must be a simple polygon.