Follow the default numbers.
With the example inputs shown above, the model gives land area: 0.69 acres.
The formula is area depends on the selected parcel shape. Open the breakdown to trace expenses and assumptions. Change one input at a time to see how your decision changes. This example uses scenario inputs; it is not an offer, tax bill, appraisal or legal determination.
Pick the geometric model
Rectangle area is length times width. Triangle area is half the base times perpendicular height. Trapezoid area uses the average of two parallel bases times the perpendicular distance between them. Opposite nonparallel sides alone do not define a trapezoid. The model must fit the parcel’s actual shape for the arithmetic to mean anything.
Irregular lots need a polygon
A parcel with bends, curved frontage or an unusual angle cannot be accurately measured by multiplying two boundary lengths. Use the acreage map or coordinate mode to trace all corners, and check deed or survey information when available. The reported area is an estimate and does not resolve boundary location, access or setbacks.
Area and perimeter are different
The same acreage can have very different frontage and boundary length. Rectangle mode shows a perimeter; triangle base and height alone do not establish all side lengths, so no exact triangular perimeter is claimed. Use parcel geometry rather than acreage alone when evaluating fencing, frontage requirements or subdivision plans.
Keep your assumptions with the result
Save the calculation to your deal file to reuse compatible inputs in another tool. The file stays in this browser on this device. Download the CSV to open the complete inputs, results and schedule in Excel or Google Sheets. Use PDF to print the report or save it as a PDF. A share link includes entered financial figures in its URL, so use it only with people you intend to share those numbers with.