Lot Size Calculator
Calculate rectangular property lot area in square feet and acres.
How to Use the Lot Size Calculator
Enter the lot dimensions to calculate total property area for planning, comparison or conversion.
Practical Example
A rectangular lot measuring 100 feet by 150 feet covers 15,000 square feet.
Factors That Affect the Result
Irregular boundaries, easements, setbacks and survey measurements can affect usable land area even when the total lot area is known.
Frequently Asked Questions
Can I use this for irregular lots?
For irregular shapes, split the lot into simpler sections and add the areas.
Does lot size equal buildable area?
No. Local rules and setbacks can reduce buildable area.
Can I convert the result to acres?
Yes, use the related acreage or square-feet-to-acres tools.
Related Tools
Understanding Lot Size
Lot size describes the land area inside the parcel boundaries. A rectangular lot can be estimated with length × width, while irregular parcels should be divided into simpler shapes or taken from a survey.
Do not confuse lot area with building footprint, usable yard or developable area. Setbacks, easements, slopes and zoning restrictions can reduce the portion that can actually be used. For real-estate or construction decisions, compare the calculator estimate with official parcel records and professional measurements.