Lot Size Calculator

Calculate lot size in square feet, acres, square yards, square meters, hectares, and square miles. Estimate frontage, depth, perimeter, buildable area, setbacks, lot coverage, land value, and property size for residential lots, parcels, building sites, yards, and land planning.

Calculate Lot Size

Lot Size = Frontage × Depth.
Your result will appear here.

How the lot size calculator works

Frontage × depth:
The calculator multiplies lot frontage by lot depth to estimate lot size in square feet and acres.

Length × width:
Use this mode when you know the full length and width of a rectangular lot.

Irregular lot estimate:
Enter front width, rear width, left depth, and right depth to estimate lot size using average width and average depth.

Known lot area conversion:
Enter a known lot size to convert it into square feet, acres, square yards, square meters, and hectares.

Why use a lot size calculator?

A lot size calculator helps estimate property size, land value, buildable area, lot coverage, and common land area conversions.

It can be useful for home lots, vacant land, subdivision planning, real estate listings, building sites, yard planning, zoning checks, landscaping, and property comparisons.

What your result means

Your result shows estimated lot size in square feet, acres, square yards, square meters, hectares, perimeter, buildable footprint area, setback-adjusted buildable area, maximum lot coverage, and estimated land value.

Lot size formulas

Frequently asked questions

How do you calculate lot size?

For a rectangular lot, multiply frontage by depth. For example, an 80 ft by 125 ft lot is 10,000 square feet.

How do you convert lot size to acres?

Divide the lot size in square feet by 43,560 to convert square feet to acres.

What is lot frontage?

Lot frontage is the width of a property along the road, street, or front property line.

Is buildable area the same as lot size?

No. Lot size is the full property area. Buildable area may be smaller because of setbacks, easements, zoning rules, lot coverage limits, slopes, wetlands, or utilities.