Lot Size Calculator: Find Your Lot Size Free
Outline your property on the satellite map below to get its lot size in square feet and acres — no survey, no deed, no sign-up. For reference: a quarter-acre lot is 10,890 sq ft, and one acre of land is 43,560 sq ft.
Three free ways to find your property's lot size
- Measure it on the satellite map (fastest). Search the home's address above, then tap a corner at each bend of the parcel — follow fence lines, hedges, and driveway edges visible in the imagery. The lot's square footage and acreage update live, and you can drag any corner to refine it.
- County assessor or GIS website (official record). Every county publishes parcel records with the recorded lot size, usually searchable by address. This is the figure listings and property-tax bills are based on — a good cross-check against what you measure.
- The plat map on your deed (surveyed dimensions). Your closing documents include a plat showing each side of the lot in feet. Multiply the dimensions out for a rectangular lot, or trace the plat's shape on the map tool for an irregular one.
Measuring off satellite imagery is a planning-grade estimate — typically within 1–2% on a clearly visible home lot — not a legal survey. If you're building near a boundary or settling a dispute, see how to find your property lines and hire a licensed surveyor.
Convert lot size to acres
Divide square feet by 43,560 to get acres — or type your lot's square footage here and read the acreage instantly.
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Common lot sizes in acres
| Lot size (sq ft) | Acres | Typical property |
|---|---|---|
| 5,000 | 0.11 | Compact city or infill lot |
| 7,500 | 0.17 | Typical older-neighborhood home lot |
| 10,000 | 0.23 | Standard suburban lot |
| 21,780 | 0.50 | Half-acre lot |
| 43,560 | 1 | Exactly one acre of land |
Fractional-acre lots in feet
What the common fractional-acre home lots measure, with a realistic width × depth for each — actual lot shapes vary by neighborhood.
| Lot | Square feet | Example dimensions (ft) |
|---|---|---|
| 1/8 acre | 5,445 | 50 × 109 |
| 1/4 acre | 10,890 | 80 × 136 |
| 1/3 acre | 14,520 | 100 × 145 |
| 1/2 acre | 21,780 | 100 × 218 |
| 1 acre | 43,560 | 150 × 290 |
Lot size vs. house square footage
Real-estate listings show two different areas, and it's easy to mix them up. The lot size is the land — the whole parcel from property line to property line, including the yard, driveway, and everything under the house. The square footageof the home is interior finished living space only. When a listing says "0.25 acre lot," that's 10,890 sq ft of land, regardless of the size of the house on it.
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Frequently asked questions
- How do I find my lot size for free?
- Three free methods work for almost any home or land parcel. Fastest: outline your property on the satellite map on this page and read the square footage and acreage instantly. Official: look up your parcel on the county assessor or county GIS website, which lists the recorded lot size. Paper trail: the plat map attached to your deed shows the surveyed lot dimensions, which you can multiply out or verify against the map tool.
- How do I convert lot size to acres?
- Divide the lot's square footage by 43,560. A 10,890 sq ft lot is exactly a quarter acre, and a 21,780 sq ft lot is exactly half an acre. The converter on this page does it instantly in either direction, and the map tool reports both units at once as you outline the property.
- What size is a 1/4 acre lot in feet?
- A quarter-acre lot is 10,890 square feet. Most real quarter-acre home lots are rectangles around 80 × 136 ft; a perfectly square one would be about 104 × 104 ft. Lot shape varies a lot between neighborhoods, so outline yours on the satellite map for the actual dimensions.
- Is lot size the same as the square footage of my house?
- No — they measure completely different things, even though listings show both. Lot size is the area of the land parcel the home sits on, usually given in square feet or acres. The house's square footage is its interior finished living area. A 2,000 sq ft home on a 10,000 sq ft lot is a typical suburban arrangement.