Calculate acreage from lot dimensions or square footage. Perimeter, fencing estimate, acre percentage bar, standard lot dimensions guide, and residential lot categories.
How many acres is your lot? This calculator converts lot dimensions (length × width) or known square footage into acres, hectares, and other area units. Unlike a simple area converter, it is designed specifically for residential and commercial property buyers and owners who need to understand their lot size in practical terms.
Enter your lot dimensions in feet, meters, or yards (or plug in square footage directly) and instantly see acreage, the fraction of an acre, perimeter, and an estimated fencing cost. The acre percentage bar shows at a glance how your lot compares to a full acre, and preset buttons cover common lot sizes from tiny urban parcels to multi-acre lots.
The standard lot dimensions table maps common land configurations to their acreage, and the residential lot size guide categorizes lots from tiny urban (2,000 ft²) through rural homestead (5+ acres). Real estate shoppers, homebuilders, landscapers, and fence installers all find this tool indispensable for translating raw dimensions into meaningful acreage.
Most people know their lot in feet or meters but not acres. This tool bridges that gap instantly and adds practical outputs: perimeter for fencing, percentage of an acre for comparison, and standard lot size categorization. It is the fastest way to answer "how big is my lot?" with confidence before buying, building, or budgeting.
Area (ft²) = length (ft) × width (ft) Acres = ft² ÷ 43,560 Perimeter (ft) = 2 × (length + width) Fencing estimate = perimeter × $25/ft (average)
Result: 7,200 ft² = 0.1653 acres (16.5% of an acre)
120 ft × 60 ft = 7,200 ft². Divide by 43,560: 7,200 ÷ 43,560 = 0.1653 acres. Perimeter: 2 × (120 + 60) = 360 ft. Fencing at $25/ft would cost about $9,000.
Lot size significantly impacts property value, but the relationship is not linear. In urban areas, land costs dominate — a 5,000 ft² lot may cost more than a 5-acre rural parcel. In suburban areas, lots above ¼ acre command premiums for privacy and space. Understanding your lot size in acres helps you compare listings and assess value accurately.
Most municipalities specify minimum lot sizes for residential construction. These typically range from 3,000 ft² in urban zones to 2+ acres in rural/agricultural zones. The lot-to-building ratio (lot coverage) limits how much of the lot you can build on — often 30-60% for residential. Knowing your acreage helps determine what you can build.
Beyond real estate, lot dimensions matter for landscaping (sod and seed quantities), irrigation system design, fencing (linear feet of perimeter), driveway planning, and drainage calculations. The perimeter is as important as the area for many practical projects.
Multiply length × width to get square feet, then divide by 43,560. For example: 100 ft × 150 ft = 15,000 ft² ÷ 43,560 = 0.34 acres.
43,560 ÷ 4 = 10,890 square feet. A quarter-acre square lot is about 104 × 104 feet.
It depends on location. Urban: 3,000-6,000 ft². Suburban: 7,000-15,000 ft² (⅙ to ⅓ acre). Rural: ½ acre to 5+ acres. Check local zoning for minimum lot size requirements.
Check your property deed, plat map, or county tax assessor records. You can also use Google Earth to measure approximate distances, or hire a surveyor for precise measurements.
The acreage calculation still works — you just need the total area in square feet from a survey. For irregular lots, a surveyor measures all boundary lines and calculates total area. Divide that by 43,560 for acres.
One acre has a perimeter of about 836 ft (if square). At $25/ft for wood fencing: ~$20,900. Chain link ($15/ft): ~$12,500. The perimeter varies with lot shape — long narrow lots have more perimeter than square lots of the same area.