How to use this calculator
Enter a value in either the acres field or the square feet field and the converter will instantly calculate the other direction. You can also type a value in hectares, square meters, or square yards and all the other units will update in real time.
The results include visual comparisons to help you picture the size of the land. For example, one acre is roughly the size of a football field without the end zones. The converter also shows a table of common residential lot sizes so you can quickly see where your parcel falls in the range from a small city lot to a multi acre rural property.
Use this tool when comparing real estate listings, estimating fencing or landscaping needs, or converting international property measurements. If a listing quotes lot size in square meters or hectares, simply enter that number and the calculator will show the equivalent in acres and square feet.
Common land area units and when to use them
Acres and square feet are the most common land measurements in the United States, but different situations call for different units. Square feet work best for small areas like house footprints, patios, and garden beds. Acres are more practical for larger parcels like residential lots, farms, and undeveloped land.
Outside the United States, most countries use the metric system. Hectares are the standard unit for agricultural land and large properties, while square meters are used for building footprints and smaller plots. One hectare equals 10,000 square meters, which is approximately 2.47 acres. Knowing these conversions is essential when browsing international real estate or reading global land use data.
Frequently Asked Questions
How many square feet are in an acre?
There are exactly 43,560 square feet in one acre. This number comes from the historical definition of an acre as a strip of land 1 furlong (660 feet) long and 1 chain (66 feet) wide. Multiplying 660 by 66 gives 43,560.
How big is a half acre?
A half acre is 21,780 square feet. If shaped as a perfect square, it would measure about 147.6 feet on each side. This is a common suburban lot size that gives you a house with a comfortable yard, garden space, and some distance from neighbors.
What is the difference between a hectare and an acre?
A hectare is a metric unit equal to 10,000 square meters, which is about 2.471 acres. An acre is an imperial unit equal to 43,560 square feet, which is about 0.405 hectares. Hectares are the standard land measurement used internationally, while acres are common in the United States, United Kingdom, and Canada.
How do you measure the acreage of irregular land?
For irregular parcels, the most accurate approach is a professional land survey. For rough estimates, divide the land into approximate rectangles and triangles, calculate each area in square feet, add them up, and divide by 43,560. GPS mapping apps and satellite imagery tools can also trace property boundaries and estimate total acreage.