Use this acreage calculator to calculate land area in acres from length and width. Quickly find acreage, measure a piece of land, and convert between square feet, meters, hectares, and more.
Formula: Acres = (Length × Width) ÷ 43,560 (for square feet)
Last updated: March 2026 | By Summa Calculator
An acre is a unit of land area used in the imperial and US customary systems. One acre is equal to 43,560 square feet, or approximately 4,047 square meters. The acre has been a standard unit for measuring land area in English-speaking countries for centuries.
Historically, an acre was defined as the amount of land a yoke of oxen could plow in one day. While this varied based on soil conditions and terrain, it was eventually standardized to 43,560 square feet. Today, acres remain the primary unit for measuring agricultural land, residential lots, and real estate properties in the United States and other countries using imperial measurements.
The acre is particularly useful because it represents a practical size for land parcels, neither too large nor too small for most property transactions. An acre can take many shapes: it could be a rectangle 66 feet by 660 feet (one furlong by one chain), a square approximately 208.7 feet on each side, or any other shape totaling 43,560 square feet.
Choose the measurement unit you'll use for length and width (square feet, meters, yards, etc.)
Input the length and width of your land parcel in the selected unit
The calculator instantly shows the total area in acres plus conversions to other common units
Calculate the acreage of a rectangular lot that is 300 feet by 500 feet:
One acre equals exactly 43,560 square feet. This standardized measurement has been used for centuries in land surveying and property transactions.
Multiply the length by the width to get the total area, then divide by 43,560 if the measurements are in feet to convert to acres.
An acre is slightly smaller than a football field (which is 1.32 acres including end zones). You can also visualize it as a square approximately 208.7 feet on each side, or about 90% of a soccer field.
This calculator works for rectangular plots. For irregular shapes, divide the area into rectangles or triangles, calculate each section separately, then add the results together.
An acre is an imperial unit (43,560 sq ft) while a hectare is metric (10,000 sq meters). One hectare equals approximately 2.471 acres. Hectares are used internationally, while acres are common in the US and UK.
This comes from old English measurements: one acre equals one furlong (660 feet) by one chain (66 feet). This rectangle was the standard amount of land a team of oxen could plow in one day.
No! An acre can be any shape, including circular, triangular, irregular, as long as the total area equals 43,560 square feet. The rectangle is just the most common shape for property boundaries.
A typical city block varies significantly by location. In many US cities, a standard city block is around 2-3 acres. New York City blocks are typically about 5 acres (200 ft × 900 ft).
Yes! One acre equals 4,046.86 square meters. The calculator automatically provides this conversion along with other common area units like square kilometers, hectares, and square yards.
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