Land Calculator

Whether you are buying farmland, planning a construction project, or settling a property boundary dispute, knowing the exact area of a land parcel is essential. Our free online Land Calculator gives you instant results in the units that matter – acres, hectares, square feet, and more. Just enter the dimensions of your plot to get accurate land measurements.

Rectangular Plot

Enter the length and width of your rectangular plot to calculate the total land area in all common measurement units.

Enter the plot length
Enter the plot width
Select the unit used for both length and width measurements.
Triangular Plot (Heron's Formula)

For irregularly shaped land, divide it into rectangles and triangles. Enter the three sides of a triangular section below to calculate its area.

First side
Second side
Third side
Select the unit used for all three side measurements.
Land Measurement Reference Table
UnitAbbreviationSquare Feet EquivalentSquare Meter Equivalent
Square Footsq ft10.0929
Square Meterm²10.76391
Square Yardsq yd90.8361
Acreac43,5604,046.86
Hectareha107,63910,000
Square Kilometerkm²10,763,9101,000,000
Square Milemi²27,878,4002,589,988

The calculator takes the length and width of a rectangular plot in your choice of feet, meters, yards, or other common units, then displays the area in all typical land measurement units simultaneously. For irregular shapes, you can split the land into smaller rectangles or triangles, calculate each part with the calculator, and sum the results manually.

What Is a Land Calculator?

A land calculator is a digital tool that computes the surface area of a plot of land from simple linear measurements. It automatically converts the computed area between the most common land measurement units – square feet, square meters, acres, hectares, square yards, and more. Real estate agents, farmers, surveyors, and homeowners use land calculators to avoid manual arithmetic errors and to instantly see a piece of property in familiar units.

Common Units of Land Measurement

Land is measured in several units around the world. Below are the standard units and their exact relationships, which the calculator uses internally.

UnitAbbreviationSquare Feet EquivalentSquare Meter Equivalent
Square Footsq ft10.0929
Square Meterm²10.76391
Square Yardsq yd90.8361
Acreac43,5604,046.86
Hectareha107,63910,000
Square Kilometerkm²10,763,9101,000,000
Square Milemi²27,878,4002,589,988

How to Calculate Land Area Manually

For a rectangular or square piece of land:

  1. Measure the length and width in the same unit (feet, meters, etc.).
  2. Multiply length × width to get the area in square units.
  3. Divide by the conversion factor to obtain acres, hectares, or any other unit.

Example: A plot is 100 feet long and 200 feet wide.
Area = 100 × 200 = 20,000 sq ft.
Acres = 20,000 ÷ 43,560 ≈ 0.459 acres.
Square meters = 20,000 × 0.0929 ≈ 1,858 m².
Hectares = 1,858 ÷ 10,000 = 0.1858 ha.

Irregularly Shaped Plots

When the land is not a simple rectangle, divide it into a combination of rectangles and triangles. For triangular sections:

  1. Measure the three sides – \(a\), \(b\), \(c\).
  2. Compute the semi-perimeter: \(s = (a+b+c)/2\).
  3. Apply Heron’s formula:
    \( \text{Area} = \sqrt{s(s-a)(s-b)(s-c)} \).

Example: A triangular corner has sides 50 ft, 60 ft, and 70 ft.
\(s = (50+60+70)/2 = 90\).
Area = \(\sqrt{90 \times 40 \times 30 \times 20} = \sqrt{2,160,000} \approx 1,469.7\) sq ft.
Acres = 1,469.7 ÷ 43,560 ≈ 0.0337 acres.

Add the areas of all rectangles and triangles to get the total land area.

Key Land Area Conversion Formulas

The calculator handles conversions automatically, but knowing the relationships can help when working offline.

  • Square feet to acres: divide by 43,560.
  • Square meters to acres: divide by 4,046.86.
  • Square feet to square meters: multiply by 0.0929.
  • Acres to hectares: multiply by 0.404686.
  • Hectares to acres: multiply by 2.47105.
  • Square feet to square yards: divide by 9.

Always verify critical land measurements with a professional surveyor. The calculator provides estimates for informational purposes only.

Frequently Asked Questions

What is the formula to calculate land area?
For a rectangular plot, multiply length by width in the same units. To find the area of an irregular shape, divide the land into smaller rectangles and triangles, calculate each segment’s area separately, then sum the results. This method works for any polygonal boundary.
How many square feet are in one acre?
One acre contains exactly 43,560 square feet. This fixed conversion factor is essential when comparing plot sizes listed in different measurement systems, especially for real estate transactions and farm land valuations.
What is a hectare vs. an acre?
A hectare equals 10,000 square meters (approximately 2.47105 acres). Hectares are the standard land unit in most countries outside the US and UK, while acres remain common in the United States, Canada, and the United Kingdom.
Can I use a land calculator for irregularly shaped plots?
Yes. Divide the irregular parcel into regular geometric figures such as rectangles, squares, and right triangles. Use the land calculator to find each component area, then add all the pieces together to get the total land area.
How do I convert square meters to square feet for land?
Multiply the area in square meters by 10.7639 to obtain square feet. For example, 500 m² × 10.7639 = 5,382 sq ft. The built‑in converter in the land calculator performs this and many other conversions instantly.
What unit is best for measuring large farmland?
Agricultural land is typically measured in acres (US) or hectares (international). Extremely large tracts may be expressed in square kilometers or square miles. A good land calculator will display all relevant units for easy comparison.
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