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Convert Surface Measures

Convert an area from one surface measure to another


Enter the area below that you want to convert:

Conversion of Surface Measures

Converting surface measures is an essential skill in many fields, including mathematics, science, construction, agriculture, and even in everyday life. Whether you want to buy a piece of land, paint a room, or analyze scientific data, understanding surface measures and how to convert them is crucial.

What are surface measures?

Surface measures are measurements used to indicate the size of a two-dimensional area or surface. This could be the surface of a piece of land, the floor area of a room, or even the surface area of a cell in biological research.

Commonly Used Surface Measures

There are various units for measuring area, depending on the measurement system and application. Some of the most common units include:

  • Square meter (m²): This is the standard unit for area in the metric system. It represents a square that measures one meter on each side.
  • Hectare (ha): Often used in agriculture, 1 hectare is equal to 10,000 m².
  • Are (a): 1 are is equal to 100 m².
  • Centiare (ca): 1 centiare is equal to 1 m².
  • Square kilometer (km²): Often used to describe large areas, such as cities or countries. 1 km² is equal to 1,000,000 m².
  • Square foot (ft²): Used in the Anglo-Saxon measurement system, especially in the United States.
  • Acre: Also used in the Anglo-Saxon system, especially for agricultural land.
  • Square mile (mi²): Used to describe very large areas in the Anglo-Saxon system.

How to Convert Surface Measures?

Converting between different surface measures requires knowledge of the conversion factors between the units. For example:

1 m² = 10,000 ca
1 ha = 10,000 m²
1 km² = 1,000,000 m²
1 ft² ≈ 0.0929 m²
1 acre ≈ 4,047 m²
1 mi² ≈ 2.59 km²

To convert a value from one unit to another, multiply the original value by the conversion factor. For example, to convert 5 hectares to square meters: 5 ha x 10,000 = 50,000 m².

Importance of Accuracy

When converting surface measures, it's essential to be accurate, especially in professional contexts such as construction, agriculture, or scientific research. A small error in the calculation can lead to significant consequences, such as buying too little material or overestimating the size of a piece of land.


Understanding surface measures and the ability to convert them correctly is a valuable skill in many aspects of life and professional work. By becoming familiar with the different units and their relationships, you can make accurate calculations and make informed decisions in various situations.

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