Convert barn to square kilometer
Please provide values below to convert barn [b] to square kilometer [km^2], or Convert square kilometer to barn.
How to Convert Barn to Square Kilometer
1 b = 1e-34 km^2
Example: convert 15 b to km^2:
15 b = 15 × 1e-34 km^2 = 1.5e-33 km^2
Barn to Square Kilometer Conversion Table
| barn | square kilometer |
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Barn
A barn is a unit of area used primarily in agriculture to measure land, especially for farming purposes.
History/Origin
The barn originated as a unit of measure in the 19th century, based on the amount of land that could be covered by a barn, roughly equivalent to 40 square rods or about 40 acres, and was used in land surveying and farming contexts.
Current Use
Today, the barn is largely obsolete as a formal measurement unit but is still used colloquially in agriculture to refer to land area, especially in the United States, often informally approximating 40 acres.
Square Kilometer
A square kilometer is a unit of area equal to the area of a square with sides measuring one kilometer each.
History/Origin
The square kilometer has been used as a standard unit of area measurement in the metric system since its adoption, primarily for measuring large land areas such as countries and regions.
Current Use
It is commonly used in geography, urban planning, and environmental studies to quantify land and area sizes, especially in contexts requiring large-scale measurements.