Square Yard [yd2] to Square Kilometer [km2] Converter

Definition: A square yard (yd²) is a unit of area equal to the area of a square that is 1 yard on each side. It is commonly used in the United States and other countries that use the imperial system.

History/origin: The square yard is derived from the yard, which historically was linked to the length of a person's arm or stride. Its definition has evolved over time.

Current use: Square yards are used to measure moderate-sized areas, such as the area of rooms, gardens, or carpets. It's a common unit in construction, landscaping, and interior design in the US.

Definition: A square kilometer (km²) is a unit of area equal to a square that is 1 kilometer on each side. It is a multiple of the square meter, the SI unit of area.

History/origin: The square kilometer is derived from the kilometer, which is part of the metric system established in France in the late 18th century. The metric system was designed to be a standardized and coherent system of measurement based on decimal multiples.

Current use: Square kilometers are used to measure large areas, such as the size of cities, countries, lakes, and other geographical features. It's a common unit in geography, cartography, and environmental studies.