neliöjalkaa

Neliöjalkaa, or square foot, is a unit of area used in the imperial system. It denotes the area of a square with sides that are one foot long. One square foot equals 0.09290304 square meters, and the symbol commonly used is ft². The length of a foot is defined as exactly 0.3048 meters, a standard adopted in 1959 to align the international foot across measuring systems.

In practice, neliöjalkaa is still used in contexts where feet are the familiar unit, notably in the United States for real estate, construction, and interior design. It is less common in Finland and in most European countries, where square meters and the metric system are standard. When Finnish sources reference area for international audiences, they typically convert to square meters.

Conversion basics are straightforward: to convert square feet to square meters, multiply by 0.09290304; to convert square meters to square feet, multiply by 10.7639104. For example, a room measuring 12 feet by 12 feet has an area of 144 ft², which is about 13.38 m².

See also terms related to area measurement and unit systems, such as the square meter and the broader metric system.