Cubic Foot (ft³)
A cubic foot (ft³) is a unit of volume in the imperial and US customary systems, defined as the amount of space enclosed by a cube with one-foot sides. It originated in English-speaking regions where it became a standard for measuring materials and space, especially in construction and trade. Today, the cubic foot remains common in American industries such as real estate, heating and cooling (HVAC), and the measurement of natural gas. It is equal to about 28.316 liters, allowing for practical use in both domestic and industrial settings. Even though most of the world uses metric units, the cubic foot maintains its significance in various technical and commercial fields.
Cubic Inch (in³)
The cubic inch, symbol in³, is a US customary and imperial unit representing the volume of a cube with each side one inch in length. Its use dates back centuries in English measurement systems. Today, it is particularly significant in the automotive industry, where it historically defined engine displacement before metric liters became common. One cubic inch equals 16.387 milliliters, making it a small but practical unit for precision engineering, manufacturing, and certain niche applications.