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.
Cubic Centimeter (cm³ or cc)
A cubic centimeter (cm³/cc) is a metric volume unit equivalent to one milliliter. Established with the metric system in the 1700s, it is frequently employed in scientific, engineering, and medical settings to measure small quantities accurately. The abbreviation “cc” is particularly prevalent in medical prescriptions for liquids and in the automotive field for specifying engine size. Since it matches the volume of a milliliter, the cubic centimeter is easily compatible with the rest of the metric system while remaining important in specialized applications.