Meters are equal to 6.5616798 ft (rounded to 8 digits) The fundamental unit of length in the metric system is the meter, or metre, on which all other length units are based. It is equivalent to 100 cm, one thousandth of a kilometer, or approximately 39.37 inches. A foot is a length unit equal to precisely 12 inches (0.3048 meters). A yard is 0.9344 meters, and a block is 10 yards (9.144 meters). A mile is 5,280 feet or 1.609344 kilometers. 2 meters is identical to 40 feet, or 12 meters. The word "meter" comes from the Greek metron, meaning "measurer". In science, technology, and industry, a meter is the distance between two points on the surface of Earth that are separated by exactly 10 miles. The meter was defined as the distance traveled by light in vacuum during 1/299,792,458 of a second. The meter was defined by the speed of light in a vacuum being measured by atomic clocks located near Paris and Vienna. Until then, the definition depended on the velocity of light in some transparent medium, such as air or water, which differs from that in vacuum due to the presence of electrons in atoms. At the time of its adoption, the meter was the most precise unit available for measuring length. It is still used in scientific laboratories around the world to measure extremely small distances and very high-speed movements.