Convert meters to kilometers

Enter value below to convert meter [m] to kilometer [km], or vice versa.

meter

kilometer

meter information

Definition

The meter is the standard unit of measuring length in the International System of Units (SI). Its symbol is “m” and it is one of the seven base units of the SI system.

History

The meter is a unit of length in the metric system, and it is the base unit of length in the International System of Units (SI). The concept of a standard unit of length dates back to ancient times, when rulers were used to measure distances. In the 1790s, the French Academy of Sciences proposed a new system of units based on the principles of nature, and in 1799, the French National Convention adopted the meter as the base unit of length in the new system.

The original definition of the meter was based on a physical artifact, a platinum-iridium bar that was kept at the International Bureau of Weights and Measures in Paris. This bar was intended to serve as a standard reference for the measurement of length. In 1960, the meter was redefined in terms of the speed of light, which is a fundamental constant of nature. This definition is still in use today.

Over the years, the meter has undergone several changes in definition and standardization. In 1889, the first International Prototype Meter was created, which was a platinum-iridium bar that was nearly identical to the original standard meter. In 1927, the International Prototype Meter was replaced by the International Prototype Kilogram, which was a platinum-iridium cylinder. In 1960, the meter was redefined in terms of the speed of light, and in 1983, the meter was redefined again as the distance traveled by light in a vacuum in 1/299,792,458 of a second. This definition is the basis of the meter as it is known today.

kilometer information

Definition

A kilometer (km) is a unit of length that is equal to 1,000 meters. It is commonly used to measure distances, especially in road signs and maps. For example, if you see a road sign that says "50 km/h," it means that the speed limit on that road is 50 kilometers per hour. Abbreviation: km

History

The kilometer is a unit of length in the metric system, and it was first introduced in 1799. It was originally defined as the distance traveled by light in a vacuum in one second, but this definition was later revised to be based on the distance traveled by light in a vacuum during a specific fraction of the second. The current definition of the kilometer is based on the distance that the Earth's equator circumference would have if it were a perfect circle with a radius of 6371.0072 kilometers.