Convert Earth's Equatorial Radius (R⊕) to Reed (reed) instantly.
About these units
Earth's Equatorial Radius (R⊕)
The Earth's equatorial radius is approximately 6,378.1 km. This distance represents the radius measured along the equator, where Earth's rotational bulge makes it slightly larger than the polar radius. Geodesists, cartographers, and astronomers use the equatorial radius for mapping, satellite positioning, and calculating gravitational effects. It is fundamental to defining the shape of the Earth as an oblate spheroid rather than a perfect sphere. Precise knowledge of R⊕ enables accurate navigation, climate modeling, and orbital calculations, forming the basis for modern geodesy and Earth observation systems.
Reed (reed)
The reed is a smaller unit than the long reed, typically about 1 cubit, and was widely used in Mesopotamia, Egypt, and biblical times. It functioned as a standard measure for construction, religious architecture, and land surveys. Reeds were particularly useful in field work, where repetitive human-scale measurements could be performed quickly. They also served as a practical calibration tool for larger units like rods, chains, and long reeds. The reed is frequently mentioned in ancient texts, highlighting its role in the organization of public works, the construction of sacred buildings, and the measurement of land.