English: Relations between seven fundamental constants and the proposed new definitions of the seven base units of the SI. The arrows indicate the dependencies. Example: unit "metre" (m) is defined as distance passed by light in 1/299792458 second. Hence m depends on c (speed of light) and s (definition of unit "second"). This is indicated by arrows from s and c to m. Conversely, the definition of m is involved in the definitions of kg, K and cd - hence there are arrows from m to kg, K and cd.