 Eklund became a member of the Swedish National Commission for Physics ("Svenska nationalkommissionen för fysik") in 1947 and a member of the Royal Swedish Academy of Engineering Sciences in 1953.He became an honorary doctor in Graz in 1968, in Kraków 1971 and in Bucharest in 1971.Eklund became a member of the Royal Swedish Academy of Sciences in 1972 and honorary doctor of technology at Chalmers University of Technology in 1974 and at the Columbia University in 1977.