The controversy over the accuracy of such timing was the reason the international swimming rules were subsequently changed, and today swimming times are measured in hundredths of a second. During his career, Larsson set three world and eight European records. Together with Arne Borg he is considered as Sweden"s greatest swimmer of all time.
In 1979, he was inducted in the International Swimming Hall of Fame.
Larsson retired from competitive swimming in 1973 and until 1980 worked as a swimming coach. Later he took miscellaneous jobs, mostly with McDonald"s and the Swedish Swimming Federation (2000–2005).
He also did one year of acting in 2003. Between 1974 and 2004 he worked as part-time swimming commentator with radio stations.
His mother died in 1960 when he was only 9 years old.
They have three children: Lotten (b 1978), Emelie (b 1980) and Amanda (b 1989).