Fernando Berckemeyer, 76, the ambassador of Peru to the United States from 1949 to 1963 and again from 1968 to 1975, died Friday in Lima, Peru, where he was visiting members of his family. He had a respiratory ailment.

Ambassador Berckemeyer, who had lived in San Francisco since 1975, was born in Lima. In 1923, he graduated from the University of Notre Dame in South Bend, Ind. He worked for a bank in New York and entered the Peruvian diplomatic service in 1925. His first foreign post was Washington.

In the course of his career, he was consul general in San Francisco, Seattle and New York City. In 1942, he was transferred to the Peruvian embassy in London, where he served as counselor and charge d'affaires until the end of World War II. He was the Peruvian minister to Sweden from 1946 to 1948 and ambassador to Britain from 1947 to 1948.

He then was appointed ambassador to the United States. He was a specialist in financial and economic affairs and served as his country's governor to the World Bank and the International Monetary Fund. He also attended numerous conferences organized by the United Nations.

From 1963 to 1968, Ambassador Berckemeyer was a businessman in San Francisco. He then returned here as ambassador. Since his retirement in 1975, he had been a consultant on economic and financial affairs to various Pervian government agencies and to banking institutions in Peru, the United States and Europe.

His first wife, the former Clarebel Rapp, died in 1971.

Survivors include his wife, Elizabeth, of San Francisco; an adopted son, Fernando, of Lima; a stepdaugher, Mrs. Howard Chickering of New York City; three brothers, Lose, Luis and Oscar Berckemeyer, and a sister, Maruja Alvarado, all of Lima, and one gradson.