Sir Fred's nephew Alex Carpenter said his uncle passed away peacefully this morning at the Maygrove Retirement Village Hospital in Orewa.
"He was very comfortable at the end."
Carpenter said his uncle, who was made a Knight Companion of the New Zealand Order of Merit in the Queen's Birthday Honours List for services to rugby in 2010, had spent "quality time" with his family in the weeks leading up to his death.
Sir Fred had previously been awarded an OBE in 1990.
Carpenter said his uncle had been active and happy in the time leading up to his death, despite being in and out of hospital for ongoing health problems in the last six months.
"He attended and spoke at the Anzac day memorial service at the Maygrove Village."
Carpenter said Sir Fred's daughter and two grandchildren were due to arrive in Auckland this afternoon for the funeral.
Sir Fred served as as a lieutenant in the 27th and 30th Battalions during World War II, settling in Auckland upon his return.
He played for Auckland and the All Blacks from 1946 to 1949, playing 21 games in the black jersey including 6 tests and all as captain.
But it is as an All Black coach that "The Needle" will be most remembered, winning all 14 tests during his reign from 1966 to 1969.
The New Zealand Rugby Football Union awarded him the Steinlager Salver in 2002, and in 2005 he was inducted into the International Rugby Hall of Fame.
Sir Fred's wife Norma passed away in September 2009, and his only regret in accepting the Knight Companion of the New Zealand Order of Merit was that she was not there to share it with him.
At the time of his award, John Key said: "This honour gives the people you have touched the chance to show their appreciation for your hard work, your dedication and your achievements.
"It also gives the New Zealand public the opportunity to recognise your efforts.
"On behalf of the government, my parliamentary colleagues and all New Zealanders, thank you."
Labour Leader David Shearer has paid tribute saying he was sorry to hear Sir Fred had passed away, and described the World War II veteran as a "real Kiwi hero".
Mr Shearer said the string of wins Sir Fred achieved during his time as All Black coach was "a remarkable achievement".
Sir Frederick Richard Allen, KNZM, OBE was born in Oamaru and educated in Christchurch.
- Teuila Fuatai of APNZ
