Science · Scholarship · Literature · AD 973–1048

Al-Biruni — Age, Birthday & Biography

Born: 4 September AD 973 · Died: 9 December 1048 · Age at death: 75

How old was Al-Biruni when he died?

Al-Biruni died aged 75. He was born on 4 September AD 973 and died on 9 December 1048.

Persian polymath of the Islamic Golden Age who calculated the Earth's radius and wrote a pioneering study of India

Did you know?He accurately calculated the Earth's radius by using a mountain in modern-day Pakistan, centuries before such precision was common in the West.

Quick facts

  • Date of birth4 September AD 973
  • Date of death9 December 1048
  • Age at death75
  • NationalityPersian
  • BirthplaceKath, Uzbekistan
  • Occupationphilosopher, chemist, geographer

Editor's Take:

Al-Biruni was one of the greatest scholars of the Islamic Golden Age. Born in Khwarazm in Central Asia, he wrote on astronomy, mathematics, geography, medicine and history. Using a mountain and simple trigonometry, he estimated the radius of the Earth with remarkable accuracy. He travelled to India with the armies of Mahmud of Ghazni. There he learned Sanskrit and wrote a detailed, respectful study of Indian religion and science. He wrote more than 100 works. He is often called the first anthropologist.

Abu Reyhan Muhammad ibn Ahmad al-Biruni (Persian: ابوریحان محمد بن احمد بیرونی, romanized: Abū-Reyhān Bīrūnī; Arabic: أبو الريحان محمد بن أحمد البيروني; c. 973 – c. 1050), known as Biruni (بیرونی), was a Khwarazmian polymath of the Islamic Golden Age.

Text from Wikipedia, licensed under CC BY-SA 4.0

Profile

Al-Biruni: The Great Scholar of Khwarazm

Persian scholar, 973–c. 1050

Al-Biruni was born in Kath, Khwarazm, in 973.

He served at the court of Mahmud of Ghazni.

He wrote a great study of India around 1030.

He estimated the Earth's radius with great accuracy.

Career highlights

  1. 1000Chronology: of nations
  2. 1017Ghazni: court
  3. 1025Earth's radius: measured
  4. 1030India: book
  5. 1031Mas'udic Canon: astronomy

Did you know?He learned Sanskrit to study Indian science.

Age at death
75
Years since death
977

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Questions people ask

Frequently asked questions

When is Al-Biruni's birthday?
Al-Biruni's birthday is September 4. He was born on September 4, AD 973 in Kath, Uzbekistan.
How old was Al-Biruni when he died?
Al-Biruni died on December 9, 1048, aged 75.
Who shares a birthday with Al-Biruni?
Famous people who share Al-Biruni's September 4 birthday include Beyoncé, Anton Bruckner, François-Auguste-René de Chateaubriand, Antonin Artaud and Giorgi Marghvilashvili.

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Reviewed by the Who Shares My Birthday editorial team.

Last reviewed: October 2026