Stephen Hawking age at death and confirmed timeline
Stephen Hawking was 76 years old when he died on 14 March 2018. He was born on 8 January 1942 in Oxford, England, and died at his home in Cambridge. This status clarifier summarizes his age at death, key biographical dates, and major milestones in his scientific life. All dates and ages are drawn from verified biographical records and widely cited public sources.
Confirmed biographical dates and age milestones
| Date or Period | Event | Why It Matters |
|---|---|---|
| 8 January 1942 | Born in Oxford, England | Establishes birth date for age calculations |
| 29 August 1963 | Diagnosed with ALS (age 21) | Marked early stage of his condition; prognosis initially limited |
| 14 March 2018 | Died in Cambridge, United Kingdom | Date of death; confirms he was 76 years old |
| 1974 | Hawking radiation theory published | Seminal contribution linking quantum mechanics, thermodynamics, and black holes |
| 1988 | A Brief History of Time published | Major science communication milestone; made cosmology accessible to broad audiences |
Age context and common points of confusion
When people ask Stephen Hawking age, they are often referring to his age at death (76) or his age at key events. He turned 76 in January 2018 and died in March of that year. Because he was born in 1942 and died in 2018, some retrospective calculations may vary by a day depending on whether the birth and death dates are compared with or without inclusive counting. The widely accepted age at death is 76 years.
Major career milestones and enduring influence
Hawking's influence extends far beyond a single number. His work on black hole thermodynamics and Hawking radiation reshaped theoretical physics. Collaborations with researchers such as Roger Penrose on singularity theorems strengthened the mathematical foundations of cosmology. His ability to communicate complex ideas in A Brief History of Time and numerous public appearances brought science to millions. These achievements remain central to how he is remembered, regardless of how his age is measured.
Health, technology, and daily life context
Diagnosed at age 21 with a prognosis of only a few years, Hawking lived for more than five decades with motor neuron disease. He used a wheelchair and relied on a speech-generating device, yet continued research, teaching, and public engagement. His longevity highlighted advances in medical care and assistive technology, and his persistence influenced perceptions of living with disability in science.
Common questions about Stephen Hawking age and legacy
- At what age did Stephen Hawking die? He was 76 years old at the time of his death on 14 March 2018.
- When was he born? He was born on 8 January 1942.
- How old was he when diagnosed with ALS? He was 21 at diagnosis in 1963.
- What is his age used to measure? His age frames timelines for scientific achievements, disability advocacy, and science communication, rather than indicating ongoing status.
Why precise age matters in scientific biography
Stating Stephen Hawking age accurately supports reliable biography, education, and historical record. Exact dates allow researchers to align timelines, compare careers, and contextualize achievements. Public interest in his longevity underscores broader conversations about science, health, and accessibility. By grounding age references in verified records, discussions of his life and work remain clear, consistent, and trustworthy.