Stonehenge Age Calculator
Calculate the exact age of the iconic Stonehenge monument based on its construction phases. Discover how many years, centuries, and generations ago it was built.
Monument Details
Select the construction phase and reference year to calculate the age
Enter the year you want to calculate the age from (defaults to current year).
Stonehenge was built in stages. Select which phase of construction you want to calculate the age for.
Calculation Results
Age breakdown and historical context
Select a construction phase and click Calculate Monument Age to reveal exactly how many years ago that phase of Stonehenge was completed.
Stonehenge Construction Timeline
A chronological breakdown of the major building phases of Stonehenge, spanning over a millennium of Neolithic engineering.
| Phase | Approx. Date | Age (as of 2026) | Key Features |
|---|---|---|---|
| Phase 1 | 3000 BC | 5,026 years | Circular earthwork enclosure, Aubrey holes, early cremation burials. |
| Phase 2 | 2900 BC | 4,926 years | Wooden posts, expansion of the monument, arrival of bluestones. |
| Phase 3 | 2500 BC | 4,526 years | Erection of the massive sarsen stone circle and trilithons. |
| Phase 4 | 1600 BC | 3,626 years | Final rearrangement of bluestones into current horseshoe/circle patterns. |
Stonehenge History FAQ
Everything you need to know about the age, construction, and purpose of the world’s most famous prehistoric monument.
The age of Stonehenge depends on which phase of construction you are referring to. The earliest earthworks and burial mounds were built around 3000 BC, making them over 5,000 years old. The iconic massive sarsen stone circle was erected later, around 2500 BC, making it approximately 4,500 years old as of the 21st century.
Stonehenge was built by Neolithic people, specifically the descendants of early farming communities that migrated to Britain from continental Europe. They were not the Druids, as was once popularly believed, but rather sophisticated agricultural societies capable of complex engineering and astronomical observation.
While its exact purpose remains a subject of debate, archaeologists believe Stonehenge served multiple purposes. It is widely accepted as a Neolithic burial site, an astronomical observatory aligned with the solstices, and a ceremonial gathering place or a site of healing.
Stonehenge was not built all at once. It was constructed in several stages over a period of roughly 1,500 years. The earliest earthworks date to 3000 BC, while the final modifications and rearrangements of the bluestones occurred around 1600 BC.
The oldest part of the monument is the circular earthwork enclosure, consisting of a bank and ditch, along with the Aubrey holes (pits that likely held wooden posts or stones). Radiocarbon dating places the construction of this first phase at approximately 3000 BC.