Geological Time Calculator

Enter an age in millions of years (Ma) to identify the geological era, period, epoch, and major events from that time.

Geological Period
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Eon
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Epoch
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% of Earth History
0%
Years Ago
0
Major Event
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Life on Earth
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Geological Time Scale

Earth is approximately 4,600 million years (4.6 billion years) old. The geological time scale divides this vast span into eons, eras, periods, and epochs based on major geological and biological events recorded in the rock record.

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