Birthday on Other Planets

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Earth years are only one way to count another trip around a star.

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About this tool

How it works

Each age divides elapsed Earth days by the planet's approximate orbital period. Results are educational approximations rather than astronomical event predictions.

Example

An Earth age of 30 is roughly 124.5 Mercury years but only about 2.5 Jupiter years.

Private by default

The calculation or transformation happens in this browser. There is no account, and the values you enter are not sent to Naughty Bear Labs.

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Open your browser menu and choose Install app or Add to Home screen.