Astronomical Unit Converter

Convert distances commonly used in astronomy and orbital mechanics. This tool uses precise IAU constants for AU, light‑year, parsec, and mean lunar distance.

From

Value

Result

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Constants used:

1 AU = 149,597,870,700 m (IAU 2012)
1 ly = 9.4607304725808e15 m
1 pc = 3.0856775814913673e16 m
1 LD (mean Earth–Moon distance) = 384,400,000 m

Open Source & Transparent

This tool is open source and the underlying logic is fully transparent. You can view the source code, understand the calculations, and even contribute improvements to make it better for everyone.

View Source Code