parsec to light-year converter

Convert parsec to light-year in the Length family. See a sample calculation, unit definitions, and the interactive converter.

Example conversion: 1 pc

3.261563777 light-year

This example is calculated from the same unit registry used by the interactive converter.

Formula and unit definitions

Convert metric, imperial, nautical, microscopic, surveying and astronomical lengths.

target value = source value × source factor ÷ target factor

Source unit: parsec (pc), factor 3.085677581e+16, offset 0.

Target unit: light-year (ly), factor 9.460730473e+15, offset 0.

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Important note

The calculation is performed locally from the listed unit definitions. Display results are rounded for readability; high-precision and regulated work should use the governing standard and appropriate significant figures.

For high-precision, regulated or safety-critical use, check the underlying standard and its required precision. Historical and approximate units are identified in their names or family descriptions.

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