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Length & Distance

Parsecs to Light Years

Convert pc to ly quickly with this free online calculator. The page explains the conversion rule, gives practical examples and provides a quick reference table.

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CONVERTED RESULT—
Decimal places
CONVERSION RULE

One parsec is approximately 3.26156 light-years.

How to use the Parsecs to Light Years

  1. Enter the number you want to convert.
  2. Confirm the source unit shown beside the input.
  3. Choose decimal precision if you need more or less detail.
  4. Read the converted result.
  5. Copy the result when you need to use it elsewhere.

How the conversion works

One parsec is approximately 3.26156 light-years.

For a simple fixed-factor conversion, the calculator multiplies the entered value by the stated factor. Temperature scales and certain specialized tools use their specific mathematical relationship instead.

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Common pc to ly conversions

pcly
1 pc3.261564 ly
2 pc6.523128 ly
5 pc16.307819 ly
10 pc32.615638 ly
20 pc65.231276 ly
50 pc163.078189 ly

Example

For example, entering 1 pc gives approximately 3.261564 ly using the rule above. Change the input to test your own value.

Frequently asked questions

The Parsecs to Light Years converts a value from pc to ly using the conversion relationship described on this page.
Enter your value, review the source and destination units, choose the decimal precision and read or copy the result.
One parsec is approximately 3.26156 light-years.
Use enough precision for your purpose. Everyday estimates usually need fewer decimal places; technical work may require more.
It can be a useful reference calculation, but safety-critical, regulated, contractual or specialized work should be verified against the applicable authoritative standard.

Accuracy note: This calculator is a practical reference. For regulated, safety-critical or specialized work, verify the result against the applicable standard.

Page reviewed: August 24, 2026.