Light-years to Parsecs Converter
Convert light-years to parsecs. The formula used here is 1 light-year = 0.306601393786 parsecs. The formula is pc = ly × 0.306601393786; 1 ly is 0.306601 pc.
The distance light travels in one Julian year in a vacuum.
An astronomical distance unit based on parallax, commonly used for stars.
Start with your value in light-years, then apply the formula below. It stays visible so you can catch rounding mistakes instead of just copying the output.
When the converted length drives a cut, fit, clearance, or route estimate, decide whether to round to the nearest mark, round up for safety, or keep decimals for documentation.
Many length factors are exact by definition, but practical measurements still depend on rulers, survey tools, tolerances, and how the result will be used. This page displays converted values with up to 6 decimal places by default.
| Light-years | Parsecs |
|---|---|
| 1 ly | 0.306601 pc |
| 4.24 ly | 1.29999 pc |
| 10 ly | 3.066014 pc |
| 100 ly | 30.660139 pc |
| 1,000 ly | 306.601394 pc |
Useful for checking construction and DIY measurements. Use the same formula with your exact input if the measurement needs to be documented.
Useful for travel, mapping, or athletics distances. Use the same formula with your exact input if the measurement needs to be documented.
Useful for product dimensions and classroom conversions. Use the same formula with your exact input if the measurement needs to be documented.
How do I convert light-years to parsecs?
Enter the value in light-years and apply pc = ly × 0.306601393786. Round the parsecs result after the conversion, not before.
What is 1 light-year in parsecs?
1 ly equals 0.306601 pc with the current rounding setting. Keep more decimal places when the result feeds another calculation.
What is 4.24 ly in pc?
4.24 ly is 1.29999 pc. It appears in the lookup table so you can compare it with nearby amounts.
Can I convert parsecs back to light-years?
Yes. Use the reverse Parsecs to Light-years converter if you need to go the other direction.
How accurate is this light-years to parsecs conversion?
The calculator runs the formula in your browser and rounds results to 6 decimal places by default. Many length factors are exact by definition, but practical measurements still depend on rulers, survey tools, tolerances, and how the result will be used.