Convert » Unit Converter » Length » Parsec → Lightyear

Parsec → Lightyear (pc → ly)

pc to ly direct conversion page with calculator, reverse conversion and comparison table.

1 pc = 3.2615637771675 ly
1 Parsec (pc) = 3.2615637771675 Lightyear (ly).


swap converter

If you want to reverse convert, use Lightyear → Parsec. 1 ly = 0.30660139378555 pc. You can also explore the full Length converter page for more cross conversions.

Conversion formula

Parsec to Lightyear formula: value in ly = value in pc × 3.2615637771675.

Lightyear to Parsec formula: value in pc = value in ly × 0.30660139378555.

How to convert Parsec to Lightyear

To convert Parsec to Lightyear, multiply the value in pc by 3.2615637771675. This gives the result in ly.

For example, 1 pc = 3.2615637771675 ly and 10 pc = 32.615637771675 ly.

What is Parsec?

Parsec (pc): An astronomical distance unit of about 3.26 light-years. Kiloparsecs and megaparsecs are used for larger distances between stars and galaxies. 1 pc ≈ 3.0856775814914 × 10¹⁶ m ≈ 3.26156 ly.

What is Lightyear?

Lightyear (ly): The distance light travels in vacuum during one Julian year. Despite its name, it measures distance rather than time and is used between stars. 1 ly = 9460730472580800 m.

FAQ

How many lightyear are in 1 parsec?

There are 3.2615637771675 ly in 1 pc.

Why can conversion results differ slightly?

Check the unit definition and rounding. US and imperial measures can differ; rounding intermediate values can also change the final digits.

How do I convert parsec to lightyear?

Multiply the value in pc by 3.2615637771675 to get the value in ly.

Parsec → other Length units

  • 1 parsec = 3.0856775814914E+16 meter
  • 1 parsec = 30856775814914 kilometer
  • 1 parsec = 3.0856775814914E+17 decimeter
  • 1 parsec = 3.0856775814914E+18 centimeter
  • 1 parsec = 3.0856775814914E+19 millimeter
  • 1 parsec = 3.0856775814914E+22 micrometer
  • 1 parsec = 3.0856775814914E+25 nanometer
  • 1 parsec = 3.0856775814914E+28 picometer
  • 1 parsec = 16661326033971 nautical mile
  • 1 parsec = 19173511576713 mile
  • 1 parsec = 1.6872690187508E+16 fathom
  • 1 parsec = 3.3745380375015E+16 yard
  • 1 parsec = 1.0123614112505E+17 feet
  • 1 parsec = 1.2148336935006E+18 inch
  • 1 parsec = 3.0370842337514E+17 hand
  • 1 parsec = 206264.8062471 astronomical unit
  • 1 parsec → lightyear = 3.2615637771675 lightyear

Parsec → Lightyear Table

The table below shows common values from Parsec to Lightyear and the reverse direction for quick reference.

pclyRounded
1 pc3.2615637771675 ly3.2616
2 pc6.5231275543349 ly6.5231
3 pc9.7846913315024 ly9.7847
4 pc13.04625510867 ly13.0463
5 pc16.307818885837 ly16.3078
10 pc32.615637771675 ly32.6156
12 pc39.13876532601 ly39.1388
15 pc48.923456657512 ly48.9235
20 pc65.231275543349 ly65.2313
25 pc81.539094429187 ly81.5391
30 pc97.846913315024 ly97.8469
40 pc130.4625510867 ly130.4626
50 pc163.07818885837 ly163.0782
75 pc244.61728328756 ly244.6173
100 pc326.15637771675 ly326.1564
200 pc652.31275543349 ly652.3128
250 pc815.39094429187 ly815.3909
500 pc1630.7818885837 ly1630.7819
750 pc2446.1728328756 ly2446.1728
1000 pc3261.5637771675 ly3261.5638
2500 pc8153.9094429187 ly8153.9094
5000 pc16307.818885837 ly16307.8189
10000 pc32615.637771675 ly32615.6378

Lightyear → Parsec Table

lypcRounded
1 ly0.30660139378555 pc0.3066
2 ly0.61320278757109 pc0.6132
3 ly0.91980418135664 pc0.9198
4 ly1.2264055751422 pc1.2264
5 ly1.5330069689277 pc1.5330
10 ly3.0660139378555 pc3.0660
12 ly3.6792167254266 pc3.6792
15 ly4.5990209067832 pc4.5990
20 ly6.1320278757109 pc6.1320
25 ly7.6650348446387 pc7.6650
30 ly9.1980418135664 pc9.1980
40 ly12.264055751422 pc12.2641
50 ly15.330069689277 pc15.3301
75 ly22.995104533916 pc22.9951
100 ly30.660139378555 pc30.6601
200 ly61.320278757109 pc61.3203
250 ly76.650348446387 pc76.6503
500 ly153.30069689277 pc153.3007
750 ly229.95104533916 pc229.9510
1000 ly306.60139378555 pc306.6014
2500 ly766.50348446387 pc766.5035
5000 ly1533.0069689277 pc1533.0070
10000 ly3066.0139378555 pc3066.0139

Lightyear → Parsec

The reverse value is 1 ly = 0.30660139378555 pc.