A parsec is about 3.26156 light-years.
Parsecs to Meters Converter — pc to m
Convert Parsec (pc) to Meter (m) using the exact conversion factor (1 parsec = 3.085678e+16 meter). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Parsecs to Meters converter
Converter
Length Converter
Convert SI, imperial, US customary, astronomical, scientific, and historical length units.
Context values
Some unit families need one extra value for a physically accurate result.
The meter is the SI base unit of length.
Result = input x 3.08567758e+16 / 1.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Parsecs to Meters
Parsec and Meter both measure length. Parsec is typically associated with standard distance unit throughout professional astronomy worldwide, while Meter is typically associated with standard length unit worldwide except the US.
Formula
meters = parsecs × 3.085678e+16
This factor comes from each unit's defined relationship to the category's base unit: 1 parsec equals 3.085678e+16 base units, and 1 meter equals 1 base unit, so dividing one by the other gives the direct parsec-to-meter factor of 3.085678e+16.
Simple example
1 pc × 3.085678e+16 = 3.085678e+16 m
1 parsec = 3.085678e+16 meters.
Real-world example
10 pc × 3.085678e+16 = 3.085678e+17 m
10 parsecs = 3.085678e+17 meters.
Conversion table
| Parsec (pc) | Meter (m) |
|---|---|
| 1 pc | 3.085678e+16 m |
| 5 pc | 1.542839e+17 m |
| 10 pc | 3.085678e+17 m |
| 21.0975 pc | 6.510008e+17 m |
| 42.195 pc | 1.302002e+18 m |
| 100 pc | 3.085678e+18 m |
Reverse conversion: Meter to Parsec
3.085678e+16 m × 3.240779e-17 = 1.000000136 pc
3.085678e+16 meters = 1.000000136 parsecs.
parsecs = meters × 3.240779e-17
For a page dedicated to this direction, see Meter to Parsec.
Parsec vs. Meter
| Aspect | Parsec | Meter |
|---|---|---|
| Family | non-SI unit used in astronomy | SI base unit |
| Typical use | Measuring distances to nearby stars via parallax | Universal scientific and everyday length measurement outside the US |
| Where it's used | Standard distance unit throughout professional astronomy worldwide | Standard length unit worldwide except the US |
Understanding the Parsec
Parsec (pc) measures astronomical distance. The distance at which one astronomical unit subtends an angle of one arcsecond — approximately 3.26 light-years, or about 3.086 × 10¹⁶ meters. It is classified as a non-SI unit used in astronomy.
Where it's used: Standard distance unit throughout professional astronomy worldwide
Uses of the Parsec today
- Measuring distances to nearby stars via parallax
- Galactic and extragalactic distance scales in astrophysics research
History of the Parsec
The name is a portmanteau of 'parallax' and 'arcsecond,' reflecting how the unit is defined directly from the parallax method astronomers use to measure stellar distances: the tiny apparent shift in a nearby star's position as Earth orbits the Sun.
Historical origin. Parsec was not the invention of a single named person; it developed through the process described above.
Understanding the Meter
Meter (m) measures distance. The meter is the SI base unit of length, currently defined via the fixed speed of light. It is classified as a SI base unit.
Where it's used: Standard length unit worldwide except the US
Uses of the Meter today
- Universal scientific and everyday length measurement outside the US
- Construction, engineering, and manufacturing internationally
History of the Meter
Defined during the French Revolutionary metric reforms as one ten-millionth of the distance from the North Pole to the Equator, the meter has been redefined several times for precision — a platinum-iridium bar (1889), a krypton-86 wavelength (1960), and since 1983, the distance light travels in 1/299,792,458 of a second.
Historical origin. Meter was not the invention of a single named person; it developed through the process described above.
Parsec — sources
- IAU (International Astronomical Union) — parsec definition — Standard astronomical definition of the parsec via stellar parallax.
Meter — sources
- BIPM — The metre (SI base unit) — Current definition and history of the meter.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many meters are in 1 parsec?
1 parsec equals 3.085678e+16 meters, using the exact defined conversion factor rather than an estimate.
How do I convert parsec to meter?
Multiply the parsec value by 3.085678e+16. The converter above does this instantly to whatever precision you set.
How do I convert meter back to parsec?
Use the reverse factor: 1 meter equals 3.240779e-17 parsecs. You can also use the swap control in the converter above to flip the direction instantly.
What is a parsec?
Parsec (pc) measures astronomical distance. The distance at which one astronomical unit subtends an angle of one arcsecond — approximately 3.26 light-years, or about 3.086 × 10¹⁶ meters. It is classified as a non-SI unit used in astronomy.
What is a meter?
Meter (m) measures distance. The meter is the SI base unit of length, currently defined via the fixed speed of light. It is classified as a SI base unit.
Is the parsec to meter conversion exact?
Yes. Both parsec and meter are defined by fixed standards rather than physical artifacts, so the factor of 3.085678e+16 used above is exact to as many digits as you choose to display.
Where is the parsec still used today?
Standard distance unit throughout professional astronomy worldwide