pc

What is a Parsec?

Parsec is a length unit used to express distance, size or travel range in practical measurement work.

Parsec is a length unit used to express distance, size or travel range in practical measurement work.

Parsec became established as a practical length unit in technical, commercial or scientific use.

Measurement system: Metric, imperial and internationally standardized length usage. SI equivalent: 1 pc = 3.085678e+16 m.

Parsec facts

Unit name
Parsec
Symbol
pc
Category
Length
Measurement system
Metric, imperial and internationally standardized length usage
SI equivalent
1 pc = 3.085678e+16 m
Common uses
Distance, dimensions, navigation and physical measurement

Definition of the parsec

Parsec is a length unit used to express distance, size or travel range in practical measurement work.

Measurement system and SI relationship

Metric, imperial and internationally standardized length usage

SI equivalent: 1 pc = 3.085678e+16 m

History of the parsec

Parsec became established as a practical length unit in technical, commercial or scientific use.

Where is the parsec used?

Distance, dimensions, navigation and physical measurement

Parsec conversion tools

Sources

The definitions and conversion relationships on this page are aligned with standard metrology and SI reference material.

  1. BIPM: The International System of Units (SI Brochure)
  2. NIST: SI Units – Length
  3. NIST: Guide for the Use of the International System of Units

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