# Parsecs to Kilometers (pc to km) Source: https://www.unitconvertercalculator.com/length/parsecs-to-kilometers/ **1 pc = 30856775814914 km** One parsec equals approximately 3.086 x 1013 kilometers (about 30.86 trillion km). This is one of the most important astronomical conversions, connecting the standard metric road unit with the professional stellar distance unit. ## Formula Convert Parsecs to Kilometers ## Conversion Table | Parsecs (pc) | Kilometers (km) | |---|---| | 0.001 pc | 30856775814.914 km | | 0.01 pc | 308567758149.14 km | | 0.1 pc | 3085677581491.4 km | | 0.5 pc | 15428387907457 km | | 1 pc | 30856775814914 km | | 1.3 pc | 40113808559388 km | | 2 pc | 61713551629827 km | | 5 pc | 1.5428387907457E+14 km | | 10 pc | 3.0856775814914E+14 km | | 100 pc | 3.0856775814914E+15 km | | 1000 pc | 3.0856775814914E+16 km | | 10000 pc | 3.0856775814914E+17 km | | 30000 pc | 9.2570327444741E+17 km | | 770000 pc | 2.3759717377484E+19 km | ## Units ### Parsec (pc) The distance at which one astronomical unit subtends an angle of one arcsecond. Approximately 3.26 light-years or 30.857 trillion kilometers. The standard unit in professional astronomy. ### Kilometer (km) A metric unit of length equal to 1000 meters. The standard unit for measuring road distances and geographic distances in most countries. ## Background 1 pc = 30.86 trillion km. Proxima Centauri at 1.3 pc is about 40.1 trillion km. The Milky Way at 30,660 pc is about 946 quadrillion km across. Converting parsecs to km makes stellar distances feel real by expressing them in the unit people use daily. ## Good to Know The kilometer is the metric world's road unit. The parsec is the metric world's star unit. Both are metric (defined from meters). The ratio of 3 x 1013 between them is the distance from your car's odometer to the Milky Way's diameter. One metric system, two scales, one universe. ## FAQ ### How many kilometers are in 1 parsec? One parsec contains approximately 3.086 x 1013 km (about 30.86 trillion). ### How many parsecs is 1 kilometer? One kilometer equals approximately 3.241 x 10-14 parsecs. ### How far is the nearest star in km? Proxima Centauri at 1.3 pc is about 40.1 trillion km from Earth. ## Non-Frequently Asked Questions ### How many road trips around Earth equal 1 parsec? Earth's circumference is about 40,075 km. 1 parsec (30.86 trillion km) = about 770 million laps. If you drove around the world once per day, it would take 2.1 million years. 1 parsec of road trips would outlast Homo sapiens as a species. ### If every km of every road in the world were laid end-to-end, how many parsecs? Global road network: about 64 million km. 1 parsec = 30.86 trillion km. All roads = about 2.07 x 10-6 parsecs (two millionths). Humanity's entire road system reaches two millionths of the nearest parsec. We have not built enough road to matter stellarly. ### How many km does light travel per parsec-year? Light travels 9.461 trillion km per year. 1 parsec is 30.86 trillion km. So light covers 1 parsec in 30.86/9.461 = 3.262 years. This is why 1 parsec = 3.26 light-years. The km-to-parsec conversion proves the parsec-to-light-year relationship. ## Related Articles - [Why We Measure: The Deepest Urge in Human Civilisation](https://www.unitconvertercalculator.com/blog/why-we-measure) - [The Map Is Not the Territory: Why Every Measurement Is Wrong](https://www.unitconvertercalculator.com/blog/the-map-is-not-the-territory) - [Zero: The Most Dangerous Number in Measurement](https://www.unitconvertercalculator.com/blog/zero-the-most-dangerous-number-in-measurement) - [The Body as a Ruler: Every Measurement Unit That Came From Us](https://www.unitconvertercalculator.com/blog/the-body-as-a-ruler) - [The Speed of Everything: How We Measure From Glaciers to Light](https://www.unitconvertercalculator.com/blog/the-speed-of-everything) - [15 Obscure Measurement Units You've Never Heard Of (But Still Need)](https://www.unitconvertercalculator.com/blog/obscure-measurement-units-guide) - [When Measurements Go Wrong - Disasters, Blunders and Happy Accidents](https://www.unitconvertercalculator.com/blog/when-measurements-go-wrong) - [The Surprising Stories Behind Everyday Units of Measurement](https://www.unitconvertercalculator.com/blog/stories-behind-measurement-units) - [Metric vs. Imperial - The Complete Guide to the World's Two Measurement Systems](https://www.unitconvertercalculator.com/blog/metric-vs-imperial-complete-guide) - [Length & Distance Conversion Guide - Meters, Feet, Miles & Kilometers](https://www.unitconvertercalculator.com/blog/length-and-distance-guide) ## See Also - [Kilometers to Parsecs](https://www.unitconvertercalculator.com/length/kilometers-to-parsecs/)