Parsec to Light-Year Converter

About this calculator

A parsec (short for "parallax of one arcsecond") is the distance at which a star would show a parallax shift of exactly one arcsecond as Earth orbits the Sun — it's the unit astronomers derive directly from parallax measurements. A light-year, by contrast, is simply the distance light travels in one Julian year.

This converter applies 1 pc = 3.2616 light-years ≈ 206,265 astronomical units, letting you move between the professional astronomy unit (parsecs) and the more intuitive public-facing one (light-years). Astronomy students, educators and stargazers use it to translate catalog distances — often published in parsecs — into figures that are easier to visualize.