How many parsecs are in one astronomical unit?

One astronomical unit equals 0.000005 pc. The formula is pc = AU × 0.000005.

How do I convert astronomical units to parsecs?

Multiply the value in astronomical units by 0.000005. For example, 100 × 0.000005 = 0.000485 — so 100 AU = 0.000485 pc.

How many astronomical units are in one parsec?

One parsec equals 206,264.806247 AU.

Pair · linear · factor 0.000005

astronomical units to parsecs

AUpc

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astronomical units · ≈ 14,959,787,070 km (base)

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An emerald parallax triangle with a star at its apex and a scale of cosmic distances, against a cosmic nebula in violet and magenta

Astronomical distances

A light-year is not time — how we measure the cosmos

Han Solo bragged he made the Kessel Run in less than twelve parsecs — but a parsec is a unit of distance, not time. We make the same slip with the light-year. Here is how astronomy handles distances that will not fit on Earth — and why our brains stumble over them.

12 min