Fathoms to Astronomical Units Converter

Conversion Updated 15 Jun 2026

This Fathoms to Astronomical Units Converter lets you convert Fathoms (fth) into Astronomical units (AU) in one step. Enter a value in fathoms and you'll instantly see the equivalent in astronomical units, worked out with the formula AU = fth x 1.2224772929204532e-11. It's handy whenever you need a quick, precise fathoms-to-astronomical units conversion without doing the arithmetic by hand.

  • Conversion constants are fixed and do not vary by region.

Formula

AU = fth x 1.2224772929204532e-11
  • To convert fathoms to astronomical units, multiply your value by the fixed factor 0.000000000012 (so 1 fth = 0.000000000012 AU).
  • The factor comes from the internationally agreed definitions of each unit, so it never changes.
  • Displayed results are rounded for readability, but the full-precision value is used in the calculation.

Example

Inputs
  • Fathoms (fth): 100

Start with 100 fth. Multiply by 0.000000000012 to get 0.000000001222 AU.

Frequently asked questions

How do I convert fathoms to astronomical units?
Multiply the number of fathoms by 0.000000000012. For example, 100 fth equals 0.000000001222 AU.
Are these conversion factors accurate?
Yes. The calculator uses internationally accepted definitions for each unit, so the conversion factor is exact.
Why can tiny differences appear after conversion?
Very small differences are only a display effect from rounding the output. The underlying calculation keeps full precision.