438 Arc Seconds to Radians

438" ≈ 0.0021235 rad

Calculation: rad = 438" × 4.84814 × 10⁻⁶ ≈ 0.0021235 rad

Arc Second to Radian Converter

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Sig. Figures:

How wide is 438"?

438 arc second (0.122 degrees) is comparable to the precision of a telescope crosshair, an almost imperceptible angle.

What does 438" look like?

Illustration of a telescope crosshair reticle
438 arc second (0.122 degrees) is comparable to the precision of a telescope crosshair, an almost imperceptible angle.

How to Convert Arc Second to Radian

1 arc second = 4.84814 × 10-6 radians

Radian = Arc Second × 4.84814 × 10-6

Example: 438" × 4.84814 × 10-6 = 0.0021235 rad

Reverse Conversion

To convert radians back to arc seconds:

  • Remember, 1 radian equals 206265 arc seconds.
  • To convert 0.0021235 rad to", multiply 0.0021235 x 206265, resulting in 438".

438 " is also equal to:

  • 0.12167 degree
  • 0.13519 gradian
  • 0.00033796 turn

Frequently Asked Questions

How much is 438 arc seconds in radians?

438 arc seconds equals 0.0021235 radians. This is calculated by multiplying 438 by the conversion factor 4.84814 × 10⁻⁶.

What does 438 arc seconds look like in radians?

438 arc seconds equals 0.0021235 radians, a conversion used in navigation, trigonometry, and engineering design.

How do you calculate 438 arc seconds to radians?

Multiply 438 by the conversion factor 4.84814 × 10⁻⁶. The calculation is 438 × 4.84814 × 10⁻⁶ = 0.0021235 radians. This factor is defined by international measurement standards.

Share This Calculation

438 arc seconds = 0.00212348 radians
438 arc seconds = 0.00212348 radians — conversion chart

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For general conversions between arc seconds and radians, see the arc seconds to radians converter.

Conversion factors verified against BIPM, ISO 80000-3 1 turn = 2π rad = 360° (exact, ISO 80000-3). Last reviewed: March 2026
Adilson Fernandes By Adilson Fernandes
Tiago Fernandes Reviewed by Tiago Fernandes

All unit conversions on CoolConversion use conversion factors defined or documented by internationally recognised standards bodies (such as ISO and NIST), including both SI and non-SI units.