388 Arc Seconds to Radians

388" ≈ 0.0018811 rad

Calculation: rad = 388" × 4.84814 × 10⁻⁶ ≈ 0.0018811 rad

Arc Second to Radian Converter

Choose the type of measurement to convert
Select the source unit to convert from
Select the target unit to convert to
Enter a numeric value or fraction to convert
Sig. Figures:

How wide is 388"?

388 arc second (0.108 degrees) is comparable to the precision of a telescope crosshair, an almost imperceptible angle.

What does 388" look like?

Illustration of a telescope crosshair reticle
388 arc second (0.108 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: 388" × 4.84814 × 10-6 = 0.0018811 rad

Reverse Conversion

To convert radians back to arc seconds:

  • Remember, 1 radian equals 206265 arc seconds.
  • To convert 0.0018811 rad to", multiply 0.0018811 x 206265, resulting in 388".

388 " is also equal to:

  • 0.10778 degree
  • 0.11975 gradian
  • 0.00029938 turn

Frequently Asked Questions

How much is 388 arc seconds in radians?

388 arc seconds equals 0.0018811 radians. This is calculated by multiplying 388 by the conversion factor 4.84814 × 10⁻⁶.

What does 388 arc seconds look like in radians?

388 arc seconds equals 0.0018811 radians, a conversion used in navigation, trigonometry, and engineering design.

How do you calculate 388 arc seconds to radians?

Multiply 388 by the conversion factor 4.84814 × 10⁻⁶. The calculation is 388 × 4.84814 × 10⁻⁶ = 0.0018811 radians. This factor is defined by international measurement standards.

Share This Calculation

388 arc seconds = 0.00188108 radians
388 arc seconds = 0.00188108 radians — conversion chart

Nearby Conversions

338 arc seconds0.001639 radians 343 arc seconds0.001663 radians 348 arc seconds0.001687 radians 353 arc seconds0.001711 radians 358 arc seconds0.001736 radians 363 arc seconds0.00176 radians 368 arc seconds0.001784 radians 373 arc seconds0.001808 radians 378 arc seconds0.001833 radians 383 arc seconds0.001857 radians 393 arc seconds0.001905 radians 398 arc seconds0.00193 radians 403 arc seconds0.001954 radians 408 arc seconds0.001978 radians 413 arc seconds0.002002 radians 418 arc seconds0.002027 radians 423 arc seconds0.002051 radians 428 arc seconds0.002075 radians 433 arc seconds0.002099 radians 438 arc seconds0.002123 radians

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.