21 Arc Minutes to Degrees

21' = 0.35°

Calculation: ° = 21' × 0.0166667 = 0.35°

Arc Minute to Degree 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 21'?

21 arc minute (0.35 degrees) is comparable to the precision of a telescope crosshair, an almost imperceptible angle.

What does 21' look like?

Illustration of a telescope crosshair reticle
21 arc minute (0.35 degrees) is comparable to the precision of a telescope crosshair, an almost imperceptible angle.

How to Convert Arc Minute to Degree

1 arc minute = 0.0166667 degrees

Degree = Arc Minute × 0.0166667

Example: 21' × 0.0166667 = 0.35°

Reverse Conversion

To convert degrees back to arc minutes:

  • Remember, 1 degree equals 60 arc minutes.
  • To convert 0.35° to', multiply 0.35 x 60, resulting in 21'.

21 ' is also equal to:

  • 0.0061087 radian
  • 0.38889 gradian
  • 0.00097222 turn

Frequently Asked Questions

How much is 21 arc minutes in degrees?

21 arc minutes equals 0.35 degrees. This is calculated by multiplying 21 by the conversion factor 0.0166667.

What does 21 arc minutes look like in degrees?

21 arc minutes equals 0.35 degrees, a conversion used in navigation, trigonometry, and engineering design.

How do you calculate 21 arc minutes to degrees?

Multiply 21 by the conversion factor 0.0166667. The calculation is 21 × 0.0166667 = 0.35 degrees. This factor is defined by international measurement standards.

Share This Calculation

21 arc minutes = 0.35 degrees
21 arc minutes = 0.35 degrees — conversion chart

Nearby Conversions

11 arc minutes0.1833 degrees 12 arc minutes0.2 degrees 13 arc minutes0.2167 degrees 14 arc minutes0.2333 degrees 15 arc minutes0.25 degrees 16 arc minutes0.2667 degrees 17 arc minutes0.2833 degrees 18 arc minutes0.3 degrees 19 arc minutes0.3167 degrees 20 arc minutes0.3333 degrees 22 arc minutes0.3667 degrees 23 arc minutes0.3833 degrees 24 arc minutes0.4 degrees 25 arc minutes0.4167 degrees 26 arc minutes0.4333 degrees 27 arc minutes0.45 degrees 28 arc minutes0.4667 degrees 29 arc minutes0.4833 degrees 30 arc minutes0.5 degrees 31 arc minutes0.5167 degrees

For general conversions between arc minutes and degrees, see the arc minutes to degrees 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.