21 Minutes to Radians

21' ≈ 0.0061087 rad

Calculation: rad = 21' × 0.000290888 ≈ 0.0061087 rad

Minute to Radian Converter

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Sig. Figures:

How wide is 21'?

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

How to Convert Minute to Radian

1 minute = 0.000290888 radians

Radian = Minute × 0.000290888

Example: 21' × 0.000290888 = 0.0061087 rad

Reverse Conversion

To convert radians back to minutes:

  • Remember, 1 radian equals 3437.75 minutes.
  • To convert 0.0061087 rad to', multiply 0.0061087 x 3437.75, resulting in 21'.

21 ' is also equal to:

  • 0.35 degree
  • 0.38889 gradian
  • 0.00097222 turn
About these units

Minute: An arcminute (minute of arc) is 1/60 of a degree.It is used in astronomy, optics, navigation, geodesy, and surveying for small angular measurements.

Radian: The radian (rad) is the SI derived unit of plane angle. It is defined as the angle subtended at the center of a circle by an arc equal in length to the radius.Although mathematically dimensionless, th...

Frequently Asked Questions

How much is 21 minutes in radians?

21 minutes equals 0.0061087 radians. This is calculated by multiplying 21 by the conversion factor 0.000290888.

What does 21 minutes look like in radians?

21 minutes (0.0061087 radians) is a small angular division; 60 arc minutes make one degree.

How do you calculate 21 minutes to radians?

Multiply 21 by the conversion factor 0.000290888. The calculation is 21 × 0.000290888 = 0.0061087 radians. This factor is defined by international measurement standards.

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21 minutes = 0.00610865 radians
21 minutes = 0.00610865 radians — conversion chart

Nearby Conversions

11 minutes0.0032 radians 12 minutes0.003491 radians 13 minutes0.003782 radians 14 minutes0.004072 radians 15 minutes0.004363 radians 16 minutes0.004654 radians 17 minutes0.004945 radians 18 minutes0.005236 radians 19 minutes0.005527 radians 20 minutes0.005818 radians 22 minutes0.0064 radians 23 minutes0.00669 radians 24 minutes0.006981 radians 25 minutes0.007272 radians 26 minutes0.007563 radians 27 minutes0.007854 radians 28 minutes0.008145 radians 29 minutes0.008436 radians 30 minutes0.008727 radians 31 minutes0.009018 radians

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

Also convert Minutes to:

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.