Unit definitions

Radian

The radian is the unit of angle in the SI. A full circle is $2\pi$ radians, where $\pi$ is approximately $3.141\,592\,653\,589\,793$.

Degree

The degree is a unit of angle commonly used in daily life. One full circle consists of $360$ degrees.

Arcminute (Minute Angle)

$\frac{1}{60}$ of a degree is an arcminute.

Arcsecond (Second Angle)

$\frac{1}{3\,600}$ of a degree is an arcsecond. It is used in places where extremely precise measurements are required. It is said that the US dime is $1$ arcsecond wide from $2.3$ miles away.

Revolution

One revolution is equal to $2\pi$ radians (i.e., a full circle).

Centiradian

$\frac{1}{100}$ of a radian is a centiradian.

Grade

A grade is defined as $\frac{1}{400}$ of a revolution. It is also known as the gon or the gradian.

Convert Radian to other Angle units

Convert Radian to other Angle units

Radian [rad]	Other unit
1	57.29578 Degree [°]
1	3437.746771 Arcminute (Minute Angle) [′]
1	0.159155 Revolution [rev]
1	206264.806247 Arcsecond (Second Angle) [′′]
1	1E+2 Centiradian [centiradian]
1	63.661977 Grade [grad]