Degree to radian calculator - Unit converter
The command rad converts degrees to radians. If you input rad 90 180 270 in the search form, the calculator shows the radians of 90°, 180°, 270° as follows.
rad 90 180 270
rad
(90) = 1.5707963267948966
(180) = 3.141592653589793
(270) = 4.71238898038469
90° is about 1.57 radians and 180° is about 3.14 radians. The following equation provides the relationship of degree and radian.
\[ 1^{\circ} = \frac{\pi}{180} \ \mathrm{rad} \]
The rad unit is normally omitted.
\[ 1^{\circ} = \frac{\pi}{180} \]
Note
You can convert several values in degree to radians and those should be separated by a space. If you want to convert radians to degrees, use the command deg.