Degree to Radian Converter
Convert degrees to radians instantly with an angle calculator built for geometry, trigonometry, surveying, navigation, astronomy, and engineering reference.
° to rad Calculator
Enter an angle value and the conversion updates automatically.
Result updates automatically.
radians = degrees × π ÷ 180
How to Convert Degree to Radian
Angle conversion uses radians as the base angular measure. The calculator converts the source angle into radians, then formats it in the selected output unit. This supports common math, mapping, navigation, surveying, and engineering workflows.
1 degree
0.0174532925 radians
10 degrees
0.1745329252 radians
Formula
radians = degrees × π ÷ 180
Angle Formula Notes
Use these formula references to verify the calculator output or document the conversion in math and engineering work.
Degrees to Radians Converter FAQ
Which angle units are supported?
This tool supports degrees, radians, gradians, arcminutes, arcseconds, and turns.
How do I convert ° to rad?
radians = degrees × π ÷ 180 The calculator performs the formula automatically.
Can I reverse the angle conversion?
Yes. Use the swap button to reverse the selected units and calculate the opposite direction.