It uses the exact defined conversion factors for each unit and shows results to 10 significant digits. A full turn is 360 degrees, 2π radians or 400 gradians.
How do I convert degrees to radians?
Enter the value, choose degrees in the "From" list and radians in the "To" list. For example, 1 degree equals 0.0174532925 rad.
Is the converter free?
Yes. It is free, needs no sign-up and runs entirely in your browser, so it also works offline once the page has loaded.