How to Convert 90 Degrees to Radians
- 1). Divide the angle in degrees by 180 degrees. Dividing 90 degrees by 180 degrees results in 1/2.
- 2). Multiply the product of the previous step by π. 1/2 multiplied by π equals 1.571. 90 degrees equals 1.571 radians.
- 3). Browse to an online converter, such as the University of Texas radians and degrees page, to check your work. Enter "90" in the text box under the "Degrees" label and then click "Calculate." The amount in radians will appear in the text box under the "Radians" label.