Reference Angle and Quadrant Calculator

This online calculator finds the reference angle and the quadrant of a trigonometric a angle in standard position. The reference angle is defined as the acute angle between the terminal side of the given angle and the x axis. The given angle may be in degrees or radians.

How to use the calculator

1 - Enter the angle:
  • in Degrees top input. (example 745)
  • in Radians second input. (example 12/5 π)
then press the button "enter" on the same row.
If you enter a quadrantal angles such as 90, -180, 0..., the message "This is a quadrantal angle" will be displayed.


Enter Angle in Degrees


Reference Angle in Degrees

Quadrant

Enter Angle in Radians
π

Reference Angle in Radians
π
Quadrant

More References and links

Find Reference Angle.
Questions on Angles in Standard Position.
Angle in Standard Position. Trigonometry Angle Questions With Answers.
Maths Calculators and Solvers.