Arctan Calculator

Calculate the Arctan (inverse tangent) angle in degrees and radians.

The Arctan (inverse tangent) function is the inverse function of tangent.

How to calculate Arctan?

  1. Enter the tangent value in the "arctan" field.
  2. Click the "calculate" button.
  3. Get the Arctan angle in both degrees and radians in the corresponding results fields.


Arccos ° rad
1 45° π/4
0 0
-1 -45° -π/4

See Also: