Arctan Calculator

Easily calculate the arctangent of a number and convert between radians and degrees.

Enter Tangent Value:

Results:

Arctan (Radians):

Arctan (Degrees):

Understanding Arctan (Inverse Tangent)

The arctangent, also known as the inverse tangent or atan, is the inverse function of the tangent. In simpler terms, if you know the tangent of an angle, the arctangent gives you back the angle itself.

Mathematically, if , then .

The result of arctan is typically given in radians or degrees, representing the angle. Radians are a unit of angle measurement based on the radius of a circle, while degrees are a more common unit where a full circle is 360 degrees.

This calculator helps you find the angle when you know the tangent value, useful in trigonometry, physics, engineering, and computer graphics.

For example, if you input 1 into the calculator, it will return approximately 0.785 radians or 45 degrees, because or .