Arctangent Calculator
Calculate the arctangent (arctan) of a value and get the angle in degrees, radians and gradians. Accepts any real number.
Degrees (°)
Radians
Gradians
What is Arctan?
Arctan (arc tangent) is the inverse of the tangent: given a value x, it returns the angle θ such that tan(θ) = x. The result is always in the interval (−90°, 90°).
Examples: arctan(0) = 0°, arctan(1) = 45°, arctan(√3) = 60°. Accepts any real number — the domain is (−∞, +∞).
As x → +∞, arctan(x) → 90°. As x → −∞, arctan(x) → −90°.
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