About the Tangent Calculator
Calculate tan(θ) for any angle in degrees or radians, with exact values for special angles and the related reciprocal function.
Also known as: tan calculator, tan of angle, tangent function, tan x.
How to use this calculator
- Enter angle θ, unit.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
tan θ = opposite / adjacent = sin θ / cos θ
Worked example
Using the values pre-filled in the calculator above:
- Angle θ = 30
- Unit: Degrees
the calculator returns:
- tan(θ): 0.5773502692
- cot(θ): 1.7320508076
- Angle in radians: 0.52359878
- Angle in degrees: 30