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Right Triangle Trig Ratio Calculator

Calculate the tangent ratio from opposite and adjacent side lengths.

tan(θ): -
Visual representation

Right Triangle Trig Ratio Calculator diagram

The diagram updates with your entries and is illustrative, not necessarily drawn to scale.

Calculation explained

How this result was calculated

The formula, your substituted values, and the evaluated result are shown below.

The adjacent side must be non-zero. Both lengths must use the same unit, leaving a dimensionless ratio.
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How the Right Triangle Trig Ratio Calculator works

Calculate the tangent ratio from opposite and adjacent side lengths.

Formula

opposite ÷ adjacent

How to use this calculator

  1. Enter every measurement using one consistent length or angle unit.
  2. Select Calculate to evaluate the formula.
  3. Review the substituted values in the calculation explanation.

Interpretation and limitations

The adjacent side must be non-zero. Both lengths must use the same unit, leaving a dimensionless ratio. Decimal answers are rounded for display; retain additional precision for subsequent calculations.

Geometry collection

This calculator belongs to the Trigonometry section of the Math calculator library.

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