Right Triangle Calculator

Solve a right triangle from common combinations of legs, hypotenuse, and acute angles.

Preparing Right Triangle Calculator

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Input

Choose the right-triangle case that matches your data, then enter the known side lengths or acute angle values. You will see the result first and the step-by-step solution below.

Input summary

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Step by Step Calculation

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Calculate first and the full working will appear below automatically.

How to use Right Triangle Calculator

Pick the data combination you have, and the calculator will solve the remaining sides and acute angles of the right triangle.

What this calculator is for

This calculator is for trigonometry practice, construction measurements, and right-triangle problems where one side or angle still needs to be found.

Tips

Enter acute angles only; the right angle is already built into the problem.
Check whether the given side is a leg or the hypotenuse before selecting a mode.
Keep side units consistent so all solved lengths match.