Right triangle calculator
Solve a right triangle from any two known sides: legs, hypotenuse, area, and acute angles.
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Tool guide
Right triangle calculator: how it works
Practical information to understand the result and use this tool correctly.
About Right triangle calculator
Pythagoras links the legs and hypotenuse; inverse trig recovers the acute angles.
Toggle between two-legs mode and leg-plus-hypotenuse mode depending on what you know.
Common in framing, ramps, and vector magnitude problems.
How to use it
- 1Select mode: two legs, or leg + hypotenuse.
- 2Enter the known lengths.
- 3Read the missing side, area, and angles.
Frequently asked questions
- Where is the right angle?
- Between the two legs a and b; the hypotenuse is opposite it.
- Angle unit?
- Degrees.