Math Calculators
Right Triangle Calculator
Solve a right triangle from its two legs.
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About the Right Triangle Calculator
Solve a right triangle in one step. Enter the two legs and the calculator returns the hypotenuse, both acute angles, the area, and the perimeter. It's handy for trigonometry homework, carpentry, and any project where you need a full picture of a right triangle from just two sides.
How to use the Right Triangle Calculator
- 01Enter your the two legs (a and b).
- 02Read the result instantly — it recalculates as you type.
- 03Adjust the numbers to model different scenarios.
Frequently asked questions
How do you find the angles of a right triangle?
Use inverse tangent: angle A = arctan(a ÷ b). The two acute angles always add to 90°.
What is the area of a right triangle?
Half the product of the two legs: area = (a × b) ÷ 2.