Right Triangle Calculator

Enter value and click on calculate. Result will be displayed.

Select calculator :

Opposite Side: (Perpendicular) :

Hypotenuse Side :

Adjacent Side: (Base):

Angle θ:

Angle b = (90 - θ):

Result:

Opposite Side :

Angle θ :

Angle b = (90 - θ) :

A Right Triangle Calculator is a tool used to solve for the sides, angles, area, or perimeter of a right triangle — a triangle that has one 90° angle. It uses key mathematical principles like the Pythagorean theorem and trigonometric functions (sine, cosine, tangent) to make calculations simple and quick.

Why use a Right Triangle Calculator?

Accuracy: Quickly and precisely find missing sides or angles without manual calculations.
Simplicity: Avoid doing complex trigonometry or square root calculations by hand.
Learning: Understand the relationships between sides and angles in right triangles.
Real-world applications: Useful in construction, architecture, navigation, physics, and engineering.

How does it work?

Input: You enter known values — like two sides, or one side and one angle (other than the right angle).
Calculation: The calculator uses formulas like:
- Pythagorean theorem: a² + b² = c² (where c is the hypotenuse)
- Trigonometry:
Results: It calculates missing sides, angles, area, perimeter, or other values depending on what’s asked.

When do you use it?

Construction and carpentry: Ensuring walls and angles are squared properly.
Navigation and mapping: Calculating distances and angles between points.
Physics and engineering: Solving problems involving forces, vectors, and inclines.
Math homework or education: Checking work on trigonometry or geometry problems.