Triangle Calculator

Use our simple online Triangle Calculator to solve Triangle problems with step-by-step explanation.

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How to use the Triangle Calculator


Step 1

Enter your Triangle problem in the input field.


Step 2

Press Enter on the keyboard or on the arrow to the right of the input field.


Step 3

In the pop-up window, select the needed operation. You can also use the search.

What are Triangles

Enter 3 known values, for example 2 sides and 1 angle or 3 sides, and click Calculate to find out the remaining sides, angles, and area of the triangle. The triangle is the basic shape of geometry found all over the place. The calculation of all geometric figures and bodies is based on the presence of certain triangles in them, which makes it possible to apply many theorems and formulas that are not characteristic of specific figures separately.

Equilateral triangles, isosceles triangles and right-angled triangles make up the framework for solving geometric problems, and with many additional constructions inside the triangle, they provide a huge number of values of certain lengths. All bisectors, medians, heights, radii of circles inscribed or described around such triangles can be calculated in this section using a geometric calculator.

With an online calculator, you can calculate the height of a triangle through formulas. To calculate the height of a triangle, just enter your details. The online triangle area calculator will help you find the area of a triangle in several ways, depending on the known data. Our calculator will not only calculate the area of a triangle, but will also show you a detailed solution, which will be shown below the calculator.

Therefore, this calculator is convenient to use not only for quick calculations, but also for checking your calculations. With this calculator, you can find the area of a triangle using the following formulas: through the base and height, through two sides and an angle, along three sides (Heron's formula), through the radius of the inscribed circle, through the radius of the circumscribed circle.