Triangle Area Calculator

Calculate the area of a triangle using Heron's formula. Enter the lengths of the three sides to find the area.

Enter Triangle Sides

Input the lengths of the three sides of the triangle to calculate its area using Heron's formula.

Side A

Side B

Side C

Result

Area:

Formula Used:

$$ Area = \sqrt{s(s-a)(s-b)(s-c)} $$, where $$ s = \frac{a+b+c}{2} $$

Triangle Visualization

Visual representation of a triangle with labeled sides.

About Triangle Area Calculation

This calculator finds the area of a triangle using Heron's formula, which is especially useful when you know the lengths of all three sides. Heron's formula states that the area of a triangle with sides of lengths a, b, and c can be calculated using the semi-perimeter s, where s = (a+b+c)/2. The formula is: Area = √[s(s-a)(s-b)(s-c)].

To use the calculator, simply enter the lengths of the three sides of your triangle in the input boxes. Ensure that the sum of any two sides is greater than the third side to form a valid triangle. Click 'Calculate Area' to find the area, and 'Reset' to clear the inputs. The result can be easily copied to your clipboard.

This tool is helpful for students, educators, and anyone needing to quickly calculate triangle areas in geometry, construction, or design.