Use this triangle area calculator to quickly calculate triangle area when you know the base and height. The tool also demonstrates the triangle area formula in practice.
A = area of the triangle
b = base
h = height
The triangle area formula multiplies the base by the height and divides by 2 to get the area.
| Base | Height | Area |
|---|---|---|
| 4 | 3 | 6 |
| 5 | 2 | 5 |
| 10 | 5 | 25 |
| 8 | 6 | 24 |
| 12 | 9 | 54 |
If you want to understand how to calculate triangle area manually:
1. Measure the base of the triangle.
2. Measure the height perpendicular to the base.
3. Multiply base by height.
4. Divide by 2.
This is the simplest way to apply the triangle area formula without using a calculator.
This triangle area calculator instantly computes the area using the triangle area formula. Enter the base and height to see the result up to six decimal places.
It works on desktop and mobile devices and is useful for students, teachers, engineers, and anyone learning how to calculate triangle area.
• The sum of interior angles in any triangle is 180°.
• Triangles are the strongest shape used in construction and engineering.
• Equilateral, isosceles, and scalene are the main triangle types.
• The area formula can be adapted for right, acute, or obtuse triangles.
• Triangles are widely used in art, architecture, and geometry problems.