## Summary

To calculate the area of a triangle in Excel, you can use the standard formula, adapted with Excel's math operators. In the example shown, the formula in C5, copied down, is:

``````=(B5*C5)/2
``````

which calculates the area of a triangle given height from column B and base from column C.

## Generic formula

``=(b*h)/2``

## Explanation

In geometry, the area enclosed by a triangle is defined by this formula:

where b represents the base of the triangle, and h represents the height, measured at right angles to the base. In Excel, the same formula can be represented like this:

``````A=b*h/2
``````

So, for example, to calculate the area of a triangle with a base of 4 and a height of 3:

``````=4*3/2 // returns 6
``````

In the example shown, the goal is to calculate the area for eleven triangles with base given in column B and height given in column C. The formula in D5 is:

``````=(B5*C5)/2
``````

As this formula is copied down the table, it calculates a different area at each new row.

Note: The parentheses in this formula are optional and for readability only. In Excel's order of operations, multiplication will occur before division, so the parentheses are unnecessary. Author ### Dave Bruns

Hi - I'm Dave Bruns, and I run Exceljet with my wife, Lisa. Our goal is to help you work faster in Excel. We create short videos, and clear examples of formulas, functions, pivot tables, conditional formatting, and charts.