How do you calculate the area of a triangle? To calculate the area of a triangle, multiply the height by the width (this is also known as the 'base') then divide by 2.

Learn how to calculate the areas of rectangle, triangle, and circle in Excel for a single cell or range of cells usin this formula.

A triangle is a closed shape with three sides and three vertices. The general formula to calculate the area of a triangle is half of the product of its base and height.