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

Area of Triangle Formula Area of a triangle is half the product of its base and height. Therefore, to calculate the area of a triangle, one should have its base and height measurements.

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.