To calculate the area of a rectangle in Excel, you need to multiply the length with height. That being said, use this formula: =<cell with length>*<cell with height>.

Area: Area is the amount of space inside a two-dimensional shape, usually measured in square units. Rectangle: A rectangle is a simple four-sided shape with two pairs of parallel sides.

Revise how to calculate the area of a triangle. Learn how to calculate the triangle's area by first finding the area of a rectangle in this BBC Bitesize maths guide.