# How to Calculate Area of Irregular Shape in Excel (3 Easy Methods)

To illustrate the calculations, we will use the sample dataset below.

### Method 1 – Determine Area of Irregular Shape by Simple Calculation in Excel

STEPS:

• Select cellÂ E5.
• Enter the formula:
`=C5*D6`
• PressÂ Enter.
• AutoFill tool till theÂ 4th vertex.
• You’ll get the output as shown in the image.

• In cell E9, enter the formula:
`=C9*D5`
• Press Enter.

• Select cellÂ F5Â and enter the formula:
`=D5*C6`
• Press Enter and AutoFill till the 4th vertex.

• In cellÂ F9, enter the formula:
`=D9*C5`
• Press Enter.

• AutoSum cellsÂ E10Â andÂ F10.
• It returns the sum of the respective columns.

• In cellÂ D12, enter the formula:
`=ABS(E10-F10)/2`
• PressÂ Enter to get the area of the irregular shape.

### Method 2 – Insert Excel SUMPRODUCT Function to Calculate Area of Irregular Shape

STEPS:

• In cellÂ E5, enter the formula:
`=SUMPRODUCT(C5:C9,D6:D10)`
• Press Enter to return the output.

• Select cellÂ F5, and enter the formula:
`=SUMPRODUCT(D5:D9,C6:C10)`
• Press Enter.

• In cellÂ D12, enter the formula:
`=0.5*ABS(E5-F5)`
• PressÂ EnterÂ to return the output.

### Method 3 – Create Array Formula in Excel for Computing Irregular Shape Area

STEPS:

• Select cell D12, enter the formula:
`=0.5*ABS(SUM(C5:C9*D6:D10-D5:D9*C6:C10))`
• PressÂ Enter to get the Irregular Shape Area.

How Does the Formula Work?

• C5:C9*D6:D10

Cells in the rangeÂ C5:C9Â get multiplied by cells in the rangeÂ D6:D10.

• D5:D9*C6:C10

Cells in the rangeÂ D5:D9Â get multiplied by cells in the rangeÂ C6:C10.

• SUM(C5:C9*D6:D10-D5:D9*C6:C10)

TheÂ SUMÂ function totals the output ofÂ C5:C9*D6:D10-D5:D9*C6:C10.

• 5*ABS(SUM(C5:C9*D6:D10-D5:D9*C6:C10))

The absolute value of theÂ SUMÂ function output is multiplied byÂ .5.

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Aung Shine

Aung Shine completed his bachelorâ€™s in Electrical and Electronics Engineering from Bangladesh University of Engineering and Technology. It has been almost 2 years since he joined SOFTEKO and actively working on the ExcelDemy project. Currently he works as a Team Leader where he guides his team members to create technical content. He has published 150+ articles and reviewed 50+ articles. He has also solved various user problems before. He has interests in Data Analysis, Power Query, Advanced Excel,... Read Full Bio

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