Area of a Hole Calculator - Calculate Circular and Rectangular Hole Area Easily

Last updated: 05 Jul 2025 | Author: Brij | Review By: Irshad

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Find the area of circular or rectangular holes. Simply enter the dimensions and get accurate results in square inches or feet.

Hole Shape:

Diameter:

Area Calculation Results

Area:

Common Uses: Calculate hole area for material estimation, landscaping, or construction projects.

Whether you're working on a woodworking project, construction layout, plumbing, or sheet metal fabrication, accurately knowing the area of a hole is crucial for material planning and design efficiency. This calculator helps you find the area of both circular and rectangular holes in seconds.

What is the Area of a Hole?

The area of a hole refers to the 2D surface that is removed or cut out of a material. Depending on the shape of the hole—circular or rectangular—the formula to calculate the area will differ.

1. Circular Hole Area

To calculate the area of a circular hole, use the formula based on its diameter (D):

Formula:

$\text{Area} = \pi \times \left(\frac{D}{2}\right)^2$

Where:

$D$ = Diameter of the hole

Example (Circular Hole):

Diameter = 10 inches

$\text{Area} = \pi \times \left(\frac{10}{2}\right)^2 = \pi \times 25 \approx 78.54 \text{ square inches}$

2. Area of a Rectangular Hole

To calculate the area of a rectangular hole, use the formula:

$\text{Area} = \text{Length} \times \text{Width}$

Where:

Length and Width are the sides of the rectangle.

Example (Rectangular Hole):

Length = 10 inches
Width = 8 inches

$\text{Area} = 10 \times 8 = 80 \text{ square inches}$

Why Use This Calculator?

Helps estimate material to be removed or filled
Ideal for engineers, DIYers, metal fabricators, and construction workers
Saves time on manual calculations
Reduces cutting and design errors

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Area of a Hole Calculator - Calculate Circular and Rectangular Hole Area Easily

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