# How to Figure out the Square Footage of a Circular Driveway
Although most single-family homes have a straight driveway that runs up to their house or alongside it, some homeowners have enough room for a circular driveway. If you have such a driveway and want to repave it, you will need to know its square footage for estimating the repaving costs. To determine the square footage, you need to know the diameter, which is the distance from one side of the driveway to the other, passing through the center.
Things You'll Need
- Measuring tape
Instructions
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1
Measure the diameter of your circular driveway with a measuring tape marked in feet. Since your driveway is a circle, any measurement taken from one side to the other, through the center, will be equal.
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2
Divide the diameter of your circular driveway by two to find the radius. For example, if your circular driveway has a diameter of 16 feet, divide 16 by 2 to get an 8-foot radius.
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3
Multiply the radius by itself. In this example, multiply 8 feet by 8 feet to get 64 square feet.
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4
Multiply the result in Step 3 by pi -- 3.14 -- to find the square footage of your circular driveway. In this example, multiply 64 by 3.14 to find the square footage of your driveway that equals 200.94 square feet.
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Paving
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