### Things You'll Need

Tape measure

Calculator

Concrete is a necessary item for many home improvement projects. Whether you're pouring a driveway or a pool deck, one of the first things you'll need to know is how much concrete you're going to need to complete the job. In order to figure square feet for a concrete project, you only need to perform a few simple calculations.

## Step 1

Measure the length and width of the area you plan to pour concrete over.

## Step 2

Multiply the length times the width for square footage. For instance, if you plan to pour a concrete driveway that will be 25 feet long and 12 feet wide, the square footage would be 300 square feet.

## Step 3

Measure all the sides for an area that isn't shaped like a rectangle or square.

## Step 4

Draw a scale drawing of the area on graph paper.

## Step 5

Section the drawing into rectangles, squares and triangles.

## Step 6

Find the area of each section. For squares and rectangles, multiply length times width. For triangles, multiply base times height and divide the product by 2.

## Step 7

Add the area of each section to find the total area.

## Step 8

Convert the thickness of your concrete into feet by dividing inches by 12. For instance, if you want your driveway to be 4 inches thick, divide 4 by 12 to get 0.333 feet of concrete.

## Step 9

Multiply the area by the thickness. For this example, multiply 300 times 0.333 to get 99.9 cubic feet of concrete.

## Step 10

Convert the cubic feet into cubic yards, since that's how concrete is usually measured. Do this by dividing by 27 (3 feet by 3 feet by 3 feet). The equation would look like this: 99.9 / 27 = 3.7 cubic yards

You would need 3.7 cubic yards to pave a 4-inch thick driveway that's 25 feet long and 12 feet wide.