Knowing how to calculate the square feet of an box or other object is very beneficial in many situations. You might need to know how many boxes can fit in a room and will need to calculate the square feet of the room and the boxes themselves to deduce the answer. Houses are frequently priced based on the square-footage of the interior. Once you know how to calculate the square feet of an area you can apply it anywhere as the formula is the same for any calculation of square area.

Measure one side of the box with yardstick or measuring tape. Write this number down.

Measure the other side of the box in the same manner, writing this number down as well.

Multiply the two numbers together to get the square inches. For example, a box with a 4-inch side and a 6-inch side would have 6x4 square inches, or 24 square inches.

#### Tip

Apply any conversions that need to be made to the numbers, for instance the conversion of inches to centimeters, to the input numbers instead of the final product for consistency.

There are 12 inches in every foot. Therefore, if you need to calculate the square inches instead of square feet, you simply take your initial dimensions (in feet) and multiply them by 12. Likewise, to convert inches to feet, you will need to divide your initial dimensions by 12.