An introduction to Finding Volume in Cubic Feet

The cubic feet measurement is a vital concept when it comes to understanding the volume of a space or object. Cubic feet represent the volume of three-dimensional shapes where each dimension has a measurement of one foot. It measures the capacity of containers, rooms, and other spaces.

Knowledge of how to calculate cubic feet is helpful because it allows you to determine the available space for storage or other purposes. In this article, we will discuss the measurement of cubic feet with its formula. We will explore the significance of cubic feet in our daily life. We will practice some cubic feet problems to understand this topic better.

What are cubic feet? 

Cubic feet are measuring units used to determine the volume of an object. It is widely used to calculate the capacity of containers like boxes or barrels. Cubic feet can use to measure how much gas or liquid is in a container. To calculate cubic feet, determine an object’s length, width, and height, then multiply these three values. 

We use the “ft3” or “cu ft.” unit to represent cubic feet in mathematics. Cubic feet are a common unit of volume in both the United States and the United Kingdom. This unit is widely used to measure the volume occupied by objects in these countries.

The formula for cubic feet measurement 

The formula to calculate cubic feet is given below:

Volume in Cubic feet = length × width × height 


  • The length is the measurement of the longest side of the object. 
  • The width of an object is the dimension that is perpendicular to the length
  • Height refers to the dimension of an object, which is perpendicular to both its length and width. 

How to calculate volume in cubic feet (ft3)?

Follow the following steps to calculate cubic feet:

  1. Find out the object’s length, width, and height in feet. If the dimensions are measured in other units, convert them to feet before proceeding with the calculation.
  2. Take the measurement of the length, width, and height and multiply them all together. i.e. length × width × height 
  3. The result is the volume of the object or space in cubic feet (ft3).


You can take help from online tool like a cu ft calculator to find the volume in cubic feet in seconds.

Basic Conversion of units

The following table shows how to change other units of measurement into feet. 

Measurement unitConversion to feetMeasurement unitConversion to feet
InchDivide by 12CentimeterDivide by 30.48
yardMultiply by 3MeterMultiply by 3.281 
MileMultiply by 5289KilometerMultiply by 3281

It is not necessary to convert other units into feet before applying the formula. We can convert cubic units after the final calculation.  

The following table shows how to change other cubic units into cubic feet. 

Cubic unitConversion to cubic feetCubic unitConversion to cubic feet
Cubic InchDivide by 1728Cubic CentimeterDivide by 28316.8466
Cubic yardMultiply by 27Cubic MeterMultiply by 35.3147 
Cubic MileMultiply by 147,197,952,000Cubic KilometerMultiply by 35,314,666,720

These conversation factors will allow you to convert volume measurements in these cubic units into cubic feet.

Importance of cubic feet in our daily life

Cubic feet play a crucial role in our daily life. Here are some key reasons why understanding cubic feet is significant:

  • Space planning and interior design: How much space there is, determine how much furniture and other things can fit inside a room. When you know how big a room is, you can plan what to put inside so everything fits efficiently and does not make the room too full. 
  • Home improvement: If you want to improve or change your home by adding something, it is essential to know about cubic feet. It helps you know exactly how much paint, flooring, wallpaper, lumber, or concrete you need for your project. 
  • Energy Efficiency: Cubic feet use in assessing air conditioning systems’ cooling or heating capacity. By understanding the cubic footage of space, the proper size of HVAC (Heating, Ventilation, and Air conditioning) systems can be determined, leading to improved energy efficiency and cost savings.
  • Packaging and Shipping: Companies involves in packaging and shipping goods rely on cubic feet to optimize their logistics. Calculating the volume of packages helps determine appropriate box sizes and shipping container capacity.
  • Manufacturing and Industries: In various industries, such as construction, manufacturing, and logistics, understanding cubic feet is crucial for production planning, material management, and inventory control. It enables businesses to accurately estimate quantities, plan storage capacities, and optimize production processes. 

Some Solved Examples of Cubic Feet

Let us solve some examples to gain a better understanding of cubic feet.

Example 1.

Imagine a rectangular swimming pool that measures 10 feet in length, 6 feet in width, and 4 feet in height. Determine the volume in cubic feet of this swimming pool. 



Length = 10 ft, Width = 6 ft, Height = 4 ft

Write the formula to calculate the volume of a swimming pool in cubic feet, i.e. 

Volume = Length × Width × Height 

As all the given dimensions have been measured in feet. So put the given values into the cubic feet formula. 

Volume in cubic feet = 10 × 6 × 4 = 240 ft3

Example 2.

A student has a box with a length of 8 inches, a width of 6 inches, and a height of 4 inches; calculate the volume of this box in cubic feet.


To calculate the volume of the box in cubic feet, we need to convert the measurement from inches to feet and then use the formula for volume. 


Length = 8 inches

Width = 6 inches 

Height = 4 inches 

Since there are 12 inches in a foot, we will divide each number by 12 to convert the measurement to feet. 

Length (in feet) = 8 / 12 = 0.667 feet

Width (in feet) = 6 / 12 = 0.5 feet

Height (in feet) = 4 / 12 = 0.333 feet

∴ Volume = Length × Width × Height 

Volume in cubic feet = 0.667 × 0.5 × 0.333 = 0.111 ft3

Hence, the volume of the box is 0.111 ft3


In this article, we have discussed cubic feet, a volume measurement unit. To find the volume in cubic feet, we analyzed the formula of cubic feet. We talked about the method of finding the cubic feet. We covered the conversion of another unit. We examined its importance in our daily life. We did some practice questions to get a better grasp on this topic.