wood cft calculator

Wood CFT Calculator

Required Inputs
Thickness (in): See note 2.
Width (in): Ex: 8 1/4 or 8.25
Length (in): Ex: 8 ft. = 96 in.


Board Feet:
Total Board Feet:

 Why on earth lumber calculations had to be so tricky!! 

First you have to deal with a linear foot. Once you grasp the topic, you are presented with the calculation of cubic feet or linear feet calculations. Life of a homeowner would have become immensely easy if only the lumber market upheld and followed one system of measurement of lumber. Why it doesn’t do so? It’s because woodworkers use different widths and thicknesses for different projects. So, the lumber industry couldn’t rely on straightforward linear foot to communicate the volume of wood that is being purchased or sold.

Okay, enough about the theory. Let’s dive into to detail of the measurement, cubic feet, and of wood cft calculator.

What can Wood CFt Calculator Do for You?

If you are in the market buying lumber for your decking project, you would agree that there is no universal measurement to follow for the volume of wood. Sometimes, you deal in linear feet. At other times, you have to start from scratch to learn how to calculate cubic feet of wood.

This learning exercise may seem daunting. But if you are using a reliable wood cft calculator, this calculation should be as 1-2-3.

This wood measurement calculator takes standalone measures of length, width, and thickness of the wood and converts them into a measure of volume, cubic feet. Then, you can relay this piece of information to your lumber supplier for ordering.

It is noteworthy that a cubic feet is different from another commonly used measure of lumber, board feet. While a board foot is equivalent to a lumber plank which is one foot long, one foot wide, and one inch high, cubic feet takes different dimensions.

The best portrayal of a cubic foot is a plank that takes foot on all three sides of height, width, and length. In simpler words, cft means a wood size which is equivalent to 12 board feet.

How does This Tool Work?

This cft calculator for wood asks the users to insert information including the project’s anticipated height, width, and length. Once this information is inserted, this wood size calculator uses the wood calculation formula to calculate needed cubic feet.

Who can Use This Tool and When?

You wouldn’t need this tool much if you are trained in woodworking as a profession. In case, you have spent years or months working on decking projects (or on other flooring and construction works, you would find that cft calculation for wood log comes naturally to you.

Unfortunately, naïve woodworkers would not agree with your perception of this calculation. Beginner woodworkers and DIY loving homeowners are two classes who benefit from wood cft calculator the most.

They use timber calculator cubic foot measurement immediately before placing an order with the lumber supplier. Before using this wooden calculator, however, users should evaluate the height, width, and length of their project’s wood needs.

Finish your wood projects the right way with the best oil-based wood preservatives.

Wood CF Calculation Formula

If you want to check the accuracy of the wood cft calculator before proceeding or if you decide to ditch the calculator altogether, you can do the calculation yourself.

The wood calculation formula to know cubic feet needs is as follows:

Cubic feet = Height (in feet) x Width (in feet) x Length (in feet)

If you want to use inches for width and height, the formula will become:

Cubic feet = Height (in inches) x Width (in inches) x Length (in feet) / 144

Once you have calculated the cubic feet lumber requirement of your project, you can multiply this value with the per cubic foot price of lumber to get the total wood cost of the project.

Here is the formula to calculate total wood cost from cubic feet:

Total cost of project = Cubic feet x cost per cubic foot

Example Calculations

We can see that although the measurements and their conversions are confusing, the formula and calculator tool is quite straightforward. All you need are a few simple and easy-to-take measures.

Here is how you can proceed with the calculation of cubic feet of your project.

You start with evaluating the height, width, and length of your project. Suppose, these measures are 12 feet deep, 15 feet wide, and 3 inches thick.

You can now use the formula (or tool) to get cubic feet measure:

Cubic feet = Height (in feet) x Width (in feet) x Length (in feet)

= 3 inches x 144 inches x 15 feet /144

= 45 ft3

Now you know the wood volume you want for your project. The subsequent calculation is easy. Suppose, you have talked to the lumber supplier and he quoted a rate of $30 for every cubic foot. You can calculate the total lumber cost by simply multiplying the rate with the feet you have calculated. The calculation is as follows:

Total cost of project = Total cubic feet x cost per cubic foot

= 45 cubic feet x $30

= $1350

This way, you can calculate your project’s costs with a couple of simple calculations.

Don’t forget to preserve your wooden project with the best wood preservatives.


Wood cft calculator and similar tools are great in helping beginner woodworkers in navigating the lumber market. The best thing about these tools is that they don’t require much technical knowledge and are easy to understand.

So, if you are a homeowner with no interest and experience in woodworking or property management, these tools allow you to understand the jargons your contractor is using. You may build on the knowledge and insight offered by these tools to take the matter in your hands and do the whole planning and execution steps of installation and renovation.

These tools also allow you to calculate the cost of lumber you will incur for the whole process.  In short, these tools make your communication a lot easier. But to make this communication easy, you first have to understand what these tools are taking and what results they are calculating. For example, you should have an understanding of the difference between different measurement systems and knowledge to proceed towards cost calculation given one or another measurement is missing.

Scroll to Top