Cubic Feet Calculator – Calculate Cubic Feet Easily
Use this free cubic feet calculator to quickly calculate the volume of a box, room, container, furniture, soil, mulch, concrete, wood and other materials in cubic feet (ft³).
Enter the length, width and height below to calculate cubic feet instantly. You can use inches, feet, centimeters or meters depending on your measurement.
📐 Cubic Feet Calculator
What Is a Cubic Foot?
A cubic foot is a unit of volume equal to the space inside a cube measuring 1 foot long, 1 foot wide and 1 foot high. It is commonly used to measure rooms, boxes, storage containers, appliances, building materials and shipping volume.
How to Calculate Cubic Feet
To calculate cubic feet, multiply the length by the width and then multiply the result by the height. All three measurements should be converted to feet before using the standard formula.
Cubic Feet Formula:
Length × Width × Height = Cubic Feet
Example: Calculate Cubic Feet
Suppose a box is 5 feet long, 3 feet wide and 2 feet high:
5 × 3 × 2 = 30 cubic feet
Therefore, the volume of the box is 30 cubic feet.
Cubic Feet Calculator With Inches
If your measurements are in inches, divide each measurement by 12 to convert inches to feet before calculating the volume.
For example, a box measuring 24 × 18 × 12 inches is:
(24 × 18 × 12) ÷ 1,728 = 3 cubic feet
Our calculator automatically handles inches, so you do not need to perform the conversion manually.
Cubic Feet Calculator for a Box
A box is one of the easiest shapes for calculating volume. Enter the length, width and height of the box into the calculator above.
The result can be useful for storage planning, moving, shipping and estimating the space required for an item.
Cubic Feet Calculator for a Cylinder
For a cylindrical object, the standard rectangular formula does not apply. The volume of a cylinder is calculated using the radius and height:
π × radius² × height
If the radius and height are measured in feet, the result will be in cubic feet.
Cubic Feet Calculator for Wood
A cubic feet calculator for wood can be useful when estimating the volume of lumber, timber and other wood materials.
For rectangular pieces of wood, multiply length × width × thickness after converting all measurements to feet.
Wood Volume Example
If a piece of wood is 8 feet long, 6 inches wide and 2 inches thick, convert the measurements to feet and then calculate the volume.
Cubic Feet Calculator for Soil
Gardeners and landscapers often need to calculate how many cubic feet of soil are required for a garden bed, planter or landscaping project.
Measure the length, width and depth of the area and multiply the three measurements.
Length × Width × Depth = Cubic Feet of Soil
How Many Cubic Feet of Soil Do I Need?
To estimate how much soil you need, first calculate the volume of your garden bed in cubic feet. Once you know the volume, you can compare it with the bag size or bulk soil quantity sold by your supplier.
Cubic Feet Calculator for Mulch
The same volume calculation can be used to estimate the amount of mulch required for a garden or landscaping area.
Measure the length and width of the area and multiply them by the desired mulch depth. Make sure all measurements are converted to feet.
Cubic Feet Calculator for Concrete
A cubic feet calculator for concrete can help estimate the volume required for slabs, footings, steps and other rectangular construction areas.
Calculate the length × width × depth of the area to determine the approximate volume in cubic feet.
Cubic Feet Calculator for Sand
To calculate the volume of sand needed for a rectangular area, multiply length × width × depth. Convert all measurements to feet before calculating cubic feet.
Cubic Feet Calculator for Gravel and Rock
The calculator can also be used to estimate the volume of gravel, rock and other bulk landscaping materials. Calculate the required volume first, then check the supplier's conversion from cubic feet to weight.
Square Feet to Cubic Feet Calculator
Square feet measure area, while cubic feet measure volume. To convert an area in square feet into cubic feet, you also need the depth or height.
Square Feet × Depth in Feet = Cubic Feet
Cubic Feet to Cubic Yards
One cubic yard contains 27 cubic feet. Therefore:
Cubic Feet ÷ 27 = Cubic Yards
For example, 54 cubic feet equals:
54 ÷ 27 = 2 cubic yards
Cubic Feet to Gallons
One cubic foot is approximately equal to 7.48052 US gallons.
Therefore:
Cubic Feet × 7.48052 = US Gallons
Cubic Feet to Litres
One cubic foot is approximately equal to 28.3168 litres.
Cubic Feet × 28.3168 = Litres
Cubic Feet Calculator for a Refrigerator
Refrigerator capacity is commonly shown in cubic feet. If you know the interior length, width and height, you can estimate the refrigerator's volume using the cubic feet formula.
For an actual appliance, manufacturer specifications are usually the best source because shelves, walls and irregular interior shapes can affect usable storage space.
Cubic Feet Calculator for Shipping
Shipping companies may use cubic feet to determine the volume occupied by a package or shipment. For a rectangular package, calculate:
Length × Width × Height
If measurements are provided in inches, convert the final cubic-inch volume to cubic feet by dividing by 1,728.
Cubic Feet Calculator for Moving
A cubic feet calculator for moving can help you estimate how much space furniture, boxes and household items may occupy. Calculate each rectangular item separately and add the volumes together for an overall estimate.
Cubic Feet Weight Calculator
Cubic feet measure volume, not weight. The weight of one cubic foot depends on the material's density. For example, one cubic foot of soil, concrete, wood and water will have different weights.
To estimate weight:
Weight = Volume × Material Density
Cubic Feet Calculator Dimensions
For the most accurate rectangular volume calculation, measure the object's:
- Length
- Width
- Height or depth
Make sure all three measurements use the same unit before applying the formula.
Why Use an Online Cubic Feet Calculator?
- Fast volume calculations
- Works with common measurement units
- Useful for boxes and containers
- Helpful for soil, mulch, concrete and sand estimates
- Useful for shipping and moving calculations
- Reduces manual calculation errors
- Easy to use on mobile devices
Cubic Feet Calculator – Quick Reference
| Calculation | Formula |
|---|---|
| Rectangular Volume | Length × Width × Height |
| Square Feet to Cubic Feet | Area × Depth |
| Cubic Feet to Cubic Yards | CF ÷ 27 |
| Cubic Feet to US Gallons | CF × 7.48052 |
| Cubic Feet to Litres | CF × 28.3168 |
| Cubic Inches to Cubic Feet | Cubic Inches ÷ 1,728 |
Frequently Asked Questions
How do you calculate cubic feet?
Multiply length × width × height after converting all measurements to feet.
How can I calculate cubic feet?
Use the formula length × width × height. You can also enter your measurements into the calculator above for an instant estimate.
How do I calculate cubic feet from inches?
You can divide each inch measurement by 12 to convert it to feet, or calculate cubic inches and divide the result by 1,728.
How many cubic feet are in a cubic yard?
There are 27 cubic feet in one cubic yard.
How many gallons are in a cubic foot?
One cubic foot is approximately 7.48052 US gallons.
How many litres are in a cubic foot?
One cubic foot is approximately 28.3168 litres.
Can I calculate soil and mulch in cubic feet?
Yes. Measure the length, width and depth of the area and multiply the measurements after converting them to feet.
Can I use this for concrete?
Yes. The calculator can estimate the volume of a rectangular concrete area. For actual construction quantities, allow for project-specific waste and conditions.
Can I calculate a refrigerator's cubic feet?
Yes. You can estimate the internal volume by multiplying its length, width and height. Manufacturer specifications are preferable for official capacity.
What is the difference between square feet and cubic feet?
Square feet measure two-dimensional area. Cubic feet measure three-dimensional volume and therefore require a depth or height measurement.
Can I calculate cubic feet for shipping?
Yes. For rectangular packages, calculate length × width × height and convert the dimensions to a consistent unit.
Final Thoughts
Whether you are measuring a box, room, refrigerator, garden bed, soil, mulch, concrete, wood, sand, gravel or a shipping package, calculating cubic feet is straightforward when the measurements are in the same unit.
Use the Cubic Feet Calculator at the top of this page to get your result quickly and avoid unnecessary manual calculations.
📐 Calculate Your Cubic Feet Now
Enter your length, width and height above and get your cubic feet result instantly.
Disclaimer: This calculator provides mathematical volume estimates for informational purposes. For construction, shipping, commercial or engineering decisions, verify measurements and requirements with the appropriate professional or supplier.
Comments
Post a Comment