Cubic feet
64
Free volume tool
Cubic Feet Calculator
Calculate cubic feet for boxes, rooms, and cylinders, then convert the result into cubic yards, cubic meters, liters, and gallons.
Volume calculator
Cubic feet inputs
ft3, yd3, m3, liters
Cubic yards
2.37
Cubic meters
1.8123
Liters
1,812.28
Related measurement tools
Concrete Calculator
Work out slab, footing, and column volume for concrete pours.
Gravel Calculator
Figure out gravel volume, depth, and tonnage for paths or pads.
Room Size Calculator
Measure room dimensions, usable area, and layout planning totals.
Square Footage Calculator
Calculate total square footage for simple and multi-room plans.
Sand Calculator
Estimate sand volume, weight, and bag count for bedding, fill, and site prep.
Weight Converter
Convert kilograms, pounds, ounces, grams, stone, and tons in one practical tool.
What is a cubic feet calculator?
A cubic feet calculator is a volume tool used to measure three-dimensional space in cubic feet. It helps you estimate how much space a box, room, bin, truck bed, or container can hold by converting dimensions into a volume value. In simple cases, that means multiplying length × width × height. For other shapes, such as cylinders, the formula changes but the goal stays the same: find the total interior volume.
This kind of calculator is useful because cubic feet is a practical unit for storage, moving, construction materials, and household capacity checks. It is also easy to convert into related units such ascubic yards, cubic meters,liters, and gallons, which makes it easier to compare material deliveries and container capacity across different use cases.
Why cubic feet is useful in real planning
Cubic feet is commonly used when you need to estimate material volume rather than flat area. It shows up in dumpster sizing, refrigerator capacity, moving boxes, room volume, storage bins, and bulk material estimates for gravel, mulch, soil, and some concrete planning. In all of these cases, surface area alone is not enough because depth or height changes the result completely.
It is also useful because many projects start in one unit and end in another. A supplier may quote mulch in cubic yards, a plan may show dimensions in feet, and a container spec may list liters or gallons. A good cubic feet calculator helps bridge those systems quickly so you can plan storage, delivery, and purchasing with fewer mistakes.
How the calculator works
The most common formula is for a rectangular space: volume = length × width × height. If you already know the floor area, you can also convert square feet to cubic feet by multiplying the area by the height. For cylinders, the calculator uses the circle formula first and then multiplies by height: π × radius² × height.
Rectangular spaces
Use length, width, and height to calculate the cubic footage of a box, room, or bin.
Area-based conversion
If you already know the square footage, multiply by height to convert square feet to cubic feet.
Cylindrical spaces
For cylinders, the tool finds the circle area using the radius, then multiplies by height or depth.
Unit conversion
The result can be converted into cubic yards, cubic meters, liters, and gallons for easier planning.
Common conversions people expect
| From | To | Why it matters |
|---|---|---|
| Cubic feet | Cubic yards | Bulk material deliveries are often quoted in cubic yards. |
| Cubic feet | Cubic meters | Useful when comparing metric plans or supplier specs. |
| Cubic feet | Liters | Helpful for container volume and liquid-equivalent capacity. |
| Cubic feet | Gallons | Common for tanks, bins, and liquid storage comparisons. |
One of the most common conversions is from cubic feet to cubic yards. Since one cubic yard equals 27 cubic feet, you divide the cubic-feet result by 27 to get the equivalent yardage.
How to use this cubic feet calculator
- 1
Choose the shape
Use the rectangular option for boxes, rooms, and bins, or the cylindrical option for tanks and round containers.
- 2
Enter dimensions
Add length, width, and height for box-shaped spaces, or radius and height for cylindrical spaces.
- 3
Review the volume
Check the total cubic-feet result to understand how much space or material volume is involved.
- 4
Compare converted units
Use the converted values in cubic yards, cubic meters, liters, or gallons depending on your project.
Real-world uses and limitations
Storage and moving
Useful for estimating room volume, storage bins, refrigerators, and moving boxes.
Bulk materials
Helpful for mulch, gravel, soil, fill, and some concrete planning where volume matters more than flat area.
Unit comparison
Makes it easier to move between cubic feet, cubic yards, cubic meters, liters, and gallons.
Know the limits
Irregular shapes may need to be broken into smaller sections before the volume estimate becomes reliable.
The calculator works best when the shape can be described clearly. A simple box, room, dumpster, or cylinder is straightforward. More irregular containers may need to be split into simpler shapes and then added together. That is often the best way to turn real-world spaces into a usable cubic-feet estimate.
Frequently asked questions
- How do I calculate cubic feet for a box?
- Multiply length by width by height, using feet for each dimension.
- How do I convert square feet to cubic feet?
- Multiply the square-foot area by the height to get cubic feet.
- Why convert cubic feet to cubic yards?
- Many bulk materials are sold in cubic yards, so converting helps with ordering and delivery planning.
Use this cubic feet calculator for faster volume planning
This cubic feet calculator helps you estimate volume for containers, rooms, storage, and bulk materials without doing the formulas by hand. Enter the dimensions above, review the cubic-feet result, and compare it instantly in cubic yards, cubic meters, liters, and gallons.