Cubic Feet Calculator
Turn length, width and height into cubic feet, cubic yards and cubic metres.
Whether you're pricing a load of soil, sizing a shipment, or checking how much a container holds, volume is the number you need — and it's easy to get wrong when your measurements are in mixed units. This calculator takes a length, width, and height in feet, inches, centimetres, or metres and returns the volume in cubic feet, cubic yards, and cubic metres at once. Everything is worked out in your browser.
How the volume is calculated
Volume for any rectangular, box-shaped space is the product of its three dimensions. The calculator first converts whatever unit you choose into feet, then multiplies:
Cubic feet = Length × Width × Height (all in feet)
To handle other units it scales each measurement first — inches are divided by 12, centimetres by 30.48, and metres are multiplied by 3.28084 — so you can enter dimensions in the units you actually measured in without converting by hand. The cubic-yard figure is the cubic feet divided by 27 (there are 27 cubic feet in a cubic yard), and the cubic-metre figure is the cubic feet divided by 35.3147.
Choosing the right unit for the job
Different trades quote in different units, which is why all three appear together. Cubic yards are the standard for bulk landscaping and construction materials like soil, mulch, gravel, and ready-mix concrete in the United States, so that's the figure to take to a supplier. Cubic feet suit shipping, storage, and appliance capacities. Cubic metres are the metric standard used almost everywhere else. One caveat: this measures a simple rectangular box, so for irregular shapes, break the space into rectangular sections, calculate each, and add the results together.
Frequently Asked Questions
Can I mix units, like feet for length and inches for height?
Not in one calculation — the tool applies a single unit to all three dimensions. Convert your measurements to a common unit first, then enter them with that unit selected.
How many cubic feet are in a cubic yard?
Twenty-seven. A yard is three feet, and three cubed is 27, so the calculator divides the cubic-feet result by 27 to give cubic yards — the unit most bulk material suppliers use.
What about an irregular or L-shaped space?
Split it into rectangular blocks, calculate the volume of each separately, and add them up. This tool computes the volume of one rectangular box at a time.
Is anything I enter saved?
No. The calculation runs in your browser and nothing you type is uploaded or stored.