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But what do we do if the dimensions are expressed in units other than feet — like yards, inches, or even centimeters and meters? If you're wondering how much sand will fit into a rectangular sandbox or how much gravel your driveway needs.
After converting the units, you'll have all of the dimensions in feet, so a simple multiplication will give us the result in cubic feet. If you're curious about how much space your suitcase takes up, so you'll know if it fits in your trunk. end{split} Volume[in] 3 ∴ Volume[ft] 3 = 30 in × 36 in × 25 in = 27 , 000 in 3 = Volume[in] 3 /1 , 728 = 27 , 000 in 3 /1 , 728 = 15. And there we go, we've found the required volume of soil in cubic feet — 405 ft 3 405\ \text{ft} There are also situations where we want to cover a triangular, trapezoidal, circular, or circle sector area.In the paragraphs below, you can read about how to calculate cubic feet from inches or from your favorite length unit. One cubic foot is a volume that fills a 1 ft × 1 ft × 1 ft 1\ \text{ft} \times 1\ \text{ft} \times 1\ \text{ft} 1 ft × 1 ft × 1 ft cubic container. How much water will fill up your aquarium or pool(although gallons are used more often than cubic feet in those cases). Calculating cubic feet" is a simplified way of saying that we need to find the volume of an object in cubic feet.
If you are dealing with a different unit for each dimension, we recommend using the first method to avoid miscalculations.g. cubic feet of a cylinder calculator (or a cone, or a sphere), check out our volume calculator, which covers the most common three-dimensional solids. In that case, you can try dividing the area into a couple of rectangles and calculating their areas separately before summing them up.