How do you calculate cubic feet? - Office Equipment & Supplies

How it Works

Stone and Mulch Calculators

As an example, let's use 500 square feet to be mulched at a
3" depth.

1. First, the depth must be converted to feet. To convert inches to feet, simply divide inches by 12, the number of inches in a foot.
   
   So for our example: 3 inches divided by 12 equals a 0.25 foot depth.
2. Now that we have the depth in feet, we can multiply the depth by the area.
   
   So for our example: 0.25 foot depth times 500 square feet equals 125 cubic feet.
3. If you are calculating 0.5, 2, or 3, cubic foot bags, simply divide 125 cubic feet by the size of the bag.
   
   So for our example: if we are using 2 cubic foot bags, we can divide 125 cubic feet by 2 which equals 62.5 bags.
4. If you are calculating cubic yards, we need to convert 125 cubic feet to cubic yards by dividing by 27. One cubic yard is equal to 27 cubic feet, see the diagram below.
   
   
   
   So for our example: 125 cubic feet divided by 27 equals 4.63 cubic yards.

For Your Information

• 1 inch equals 0.08333 feet
• 1.5 inches equals 0.125 feet
• 2 inc

Use a Tape Measure:
Measure the Length, Width & Depth of the inside or outside and use this to calculate the cubic feet or meters.

It's a rectangle, so it's far easier than a circle.

http://www.autocalculator.org/Calculators/Cubic-feet-formula.aspx#.VsvxQzY0nXE

Calculator
Cubic Feet Calculator

1. Calculate
   • Calculate your area (see below)
   • Calculate your volume; Multiply area times the depth, this will be volume in cubic feet
   • Calculate your cubic yards; Divide cubic feet by 27 to convert to cubic yards and this is your answer.
   • Where (ft2) = square foot, (ft3) = cubic foot, (yd3) = cubic yard
2. Google
3. or i'll do it 66 and 2/3 cu Yds

Square feet is calculated L x W so 10x10 would be 100 sq. feet, Cubic feet is calculated by L x W x H so 15 x 14 x 9 = 1890 cubic feet

Multiply 21 inches by 14 inches by 10 inches to get 2940 cubic inches. There are 12 inches in a foot, so there are 12^3=1728 cubic inches in a cubic foot. Divide 2940 cubic inches by 1728 cubic inches per cubic foot to get about 1.7 cubic feet.

Alternatively, first convert all measurements to feet. 21 inches is 1 3/4 feet, 14 inches is 1 1/6 feet, 10 inches is 5/6 feet. Multiply them together to get 245/144 cubic feet, which again is about 1.7 cubic feet.

It's always nice when doing a problem two different ways gives the same answer.

One foot is 12 inches, so 8 feet times 2 feet times 5/12 feet is 6 2/3 cubic feet (about 6.67 cubic feet).

What unit are the numbers in?
40 feet by 45 feet by 5 feet is 9000 cubic feet.
If the numbers are in inches then the volume is about 5.2 cubic feet.
If the numbers are in meters then the volume is about 317,832 cubic feet.

How thick do you want the mulch? The planter is 24 feet by 18 feet or 432 square feet. If you want mulch one foot deep then you need 432 cubic feet. For two feet, 864 cubic feet. For mulch one inch deep, 36 cubic feet.