• Rectangular Area with Price Per Unit Mass

Let’s say I want to fill a rectangular lawn that is 2 ft wide, 3 ft long and 10 inches (0.83 ft) deep.

Let’s also say that the selected soil is sold for $0.1 per pound.

The calculator would perform the following calculation:

$$Volume=Length\times Width\times Depth=3\times 2\times 0.83=5f{t}^3$$

I would then enter the price of 0.1$/pound and calculate the cost at $44.50.

• Circular Area with Price Per Unit Volume

Let’s say I have a circular lawn with a diameter of 12 feet at a depth of 3 feet.

Let’s also say that soil costs $0.1 per cubic feet purchased.

The calculator would do the following calculation:

$$Area=\pi \times (\frac{Diameter}{2}{)}^2=\pi \times (\frac{12}{2}{)}^2=113.097f{t}^2$$

$$Volume=\pi \times (\frac{Diameter}{2}{)}^2\times Depth=113.097\times 3=339.292f{t}^3$$

I would then enter the price per unit volume of 0.1 $/cubic feet and calculate the cost at $33.93