The Octagon Planter Volume calculator computes the volume (V) of an octagon planter based on the length of the sides (s) and the height (h) (see diagram).
INSTRUCTIONS: Choose units and enter the following:
Volume (V): The calculator returns the volume in cubic feet. However, this can be automatically converted into other volume units via the pull-down menu next to the answer. The calculator also returns the number of soil bags of the following sizes:
IMPORTANT NOTE: To compute the amount of soil needed in the planter, use the interior dimensions of the container, and use the top diameter associated with how high you want to fill the container. If you wish to fill to the brim, it is the full inner height.
The Octagon Planter formula calculates the volume of a octagon shaped planter. Enter the length of a side of the planter (s) and the (h) height of the interior of the container (see diagram), then this formula will provide the volume of the container. This answers the following questions:
If you do not intend to fill the container to the top, this formula will over estimate unless you use a height (h) that matches your expected top surface inside the container. Unless it's a very large container, and/or you are only using a small portion of the container, the overage should be small.
The Garden Soil Price Survey information is as follows:
The Pricing Data can be used the thecalculator.