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How to Calculate Compost Coverage in 3 Steps
Step 1: Calculate Square Footage
To calculate the square footage multiply the length by the
width of your garden.
Length x Width = Square Footage
Example: 20' x 40' = 800sq. feet
Step 2: Multiply Square Footage by Compost Inches
To figure out how many inches of compost to add to your
garden consult the aforementioned post How Much Compost to Add to the Garden.
Multiply the square footage of your garden by the number of inches you want to
add.
Example: 800 sq. feet x 1" = 800
Step 3: Divide by 12
Divide the product (total) from step 2 by 12. Doing this
figures out how much cubic feet of compost you’ll need to spread it an inch
thick.
Example: 800/12 = 66.67 cubic feet
How to Measure Compost in Cubic Feet
This is where it can get tricky for those of us that are
mathematically challenged. Organic Gardening suggests calculating the
volume of the container holding your finished compost to figure out how much
cubic feet of it you have.
To make things simpler, Organic Gardening has put
together a list of conversions to make calculating the cubic feet of your
compost even easier.
- 1 - 5 Gallon bucket of finished compost = 1 Cubic Foot of Finished Compost
(1 Cubic Foot of finished compost covers 12 Square
Feet with 1 inch of compost)
- 1 - 30 Gallon Garbage Can of finished compost = roughly 4 Cubic Feet of Finished Compost
(4 Cubic Feet of finished compost covers 48 Square
Feet with 1 inch of compost)
- 1 Finished yard of compost = 27 Cubic Feet or 200 Gallons or 1080 lbs. of Finished Compost
(27 Cubic Feet of finished compost covers 324 Square Feet
with 1 inch of compost)
How to Measure Volume & Turn it into Cubic Feet
Here’s the formula to measure the volume of the container
holding your finished compost.
Length x Width x Depth = Volume
Next divide the volume by 27 which tells you how many
cubic yards of finished compost you have.
1 Yard = 27 Square Feet
1 Cubic Yard = 27 Cubic Feet
I know I alluded to my less than savvy math skills above
so I had someone double check the formulas listed above before posting this. The steps above are pretty easy to follow and calculating how much compost you really need gives you a rough idea of how much compost you need to make.
What's your best composting tip?
What's your best composting tip?
Additional Composting Articles
Reference: Organic Gardening (2007). Make Compost in 14 Days. Rodale Inc
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