I have found these application rates quite helpful in the past when ordering bulk materials like top soil or compost as well as bagged amendments. If you will look closely when you purchase bags of cotton bur compost, humate, composted manures, or organic fertilizers like Sustane you will find printed on the bag how many cubic feet or yards the entire bag will cover.
Red Dirt Gardening Application rates:
1 cubic yard
Covers 1296 square feet 1/4 ” deep
Covers 648 square feet 1/2 ” deep
Covers 324 square feet 1” deep
Covers 162 square feet 2” deep
Covers 108 square feet 3” deep
3 cubic foot bag
Covers 72 square feet 1/2 ”deep
Covers 36 square feet 1” deep
Covers 18 square feet 2” deep
Covers 12 square feet 3” deep
2 cubic foot bag
Covers 48 square feet 1/2 ” deep
Covers 24 square feet 1” deep
Covers 12 square feet 2” deep
Covers 8 square feet 3” deep
1 cubic foot bag
Covers 24 square feet 1/2 ” deep
Covers 12 square feet 1” deep
Covers 6 square feet 2” deep
Covers 4 square feet 3” deep
“The Original” Red Dirt Gardener