MulchMulch

Calculating for volume for a 3 dimensional object

Area of cone = rsArea of base = r2

SA = rs + r2

V = 1/3 r2 h

S

A = 4r2

V = 4/3 r3

The following formula is used to calculate volume: The following formula is

used to calculate volume:Square L x W x D = cu. (ft, yd, etc)

cuft, cuyd

cuft = 12” x 12” x 12” or ?Cuyd = 3’ x 3’ x 3’ or ?

Circle π x r2 x D = cu. (ft, yd, etc) cuft, cuyd

1728 cuin in a cuft

27 cuft in a cuyd

The following formula is used to calculate cubic

feet:

The following formula is used to calculate cubic

feet: L” x W” x D” = cu. ft. Or L’ x W’ x D’ = cuft 1728

Example: 60’ x 3’ bed w/ 2” layer of mulch

60’ x 3’ x 2” = 12”

180 ftsq x 2”=

12

60’ x 3’ x 2” =

12

360 = 30 cu. ft.

12

The following formula is used to calculate cubic

feet for tree rings:

The following formula is used to calculate cubic

feet for tree rings:V = x r2 x D

Example: 3.14 x 8’2 circle w/ 2” layer of mulch

3.14’ x 64 sqft x 2” =

12”

3.14’ x 64 sq.ft. x 2” = 33.49 cu.ft.

12”or

= 34 cu.ft.

1 wheel barrel = 6 cu.ft.

How many wheel barrel loads?

5.7 loads

Calculating the Amount of Mulch You Need

Calculating the Amount of Mulch You Need

Although lawns and garden beds are measured in feet, mulch is purchased in

"yards"

A "yard" of mulch is actually a cubic yard - one yard wide by one yard high

by one yard deep

The following formula converts feet to cubic

yard:

The following formula converts feet to cubic

yard: L x W x D = cu. Yds

27

Example: 60’ x 3’ bed w/ 2” layer of mulch

60 x 3 x 2/12 =

27

180 x 1/6 =

27

60 x 3 x 2/12 =

27

30 = 1.1 cu. yds

27

Importance of MulchesImportance of Mulches

Types of Mulches