VOLUME  FORMULAS

Cone:
(dirt stockpiles)

Volume = (pi xx h)/3
pi = 3.1415
r = radius
h = height

Sphere:

Volume = (4 x pi x r³)/3
pi = 3.1415
r = radius

Call me today  678-878-0641  or email me
DirtEstimator@div2est.com

AREA  FORMULAS

Circle:

Area  = pi x
pi = 3.1415
h is the height
r is the radius

Triangle:

Area  = b x h x 1/2
b = base
h = height

Ellipse:

Area  = pi x r  x r
pi = 3.1415
r1 = radius of the long axis
r2 = radius of the short axis
There are certain formulas anyone who works in grading / excavating / pipe laying will need to know.  Some will be used everyday, others not so often.  All should be committed to memory.  If that is not possible, they should be kept in a handy place.
More Formulas & conversions to come.  I am building this page.
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VOLUME  FORMULAS

Cube:

Volume = a³ = a x a x a

Cylinder:
(manholes & pipe)

Volume = pi xx h
pi = 3.1415
h = height
r = radius

Rectangle:
(Box Culverts,
Trenches, Slabs)
Volume = l x w x h
l = the length
w = width
h = height

Call me today  678-878-0641  or email me
DirtEstimator@div2est.com

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CONVERSIONS

1 Acre = 43,560 sf
1 CY = 27 CF
1 Acre x 6" = 807 CY
1 CF = 7.48 US Gallons
1 SY inch Asphalt = 110 lbs