VOLUME  FORMULAS

Cone:
(dirt stockpiles)

Volume = (pi x r² x 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 r²
  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 x r² x 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