Formulas - Coverages and Quantities

General Formulas

  • There are 2000 pounds in a ton
  • For most bulk materials, number of yards x 1.5 = number of tons
  • Area of a square or rectangle = width x length
  • Area of a circle = 3.14 x radius squared
  • Circumference of a circle = 3.14 x diameter
  • Volume of a cube = width x length x height
  • Volume of a tube = 3.14 x radius squared x height
  • There are 27 cubic feet in a cubic yard
  • Most boulders weigh about 170 lbs per cubic foot

Coverage

  • 1 Gallon of Plasterweld or Weldcrete Will Cover
    Approx. 200 SQ FT
  • 1 Yard of Most Bulk Materials Will Cover
  • 320 SQ FT @ 1 inch thick
    160 SQ FT @ 2 inch thick
    120 SQ FT @ 3 inch thick
    80 SQ FT @ 4 inch thick
  • 1 Ton of Flagstone Will Cover
    Approx. 120 SQ FT @ 1 ¼ inch thick
    Approx. 100 SQ FT @ 1 ½ inch thick
    Approx 75 SQ FT @ 2 inch thick
  • 1 Ton Of Most Wallrock Will Cover Approx. 35 SQ FT
  • Square Foot per Piece of Cut Stone
    Length x Width (in inches) divided by 144 = SQ FT per piece

Formula for Mortar

  • 3 Parts Sand
  • 1 Part Common Cement
  • ½ Part Lime

Stucco Coverage Formula

  • Square footage divided by 9 = square yards
  • Square yards divided by 6 = # of sacks needed
  • # Of sacks needed x 400 = lbs of sand needed

1000 Brick or 500 8x8x16 Block

  • 1 Ton Sand
  • 6 Sacks Common Cement
  • 3 Sacks Lime

Approx Coverage For Natural Stone

Thickness in Inches Pounds per SF Approx. Coverage per Ton
1/2 6.75 300
3/4 10.12 200
1 13.5 150
1 1/4 16.87 120
1 1/2 20.25 100
1 3/4 23.62 85
2 27 75
2 1/2 33.75 60
3 40.5 50
4 55 36
5 67.5 30
6 81 25
7 94.5 21
8 108 18

Sonotube Concrete Requirements

Column Diameter (Inches) Cubic Yard Concrete Per Foot of Height
6 .0073
8 .0129
10 .0202
12 .0291
14 .0396
16 .0617
18 .0654
20 .0808
22 .0978
24 .1164
26 .1386
28 .1584
30 .1818
32 .2069
34 .2335
36 .2618