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 |