We’re often asked to help calculate how much sand, topsoil, or stone will be needed for a particular job. Here are some common calculations and conversion factors to use when filling a hole or topdressing.

FILLING A HOLE

To determine how much sand, topsoil or stone you need to fill an area:

  • Measure number of square feet in the area
  • # of square feet x depth in feet = # of cubic feet
  • # of cubic feet /divided by 27 = # of cubic yards
  • # of cubic yards x (unit weight in pounds / 2000) = # of tons needed

(See chart below for unit weight conversion factors)

Remember to add 10-20% to the total for compaction and waste

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MATERIAL WEIGHTS PER CUBIC YARD

  • Sand: 2,700 lbs (cubic yards needed x 1.35 = tons needed)
  • Topsoil: 2,200 lbs (cubic yards needed x 1.1 = tons needed)
  • Clay: 3,000 lbs (cubic yards needed x 1.5 = tons needed)
  • Compost: 1,200 lbs (cubic yards needed x 0.6 = tons needed)
  • Crushed Gravel: 2,700 – 3,000 lbs depending on stone sizing
  • Decorative Stone: 2,700 – 3,000 lbs depending on stone sizing

TOPDRESSING

To determine how much sand topdressing you need to cover an area:

  • Measure number of square feet in the area
  • # of square feet x depth of application in inches x 0.0031 = cubic yards of topdressing needed for surface coverage
  • # of cubic yards x 1.35 = # of tons of sand needed

(See chart above for unit weight conversion factors for topdressing with materials other than sand)

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