The formula for estimating how much sand, gravel or greensmix you'll need is:
- Area in square feet x desired depth in feet = Cubic Feet
- Cubic feet divided by 27 = Cubic Yards
- Cubic yards x 1.35 = Tons
- Tons x (100% + percentage needed for waste) = tons required
- An extra 15% of mix is usually added for waste, loss, and error in measuring
