# Rock Calculations

Discussion in 'Landscape Architecture and Design' started by drsogr, Oct 10, 2005.

1. ### drsogrLawnSite Bronze Memberfrom Wichita, KSMessages: 1,275

I am trying to find out how much rock I will need for 792 Sq. Ft @ 4" deep for 2" - 3" egg rock. If any one can help that would be great, because the rock people were just guessing out of their arse. I am guessing 5 tons...but really have no clue.

2. ### DBLLawnSite Silver Memberfrom Chester County, PaMessages: 2,219

go to google and type in rock calculators and then there will be sites where you can put in all your dimensions to find out how much you need

4. ### joe2106LawnSite Memberfrom BEATRICE, NEMessages: 214

This is how I figure it.

792 x .33 (4 inches)=261.36/27=9.68 cubic yards. To convert 2-3" rock from yards to tons: 9.68 x 1.19=11.51 tons

I work for a concrete co. and do rock/ concrete calcs daily, so I hope I am in the ball park. With rock you may be able to stretch it a little further than concrete. I would get 10-11 tons and that should make it.