# Taking Measurements for Driveway Project

I'm a new DIYer and my first project is to cover my sand driveway with bluestone gravel. My question is how do I take measurements of driveway to determine how much gravel to buy? Thank you in advance for your help!

• When you say blue stone is this shale? I have put down a heavy mesh similar to what road crews use for keeping crushed rock /shale from sinking in but the mesh allows drainage. I put 6-8" of rock down and packed it spraying with water while packing, this was over 100' long and there was only 1 area that had problems after 5 years, a heavy rain(storm) filled a low spot on 1 side and washed out some of the sand, I added a drain under that section with more mesh under the pipe and filled the trench with rock until level with the original gravel, this has held up, not sunk , the new owner paved it – Ed Beal Feb 20 '18 at 18:48
• It's not clear what you're asking. What part of the measurement or the math has you stumped? The basic formula for volume is length * width * height. You can then divide into whatever unit you're after (cubic yards, say). – isherwood Feb 20 '18 at 18:51
• @isherwood I think that's what I was looking for! The bags are sold by pound to cover a certain cubic yard measurement. So say for example, the driveway is 9*4*2 (assuming the 'height' would be how deep the sand is?), would that be considered 72 cu yd? – mspatient10 Feb 20 '18 at 19:04
• Your driveway is to be two yards deep? – isherwood Feb 20 '18 at 19:05
• @isherwood no, I think that's how many inches deep the sand is now! :-) I think the answer below might be a good start to what I am looking for. I only want to add about 2 inches of gravel after I compact the sand. I'm totally novice as you can tell but it really doesn't seem that hard. I suck at math/measurements/conversions so I just want to make sure I'm doing that correctly so I get enough gravel the first time around!! – mspatient10 Feb 20 '18 at 19:16

• Triangles: `l * w * .5` – isherwood Feb 20 '18 at 19:07