# Help with rock calculation please.

Discussion in 'Landscape Architecture and Design' started by Steve, Feb 11, 2020.

1. ### SteveLawnSite Bronze MemberMale, from NE FLMessages: 1,698

I'm doing my first rock bed and when I went to the store to get info on how much I need I was told I would need 2 yards for 300 square feet, I think he told me 2-2.5" deep for Colorado River Jack 1"-2" just to get me a ball park figure of what it will cost.

Now that my measurements are complete I need to cover a total of 563 sq ft. I called the same business but a different location and I was told I need 4.5 yards, I then called the location I visited the other day and I'm told I need 6 yards. I then searched a site and filled in the measurement for stone 1"-3" said I need 4.6 tons. Does a ton equal a yard? I also did the W x L x 1.67 and got 3.47 yards

So my questions are if I calculate for 2" deep will that be enough? if I had 4.5 yards dropped right next to where its going, how long would it take to disperse it with shovel and wheel barrel?

2. ### Matthews Lawn CareLawnSite Gold Memberfrom Neosho, MOMessages: 3,139

1yd = 1 ton is pretty close. I always add a little extra to your calculation.

I couldn’t tell you how long it takes with a shovel but I can tell you I did 7 yds in about 4 hours using my tractor to move the rock and hand raking it.

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3. ### BlockHead23LawnSite Memberfrom Belleville, ILMessages: 53

We use these guidelines and it seems to be fairly accurate

1"-2" River Rock = 80 square foot per ton at 2 inches deep

2-4" River rock = 70 square foot per ton at 2" deep

4. ### Mac-s Lawn & SnowLawnSite Senior Memberfrom Grand Rapids MinnesotaMessages: 451

Here are the calculations I use for rock:
1 yard of rock covers around 100 sq ft at 2.5 inches deep
1 yard of rock weighs around 1.33 tons
1.5 inch rock should be installed around 2.5 inches deep
the larger the rock, the thicker it needs to be installed
1 yard of rock is equal to 7 or 8 wheelbarrows(jackson)
If you can install a yard of rock in a hour with just a shovel and wheelbarrow your doing pretty good.

Steve likes this.
5. ### MowDaddyLawnSite Fanaticfrom Grand Rapids, MNMessages: 6,596

My rule is.
If they want rock, call Mac's.

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6. ### rclawnLawnSite Bronze Memberfrom Kansas CityMessages: 1,414

This is hands down the best shovel for scooping rock if you are doing by hand. Very durable unless you run over the handle, which I have twice, but cheap to replace!

7. ### BigJlittleCLawnSite Fanaticfrom ChicagoMessages: 7,626

Mac needs a 2nd location in the windy city.

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