# Thread: How to calculate amount of pea gravel/rock needed around pool

1. ## How to calculate amount of pea gravel/rock needed around pool

We are about to enjoy our 2nd summer of our AG pool, last year we had it professionally installed and decided to do the landscaping ourselves, which we never got around to doing last year. i had some ideas but they didn't work out

So... have a couple questions --

1. pea gravel? river rock? or sand?

2. how to calculatte amound needed for around pool, for instance i have a quote of 1 bobcat scoop of pea gravel = 4/5 of a cubic yard, the pool is 24' round

help!

pool - finished r.jpg

2. ## Re: How to calculate amount of pea gravel/rock needed around pool

How wide and how deep will the gravel be?

3. ## Re: How to calculate amount of pea gravel/rock needed around pool

How wide of a circle around the pool to you want the gravel? How thick?

If you want 3' all the way around and 3" thick ... that would be 63.6 cubic feet .. which is 2.36 yards ... about 3 "scoops"

4. ## Re: How to calculate amount of pea gravel/rock needed around pool

http://www.calculatorsoup.com/calcul...calculator.php

figure out the area of your outer circle then subtract the area of your pool from that to get what the border is. Although that link above calculates a circle border for you.

5. ## Re: How to calculate amount of pea gravel/rock needed around pool

good questions lol

I would estimate 2 - 3 feet, as far as dept, I'm not sure, what is normal?

6. ## Re: How to calculate amount of pea gravel/rock needed around pool

You might want some sort of coping at the bottom of the slope, or you are going to be slinging gravel everywhere with the lawn mower....

7. ## Re: How to calculate amount of pea gravel/rock needed around pool

1. River rock. Pea gravel will stick to your feet.

2. v = pi(a^2-b^2)c

where v = volume of rock
pi = 3.14 or so
a = radius to outer edge of rock
b = radius to edge of pool
c = depth of rock

so, for a 24' diameter pool with 2 foot width of rock, 3 inches deep, a = 14', b= 12', c = 1/4'
v = 3.14 x (14^2 - 12^2) x 1/4 = 40.8 cubic feet = 1.51 cubic yards (edited to correct typo)

That's pretty close to two bobcat scoops. Adjust your numbers if you want a wider border or more depth. Use landscape fabric under rock to block weeds.

8. ## Re: How to calculate amount of pea gravel/rock needed around pool

Originally Posted by Taylorbay
good questions lol

I would estimate 2 - 3 feet, as far as dept, I'm not sure, what is normal?
Usually 4"-6"

9. ## Re: How to calculate amount of pea gravel/rock needed around pool

Originally Posted by sargent
1. River rock. Pea gravel will stick to your feet.

2. v = pi(a^2-b^2)c

where v = volume of rock
pi = 3.14 or so
a = radius to outer edge of rock
b = radius to edge of pool
c = depth of rock

so, for a 24' diameter pool with 2 foot width of rock, 3 inches deep, a = 14', b= 12', c = 1/4'
v = 3.14 x (13^2 - 12^2) x 1/4 = 40.8 cubic feet = 1.51 cubic yards

That's pretty close to two bobcat scoops. Adjust your numbers if you want a wider border or more depth. Use landscape fabric under rock to block weeds.
Close, but not quite... typo there. 82.9 cu ft. 3 cubic yards.

10. ## Re: How to calculate amount of pea gravel/rock needed around pool

Originally Posted by Richard320
Close, but not quite... typo there. 82.9 cu ft. 3 cubic yards.
Actually the 13' was the typo but the math was done with 14' ... the 40.8 cubic feet is correct.

- - - Updated - - -

Just use the calculator that pooldv posted and forget about the math that apparently we are all going to mess up

Right!!!

12. ## Re: How to calculate amount of pea gravel/rock needed around pool

thanks everyone! I think now I actually have an idea of how much to get!

13. ## Re: How to calculate amount of pea gravel/rock needed around pool

If I may ask, how much were you quoted for river rock? We need to get some for our landscaping as well but I'm not sure what a good price might be. (Realizing this will vary some by area)

And nice to see a fellow Steelers fan.

14. ## Re: How to calculate amount of pea gravel/rock needed around pool

I vote River Rock over Pea Gravel. River Rock stays where you put it. Pea Gravel wanders around the yard while you are not looking

15. ## Re: How to calculate amount of pea gravel/rock needed around pool

Originally Posted by elwood58
I vote River Rock over Pea Gravel. River Rock stays where you put it. Pea Gravel wanders around the yard while you are not looking
What he said...

16. ## Re: How to calculate amount of pea gravel/rock needed around pool

RIVER ROCK!

Pea Gravel will stick to your feet and the weed eather and lawnmower shoots out them like .22 bullets! They hurt when they hit you. Bad!

17. ## Re: How to calculate amount of pea gravel/rock needed around pool

Originally Posted by Divin Dave
RIVER ROCK!

Pea Gravel will stick to your feet and the weed eather and lawnmower shoots out them like .22 bullets! They hurt when they hit you. Bad!
Yes. Pea gravel = bad. Hurts like crazy on the next step when they stick on your feet. I broke a nice storm door one time with pea gravel with the weed eater just above idle. Glad it was tempered glass. Whatever you get, make sure you do a good border to hold it where it belongs.

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