View Full Version : compost calculation?

beachtownlawnservice

12-15-2011, 02:20 PM

How much compost will i need to cover a 1.5 acres at 1/4 inch?

I called around to a couple of suppliers and they are recommending 100+ yards. Is this right? seems a bit much to me. both places want $31-$35 dollars a yard . but will give me a discount if i buy this much.

Duffster

12-15-2011, 02:25 PM

No offense but can't you do basic math?

beachtownlawnservice

12-15-2011, 02:37 PM

thanks for your 2 cents duffster.

I posted 1/4 inch. but they want 1/2 inch, after i aerate which i read will make a difference in the amount we are to put down. I'm coming in at 101.yards just seems like I'm over calculating something? or missing something? seems like a lot.

Duffster

12-15-2011, 02:41 PM

1.5 acre is a lot.

101 yards is right on the money @ 1/2"

jcr4au

12-15-2011, 06:38 PM

thanks for your 2 cents duffster.

I posted 1/4 inch. but they want 1/2 inch, after i aerate which i read will make a difference in the amount we are to put down. I'm coming in at 101.yards just seems like I'm over calculating something? or missing something? seems like a lot.

For 1/2" take the sq footage and divide by 640. I got 102 yds doing that.

Duffster

12-15-2011, 06:46 PM

For 1/2" take the sq footage and divide by 640. I got 102 yds doing that.

Why 604 and not 648?

NEW CITY LAWN CARE LLC

12-15-2011, 06:52 PM

http://www.pioneersand.com/landscape-material-calculator.htm

80ish Yards at .25" Thick?

Duffster

12-15-2011, 06:56 PM

http://www.pioneersand.com/landscape-material-calculator.htm

80ish Yards at .25" Thick?

Your math sucks.

NEW CITY LAWN CARE LLC

12-15-2011, 07:03 PM

Your math sucks.

Well an acre is 43,560 Sq. Ft. or a Rectangle area of 100 ft. long x 435.6 ft. wide, so if you plug these #'s into any landscape material calculator with his depth at .50" thick it comes out to 67 Yards per Acre, Yeah that last calculator I used had a different #, and was obviously incorrect. So for 1.5 Acres x 67 Cubic Yards/per acre x 1.5=the final answer would be== 100.5 Cubic Yards roughly

Smallaxe

12-15-2011, 09:19 PM

Unless you're on sand I wouldn't bother about 1/2" of compost to begin with, unless you're doing a major overseeding event...

There is a point of "Diminishing returns" with compost as with most other things... It really doesn't take a lot to get your soils going in the right direction and I would speak plainly with the client about that...

Otherwise you're talking about $2000.00 dollars just in materials , correct??

Kelly's Landscaping

12-15-2011, 11:56 PM

I tend to think we are getting way to anal here on the numbers. I take the 1.5 acre number as suggestive at best did you actually measure the lawn was it exactly 65,340 sqft I tend to doubt that. So once you accept that the 1.5 is an estimate and a guess then why does the rest of the math have to be perfect.

ralph02813

12-16-2011, 12:40 AM

Unless you're on sand I wouldn't bother about 1/2" of compost to begin with, unless you're doing a major overseeding event...

There is a point of "Diminishing returns" with compost as with most other things... It really doesn't take a lot to get your soils going in the right direction and I would speak plainly with the client about that...

Otherwise you're talking about $2000.00 dollars just in materials , correct??

Geez, I suck at math, but $31. x 100 is $3,100. lots of money. I agree with smallaxe before you spend their money I am assuming you will charge them somewhere around $4k + labor I would spend a few bucks on lawn chemistry it just might be more productive.

beachtownlawnservice

12-16-2011, 08:40 AM

Yes i have measured the lawn an it is roughly 1.5 acres, give or take,- minus ( flower beds, ditches, driveway) etc.. the math doesn't have to be perfect. I was just running the question by you guys because when i was calculating 100+ yards of compost, and i was blown away. but its right. We are doing a soil sample in February before i start the project. as far as charging for the job I'm still debating what i might do. throwing mulch in a flower bed is one thing but aerating and spreading 100 yards of compost over 1.5 acres and raking it in is a whole different monster. i have a mini skid steer but I'm not sure i want to risk rutting the lawn. i have the manpower but i don't want to break there backs either. the nearest bark yard said they will give me a discount and deliver it for $2540. I told the complex a rough estimate was $7000 to aerate/materials/spread,rake,clean up.. / leaves me $4460 for labor. I have never done a top dressing job before . so i told them 100yrds at $35 a yard was $3500 and $3500 for labor.They seem happy with it , one of the owners watched a documentary on how topdressing is the best thing in the world for your turf and they just want it done.. ( very high end complex/lofts on the water). so i hope i didn't shoot myself in the foot bidding it to low. I will aerate the property by myself the day before, I'm going to have they bark yard drop half on one side of the complex and half on the other. use the skid on the paved surfaces to transport loads to different ares of the complex. 6 guys maybe 2 days?

Landscraper1

12-16-2011, 09:12 AM

Acre = 43,560 sq ft

43,560 x 1.5 = 65,340

65,340 x .5 = 32,670

32,670 / 324 = 100.8 yards of compost

Kiril

12-16-2011, 11:22 AM

How much compost will i need to cover a 1.5 acres at 1/4 inch?

I called around to a couple of suppliers and they are recommending 100+ yards. Is this right? seems a bit much to me. both places want $31-$35 dollars a yard . but will give me a discount if i buy this much.

Figure a yard per 1000 sqft. That allows for 1/4" + some if you don't get it at exactly 1/4", which is likely if you are spreading with a rake.

If you are going to spend the time & money on this, you should also be core aerating & seeding IMO.

AMBoss

04-02-2012, 01:40 PM

The standard calculation for a cubic yard is that it will cover 324 square ft one inch thick! So, measure your area (length x width) and divide by 324 for one inch, 628 for half inch, 1256 for a quarter of inch in depth!

The Grounds Crew

04-02-2012, 02:05 PM

I buy from a local topsoil company called Pacific Topsoil. They have very good customer service and have a calculator on their page that will do the math for you. You just plug in the square feet and the thickness and it will feed out the number of yards of material you need.

Here is the link..... I hope it helps....

http://www.pacifictopsoils.com/topsoil_calculator.htm

I already did it for you if you want it 1/4 inches thick and you get about 50.2 yards.

If you want it 1/2 inches thick you get 100.83.

Just check out the calculator. I am sure it will help you in future bids.

Duffster

04-02-2012, 02:19 PM

I already did it for you if you want it 1/4 inches thick and you get about 50.2 yards.

If you want it 1/2 inches thick you get 100.83

:rolleyes:

AMBoss

04-02-2012, 02:22 PM

There is 46,656 cubic inches in a cubic yard. There are 144 cubic inches in a square foot 1" thick. Therefore, if you divide 46,656 by 144 = 324 which is how many square feet it will cover 1" thick. So, roughly, 100 square feet 3" thick!

AMBoss

04-02-2012, 02:34 PM

:rolleyes:

Sorry Duffster, but your calculations are wrong. A cubic yard covers 324 square feet 1" thick, it would cover twice as many square feet 1/2 thick and 4 times as much 1/4" thick!

Duffster

04-02-2012, 02:39 PM

Sorry Duffster, but your calculations are wrong. A cubic yard covers 324 square feet 1" thick, it would cover twice as many square feet 1/2 thick and 4 times as much 1/4" thick!

Exactly what calculations of mine are wrong? :rolleyes:

Duffster

04-02-2012, 02:48 PM

Exactly what calculations of mine are wrong? :rolleyes:

Well Boss?

AMBoss

04-02-2012, 02:51 PM

My mistake Dufster, that was Landscraper that was wrong. It takes 50.41 cubic yards per acre to cover it 1/4" thick. 1 1/2 acre would take 75.62 cubic yards to cover 1/4" thick!:cool2:

AMBoss

04-02-2012, 02:56 PM

And Landscraper wasn't wrong because he was figuring 1/2" thick!

AMBoss

04-02-2012, 02:59 PM

However, my mistake, Landscaper was wrong because the answer would be 151.25 cubic yards to cover 1 1/2 acres 1/2" thick!

Duffster

04-02-2012, 03:01 PM

My mistake Dufster, that was Landscraper that was wrong. It takes 50.41 cubic yards per acre to cover it 1/4" thick. 1 1/2 acre would take 75.62 cubic yards to cover 1/4" thick!:cool2:

You are truly confused arn't you?

Duffster

04-02-2012, 03:07 PM

However, my mistake, Landscaper was wrong because the answer would be 151.25 cubic yards to cover 1 1/2 acres 1/2" thick!

Your math sucks.:nono: Best stick to something you know. ;)

The Grounds Crew

04-02-2012, 03:44 PM

^ agreed! You are very confused. That's not even right so just stop guessing.

jrs.landscaping

04-02-2012, 06:42 PM

I admid I suck at math. Using an online calculator I came up with 139 yards at .5" depth and 70 at .25" depth. So if that math suck I blame Google. :confused:

Duffster

04-02-2012, 09:23 PM

I admid I suck at math. Using an online calculator I came up with 139 yards at .5" depth and 70 at .25" depth. So if that math suck I blame Google. :confused:

You suck at spelling too. :laugh:

Blame the math on Google. :rolleyes:

Garbage in garbage out.

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