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jlb
07-29-2006, 10:42 AM
How do I determine how many cubic yards are in 800 square feet.

Unregistered
07-29-2006, 02:06 PM
I think it would be square feet in one cubic yard divided into 800.

27 = square feet in one cubic yard

800/27=29.630

Hope this helped you.

Unregistered
07-29-2006, 02:43 PM
9 square feet to one cubic yard.
800/9 = 88.89

Robert Fogt
07-29-2006, 03:32 PM
It depends on the thickness.

I assume this is something like sand or gravel or soil. Just need to know how thick you plan on spreading it.

Unregistered
09-19-2006, 10:01 AM
Concrete - 3825 sq ft / 4 inches thich

Robert Fogt
09-20-2006, 01:01 PM
3825 square foot * (4 inches / 12) foot = 1275 cubic foot

1275 cubic foot = 47.222 cubic yard

Unregistered
12-18-2007, 11:19 AM
9 square feet to one cubic yard.
800/9 = 88.89

There are 9 square feet to one SQUARE yard, not cubic yard.

Unregistered
02-01-2008, 11:31 AM
There are 81 square feet to a cubic yard, providing the depth is one foot.

The typical formula for conversion is (Length in Feet X Width in Feet X Depth in Feet) / 27 = CY.

Example: 100' (L) X 200' (W) X 6" (D)
= 20000 X .5
= 10000 SF / 27 = 370.37 CY

Unregistered
05-06-2008, 06:58 AM
You need a thickness measurement as well ie square is 2 measurements, cube is 3

since 1 cubic yard = 27 cubic feet ( 3'x3'x3')

Let's say you are using sand 12" thick over 800 square feet,
You'll need a common denominator so 12" = 1 foot thick

1X800 = 800 cubic feet/ 27 cubic feet(feet in a cubic yard)
= 29.62 cubic yards at 1 foot thick

if it's 1" thick.. it's 29.62x1/12 (since 1 " is 1/12th of a foot)
= 2.47 cu yds

if it's 4" thick.. it's29.62 x 4/12 (4/12=.333) so it's 29.62 x .333
= 9.86 cu yds

Now.. if you're using topsoil... for under sod or for a garden factor in compression. add about 15%

Unregistered
06-08-2008, 10:54 AM
It depends on the thickness.

I assume this is something like sand or gravel or soil. Just need to know how thick you plan on spreading it.
I need 6 inches depth over 400 square feet

Sandra
06-08-2008, 03:23 PM
I need 6 inches depth over 400 square feet

if you need to know how many cubic feet you need to cover 400 sq ft just divide the 400 by 2 because 6" goes into a foot twice.

you would need 200 cubic feet to cover that area

or aprox. 7 and a half cubic yards

04-09-2009, 08:52 PM
what difference does it makes sense if it works and thsis does every time I tried it several times, and if you have square feet instead of square yards you just eliminate the step of multiplying by nine, remembering 324 is much easier than remembering a different number for each depth of concrete, I do this about 70 times a month for lettings and this is going to make my life much easier.

I Thank YOU

mtufts55318
04-13-2009, 07:46 PM
Thanks Mr. Fogt for putting this debate into simpler more understandable terms.

I was confused by X 9 = ??? I'm still missing the density factor and that can be gotten by calling or visiting one of the many pits in my area. :confused: :)

Unregistered
05-18-2009, 06:07 AM
In case you are unsure, the previous answer is correct. There are 27 square feet in a cubic yard.

(There are 9 square feet in a SQUARE yard.)

Unregistered
07-16-2009, 07:17 PM
I have a product that spreads over 5000 cu ft. How many square feet is 5000 cu ft?

Unregistered
11-04-2009, 05:51 AM
convert 664 square feet to cubic yards

Unregistered
05-18-2010, 03:04 PM
It depends on the thickness.

I assume this is something like sand or gravel or soil. Just need to know how thick you plan on spreading it.

I am lauing sod

Unregistered
06-08-2010, 12:07 AM
3825 sq ft / 4 inches thich[/QUOTE]

JohnS
06-08-2010, 02:36 AM
3825 sq ft / 4 inches thich[/QUOTE]

1 ft = 12" so

3825 ft² x 4 in x 1ft/12 in = 1275 ft³

Unregistered
07-27-2010, 03:54 PM
How do I determine how many cubic yards are in 800 square feet.

want to convert square feet to cubic yard

Unregistered
07-28-2010, 03:02 AM
i think it would be square feet in one cubic yard divided into 800.

27 = square feet in one cubic yard

800/27=29.630

hope this helped you.

this one is correct and logical

isabel
09-17-2010, 07:58 PM
a ratio of 4 cu. yrds/1000sq. ft. how many cubic yards

JohnS
09-18-2010, 10:53 AM
a ratio of 4 cu. yrds/1000sq. ft. how many cubic yards

You'd have to know the number of (thousands of) square feet to determine the cubic yards

Unregistered
02-13-2011, 06:03 AM
2 inches x12x 12=6 sq ft or 1 cubic ft 3inches x12x12=4sq ft or cubic ft 4inchesx12x12=3sq ft or 1 cubic ft 6inchesx12x12=2 sq ft or 1 cubic ft 1cubic ft x27 =1cubic yard

JohnS
02-13-2011, 07:32 AM
2 inches x12x 12=6 sq ft or 1 cubic ft 3inches x12x12=4sq ft or cubic ft 4inchesx12x12=3sq ft or 1 cubic ft 6inchesx12x12=2 sq ft or 1 cubic ft 1cubic ft x27 =1cubic yard

None of these are true. All of the 12" x 12" examples are 1 sq ft. The volume is that multiplied by the thickness in feet. 2" would be 0.16667 ft³,
3" = 0.25 ft³, 4" = 0.3333 ft³

Unregistered
03-24-2011, 03:25 PM
394 square feet equals how many cubic yards

Unregistered
04-19-2011, 10:44 AM
How do I determine how many cubic years are in 800 square feet? What is the answer.

JohnS
04-19-2011, 10:52 AM
How do I determine how many cubic years are in 800 square feet? What is the answer.

Do you mean cubic yards? There are zero cubic yards in any area unless a thickness is specified.

Convert 800 sq ft to sq yds (88.9 sq yd) and multiply by the thickness in yards.

Unregistered
04-27-2011, 10:43 AM
12' by 200' by 12" deep= how many cubic yards?

JohnS
04-27-2011, 03:54 PM
12' by 200' by 12" deep= how many cubic yards?

12" = 1 ' so that's 2400 ft³
1 yd³ = 27 ft ³, so 89 yd³

There's no allowance for settling as you didn't indicate what material.

Leonardo
11-16-2011, 01:37 PM
need 6" x 400sf = height in square feet x square feet divided by 1 cubic yard

= (.5 X 400)/27

= 7.40741 cubic yards

Unregistered
11-21-2011, 07:11 AM
4.0 cubic feet is how big in square feet?

Unregistered
01-12-2012, 02:29 AM
one square feet t= how much cubic feet

JohnS
01-12-2012, 10:24 AM
one square feet t= how much cubic feet

An area has no volume because it has no thickness, so zero.

An area times a height or thickness is a volume.

Sean
04-07-2012, 06:14 AM
You need a thickness measurement as well ie square is 2 measurements, cube is 3

since 1 cubic yard = 27 cubic feet ( 3'x3'x3')

Let's say you are using sand 12" thick over 800 square feet,
You'll need a common denominator so 12" = 1 foot thick

1X800 = 800 cubic feet/ 27 cubic feet(feet in a cubic yard)
= 29.62 cubic yards at 1 foot thick

if it's 1" thick.. it's 29.62x1/12 (since 1 " is 1/12th of a foot)
= 2.47 cu yds

if it's 4" thick.. it's29.62 x 4/12 (4/12=.333) so it's 29.62 x .333
= 9.86 cu yds

Now.. if you're using topsoil... for under sod or for a garden factor in compression. add about 15%

BillNJ
04-25-2012, 09:12 AM
I have 3,692 square feet to cover with Mulch, about 2 inches thick. Can you tell me how many cubic yards of mulch to purchase?

Robert Fogt
04-25-2012, 02:24 PM
I have 3,692 square feet to cover with Mulch, about 2 inches thick. Can you tell me how many cubic yards of mulch to purchase?

3692 square feet * (2 inches / 12) feet = 615.33 cubic feet

615.33 cubic feet / 27 cubic feet/cubic yard = 22.8 cubic yard

You need about 23 yards of mulch. Order 10%-20% extra if you care that it compacts, probably not since its mulch.

Unregistered
05-13-2012, 08:40 PM
want to convert square feet to cubic yard

5.873 sq ft

tiffinaec
06-03-2012, 04:43 PM
My landscaper has given me an estimate for xeriscaping 3500 SQUARE FEET of my lawn. I'm going for a s,all rock at about one inch covering. The rock quarry (my rock supplier)has given me an estimate in CUBIC YARDS. I know that 3x3x3 is a cubic yard, so do I divide the3500 Sq. feet by 27 cubic yards in order to determine how much rock I will actually need and the cost? The cost is \$27 a cubic yard. Pls. help

JohnS
06-04-2012, 03:50 AM
My landscaper has given me an estimate for xeriscaping 3500 SQUARE FEET of my lawn. I'm going for a s,all rock at about one inch covering. The rock quarry (my rock supplier)has given me an estimate in CUBIC YARDS. I know that 3x3x3 is a cubic yard, so do I divide the3500 Sq. feet by 27 cubic yards in order to determine how much rock I will actually need and the cost? The cost is \$27 a cubic yard. Pls. help

I don't know if 1" thickness is enough, but it is 1/12 ft, so you need 292 ft³.
At 27 ft³/yd³, you need 11 yd³. As the rock is delivered loose, and will compact, I'd add another 15% or so, and suggest 13 yd³.

robert duzant
06-04-2012, 09:00 AM
i have a commercial lot that is 14420 sq. ft. the concrete slab will be 3 1/2 feet thick. i have footings that measure 1 1/2 ft by 1 1/2 feet by 1 feet stretching 778 feet i have 30 piers to concrete at 1 1/4 feet by 1 1/4 feet by 2 feet. how many cubic yards of concrete will i need for the job?

robert duzant
06-04-2012, 09:07 AM
i have a commercial lot that is 14420 sq. ft. the concrete slab will be 3 1/2 feet thick. i have footings that measure 1 1/2 ft by 1 1/2 feet by 1 feet stretching 778 feet i have 30 piers to concrete at 1 1/4 feet by 1 1/4 feet by 2 feet. how many cubic yards of concrete will i need for the job?

JohnS
06-04-2012, 11:27 AM
i have a commercial lot that is 14420 sq. ft. the concrete slab will be 3 1/2 feet thick. i have footings that measure 1 1/2 ft by 1 1/2 feet by 1 feet stretching 778 feet i have 30 piers to concrete at 1 1/4 feet by 1 1/4 feet by 2 feet. how many cubic yards of concrete will i need for the job?

1) Do you mean 3.5 inches, not feet? 3.5 feet seems way too thick and if you needed that thickness, the footings and piers are inadequate.

2) You seem to have four dimensions for the footings, I've assumed 1.5' x 1.5' x 778'

Slab 14420 ft² x 3.5 in x 1 ft/12 in x 1 yd³/27 ft³ = 155.77 yd³
Footings 1.5' x 1.5' x 778' x 1 yd³/27 ft³ = 64.83 yd³
Piers 30 x 1.25' x1.25' x 2' x 1yd³/27 ft³ = 3.47 yd³
Grand total 224.1 yd³

There is no allowance for the concrete displaced by rebar. Actual will be slightly less.

Brandon
06-21-2012, 12:15 PM
400 sq. ft. 6" deep
- 400 sq. ft. @ 1 foot deep is 400 cubic yards ~ (10'x40'X1')
- 6" deep is half of 1' therefore in your case you only have half the cubic feet as 1' deep
~ 10'x40' x '0.5' = 200 cubic feet
- now to convert cubic feet to cubic yards you must first know a few things about a cubic yard. a cubic yard is NOT 3 feet wide by 1 foot deep... instead this would be 3 cubic ft.
- a cubic yard is 3 feet wide by 3 feet deep.. this means there's 3 rows of 3 squares stacked into 3... thus looking like this in a mathematical equation ~ 3x3x3
- the answer is 27 cubic feet. Now we know that 27 cubic feet makes up 1 cubic yard.
- now we know what we need to divide our cubic feet by to get cubic yards
~ 200/27 = 7.407 cubic yards

-- A good rule of thumb i use for concrete is the square footage of the pad divided by 75.
~ this is because at 4" deep 1 cubic yard goes about 80 sq. ft. and 4" deep is what most common flat pours are. allowing for some waste i divide by 75 instead of 80. so in your scenario.. your wanting 6" deep instead of 4" deep. that is ok though, we have enough information to just use a proportion.
first off starting from beginning ~ 400 sq. ft. divided by 75 = 5.333 cubic yards
~ this answer is providing the slab is 4" thick.. you know 2" more (6") is 50% of 4
thus 4 times 1.5 = 6 so you want 5.333 times 1.5 = 8 cubic yards
--you'll notice this answer is a little over a half a yard more than our first calculation. but a half a yard to a yard over is a pretty good waste allowance. if you calculate the first way- the answer is exact so you have to add for waste. using my 75 sq. ft. rule - your waste is allowed for :) happy building and god bless

Unregistered
06-22-2012, 08:32 AM
I need 734 sq,ft.of mulch at a 3 inch depth. How many cubic yards do I need, if I buy it by the cubic yard.
If I buy it by the bag that is 2 cubic ft. how many bags would I need to purchase?

Mrs X
06-22-2012, 12:56 PM
I need 734 sq,ft.of mulch at a 3 inch depth. How many cubic yards do I need, if I buy it by the cubic yard.
If I buy it by the bag that is 2 cubic ft. how many bags would I need to purchase?

Sounds like a home work question. :)

3" is 1/4 of a foot (0.25).

To work out cubic feet, multiply the area in square feet by the thickness in feet. (Then it is easy to work out how many bags you need).

There are 27 cubic feet in cubic yard.

You are welcome to post back here if you would like your answers checked. :)

Unregistered
10-11-2012, 09:45 PM
If I need 40 yards of carpet and the carpet cost .64c a sq ft. How much is the carpet? I know this is simple and i'm just overthinking. lol thank you

JohnS
10-12-2012, 03:59 AM
If I need 40 yards of carpet and the carpet cost .64c a sq ft. How much is the carpet? I know this is simple and i'm just overthinking. lol thank you

1 yd² = 9 ft² so price is \$5.76 yd²

Unregistered
12-03-2012, 07:23 PM
Divide by 98 (to be exact divide by108)

Unregistered
01-17-2013, 11:23 AM
It depends on the thickness.

I assume this is something like sand or gravel or soil. Just need to know how thick you plan on spreading it.

75' x 100' 2' thick

Unregistered
02-08-2013, 02:33 PM
How do I determine how many cubic yards are in 800 square feet. = jwp How many cubic yards are in 978 square feet.

PlmtzUnregistered
02-15-2013, 04:40 PM
How do figure out cubic yards in concrete

Unregistered
03-13-2013, 05:42 PM
How mamy cubit ft in a yard

JohnS
03-14-2013, 03:17 AM
How mamy cubit ft in a yard

3 ft = 1 yd
3³ = 27 ft³ is 1 yd³

Unregistered
03-28-2013, 04:28 PM
I think it would be square feet in one cubic yard divided into 800.

27 = square feet in one cubic yard

800/27=29.630

Hope this helped you.

I don't believe that equation is correct. There is 27 cubic feet in 1 cubic yard. That is different from square feet

Unregistered
09-06-2013, 10:31 AM
concrete - 3825 sq ft / 4 inches thich

want to convert 2700 square feet to cubic yards

Unregistered
09-15-2013, 04:53 PM
132 feet long 9 feet high 6 inch thick, how much cubic yards?

JohnS
09-15-2013, 05:37 PM
132 feet long 9 feet high 6 inch thick, how much cubic yards?

132' x 9' x 0.5' x 1 yd³/27 ft³ = 22 yd³