It depends on the density of the substance
Around one hundred pounds.
Roughly about 30 pounds per cubic foot, so 2 cu ft is about 60 pounds
Bark mulch weighs between 400 to 800 pounds for one cubic yard. The actual weight depends on how much moisture is in the mulch.
You want to order your mulch in cubic feet, so multiply length x width x depth and that's the answer. (Make sure ALL the measurements are in feet.)125 x 60 x .5 = 3750 cubic feet
2.5 cubic feet of water weighs about: 156 pounds.
10pounds
25 cubic feet or about 1 cubic yard.
3.1 cubic yards for every 2 inches deep you want it to be.
On average, 8 cubic feet of concrete can weigh around 4,000-4,500 pounds, depending on the density of the concrete mix.
The weight of 0.4 cubic feet depends on the density of the material. To convert volume to weight, you need to know the specific density. If we assume an average material density of 100 lbs/cubic foot, then 0.4 cubic feet would weigh 40 lbs.
When you say a yard, you are actually saying a cubic yard. If you were to place the much in a 3 foot high by 3 foot wide by 3 foot tall cube, it would exactly fill the cube. How much it covers depends on how deeply you spread it. Since you should spread it at a dept of no less than 4 inches, it should cover about 20 square feet. If you spread it deeper than that, it will of course, cover less area.The 'square feet' of area that it covers is 324/(depth of the mulch, in inches)