If you are going to buy river stone/pebles/rock from supplier they use the "formula"
Cubic Yards x 1.25 = Weight in tons.
They then sell it by the ton. (say $300 per ton)
But this is an approximation. If it is one very big river rock it would be a good approximation, but even then it would depend upon the density of the rock eg granite would require a bigger constant (the 1.25) than a Sandstone boulder.
that depends on th type of sand
You need to know the density of the aggregate. Typically that will be in Imperial system (pounds per cubic feet) or in SI system (kilograms per cubic metre). Use Volume = Mass/Density to convert to volume in the same system. Then convert from SI to Imperial (or reverse) using 1 cubic metre = 35.315 cu ft or 1 cu ft = 0.02832 cubic metre.
Roughly about 30 pounds per cubic foot, so 2 cu ft is about 60 pounds
AnswerOne cubic feet = 40 Kilogram that is One cubic meter = 1411.50 Kg
5280 ft x 5280 ft x 5280 ft x 62.4 lbs per square ft = 9,185,152,204,800 lbs
Approx. 62.42lbs and it all depends on the temperature, the salinity, at what depth and thus the pressure
8 inches = 2/3 ft 1 cubic yard = 27 cubic ft Volume = (32 x 2/3) cubic ft = 211/3 cubic ft = 0.79 cubic yard
At 62 degrees F (16.7 C,) 1 cu ft of water weighs 62.3 Lb
12 ft * 10 ft * 10/12 ft = 10 cubic feet.12 ft * 10 ft * 10/12 ft = 10 cubic feet.12 ft * 10 ft * 10/12 ft = 10 cubic feet.12 ft * 10 ft * 10/12 ft = 10 cubic feet.
1,950 cubic feet equals 55.22 cubic meters.
Pu ≈ 19.816 g/cm³ so 1 ft³ · 19.816 g/cm³ · (12 in/ft)³ · 2.54 (cm/in)³ ≈ 561,127 gms or about 1,237 lbs
3.5 cubic feet is 6,048 cubic inches.