Depends on the commodity. 300 cubic inches of mulch and 300 cubic inches of cement will not weigh the same.
22.2 cubic yards.
To cover 300 square feet 4 inches thick, you would need approximately 3 cubic yards of gravel.
300^3 feet = 3600^3 inches. Dimensional weight in the USA is cubic inches/194, thus 18.5lb Internationally it is cubic inches/166, thus 21.6lb http://en.wikipedia.org/wiki/Dimensional_weight
Oh, dude, 300 cubic inches is like the volume of a box that's 5 inches long, 5 inches wide, and 12 inches tall. So, you know, it's not huge, but it's not tiny either. Just enough space to hold a bunch of random stuff you probably don't need.
300 pounds is a fraction of a ton. 300/2000 tons reduced will be 3/20 of a ton or in a decimal 0.15 tons.
0.15 US tons.
300 x 2/12 = 50 cubic feet 27 cu ft = 1 yard 50 cu ft = 1.85 yards. That is about 2.4 tons
This question cannot be answered because there are no units given for 300 cubic.
I think you mean 3000? and it depends on the volume (size) which is measured in Cubic Inches.
To answer you need to know: 1ml = 1cc, 16.387064cc = 1 cubic inch, 1 gallon = 231 cubic inches, 128 ounces = 1 gallon, Your answer is: 300 ml = (300 / 16.387064)*(128/231) = 10.1442 ounces
1 cubic metre = 1000 Litres so 300 cubic metres = 300 000 Litres.
About 2 tons of feathers or 300 tons of heavy metal.