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order to transfer a known amount kg per cubic meter, find the density of a substance for which the transfer is made.To do this, find the corresponding table-density substances.For convenience the density of matter in such a table should be indicated in kilograms per cubic meter (kg / m³).This is a standard unit of measure density in the SI (International System).
defining the table density of the substance, use the following formula:
KMC = CGC / P,

where: CMC - the number of cubic meters,

CGC - the number of kilograms (kg),

P -the density of matter, expressed in kg / m³.
For example, suppose you want to calculate how much (how many cubic meters) will take 10 tons (10,000 kg) decking.
located (on the Internet) the density of the decking.It is 800 kg / m³.Using the above formula, we can calculate that the number of cubic meters will be:

10000/800 = 12,5
often happens that determine the density of matter in the tables is difficult.For example, the right of the table may not be at hand, or do not know the name of the substance.Sometimes things can be composed from several materials, combined in an unknown proportion.Moreover, even the density of a known substance (material) may vary within wide limits (e.g., wood density depends on the humidity).
If we define the density of matter in the table failed, then measure it yourself.To do this (possible) separate piece of material, it is desirable to correct form and calculate its volume in cubic meters.For example, if the board is then cut off a segment exactly approximately half a meter board.Then measure (in meters) length, width and thickness of the sample.Multiply these numbers - the resulting product will be in volume.Now weigh the scrap board and divide it by weight (in kg) to the previously calculated volume (in cubic meters).The resulting number will be equal to the density of the board in kg / m³.
If cubic meters need to transfer a known amount of a kilogram of water or weak solutions of other substances, the density of the liquid can be taken as 1,000 kg / m³.It's density can be used in the rough (estimates) calculations of the amount of other liquids.
To get the exact value of the density of the liquid, pour off the liquid into a measuring cylinder and fill her container with a known volume.Then, weigh the container with the liquid and divide her weight (excluding the weight of the container) on the volume.Similar manipulations proceed to get the bulk density of the substance.