You will need
  • calculator,
  • - Libra,
  • - barometer,
  • thermometer,
  • - Handbook of physics.
Determine the weight of the substance in grams. To do this, use weights.

Many foods are sold pre-packaged. In this case, the question of the weight disappears by itself. For example, in a standard pack of sugar, this food product is one kilo exactly.
Find it in the Handbook of physics the density of the desired substance.

For more accurate result of subsequent calculations, use an existing reference corrections for pressure, humidity and temperature of the air.
The value of the density of the material in the Handbook may be given in different units. If the density is specified in kg/cubic m - set the value of the density in g/CC and ml To do this, move the kilograms to gramsand cubic meter - milliliters. Then substitute in the numerator and denominator of the respective units, and they multiply the table value density: the density (from table) * 1000 g/1 000 000 ml.
Use the calculator to calculate the amount of material: divide the mass by the density.

Don't forget about the units!
The resulting value will determine the ratio of the mass of a substance in grams by its volume in milliliters.