It is impossible to convert cubic area (volume) into mass without any further information but if you have the mass and the cubic area (volume) you can multiply them by each other
http://wiki.answers.com/Q/How_converting_cubic_met...

1. Multiply the density in kilograms per cubic meter by 0.0624279620336 to convert to pounds per cubic foot. For example, if you have a density of 50 kg/m^3, multiply 50 by 0.0624279620336
http://www.ehow.com/how_8782973_convertpoundsper...

You don't. One is a measure of weight, the other of volume. How do you convert pounds into cubic feet?
http://answers.yahoo.com/question/index?qid=200810...

There is one kilogram in a cubic meter. Thanks for asking ChaCha!
http://www.chacha.com/question/howmanykilograms...
