How many kilograms in a cubic feet or cubic meter of 10mm?

Answer 1

It depends on 10mm what, and the density (or specific gravity) of whatever that substance is.

Answer 2

To convert 10mm to kilograms in a cubic foot or cubic meter, you need the density of the material in question. Without knowing the material's density, a direct conversion is not possible. The density of the material will determine the amount of kilograms in a given volume.