Volume needed based on material

I need an calculator that calculate the amount of gravel needed on a surface in kg (ton) 1000 kg and price

Sort of gravel togheter with price ex. 0-15 mm = 50 kr, 9-15 mm = 55 kr and so on (I must be able to edit this later) where 1 unit equals 1 Ton (1000kg)
Length of surface
Width of surface
Height of surface
Sum: In kg

And it needs to be translatable into Swedish.

This is a request for a calculator left by a user.

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Creative Commons Attribution/Share-Alike License 3.0 (Unported) PLANETCALC, Volume needed based on material