substrate amount?

[THEADEMARCO]

How many litres of substrate (using orchid bark if it matters) would I need to fill up a 100cm x 200cm tortoise table? The depth is 30cm, and I'm looking to fill it up to around 15cm high.

 

[Tom]

How many litres of substrate (using orchid bark if it matters) would I need to fill up a 100cm x 200cm tortoise table? The depth is 30cm, and I'm looking to fill it up to around 15cm high.

Too much math for me. I just keep adding some until it gets to 3 or 4 inches thick.