Unit conversion

[bprku]

Can anyone help me by converting daphnia/L into Daphnia/square meter.
for example If I have 20 Daphnua/L, then how may it will be in square meter:

20 Daphnia/L = ?? daphnia/m2.

[alextemplet]

A liter is 1/100th of a square meter.

[bprku]

thanks alot

[canalon]

A litre is a volume. A square metre is a surface.
There are 1000 Litres in a cubic meter.
If you want to know how many daphnia there are below 1 square meter of surface of sea/fish bowl/lake water you first have to calculate the volume under that surface by multiplying it by the depth of the water.

[alextemplet]

Oh goodness, I just realized I converted to square meters and not cubic meters! Goodness, I'm going to chalk that up to a finals-induced brain fart. Hopefully I won't do something that silly on a test! :p