favorite online calculators?

[Wolfgang Schechinger]

My favourites:

DNA/RNA calculator (OD -> mg/ml, mM)
Chem Formula -> molecular weight (g/mol)
Buffers (desired pH and ion strength with common and not so common buffer 
chemicals)

Regards, 

Wo
> Hi everyone,
> 
> I would really appreciate your opinion.  If you were to pick 3 online
> applications/functions, that is the online calculators for example a celcius to
> farh. converter etc... what would it be that you would like to see on a
> website?
> 
> Cheers,
> 
> 
> 


---