I have some money saved up and i was wondering on how much of it should i give to Zakat ul maal. Could you please advice me on this? Thanks,

Alhamdu Lillah

If the savings you have worth the value of 85 grams of gold or more, then it is subject to Zakah based on 2.5% Zakah rate, and on an annual basis.

And if you have money other than that from different resources, then they have to be pooled together, and Zakah should be paid on the total.