Hi, in following circuit how do i calculate value of inductors L1, L2, L3, L4. (Design equations for inductors)
BLM likely refers to Murata BLM series of chip ferrites.  See www.murata.com .  You might just select the ferrite part to reduce noise at the frequency that you believe would disrupt your circuit.  Just be sure that the DC resistance is not so high that it could give a significant voltage drop.   

The Murata spec sheet should list these parts by recommended current, so if you know the current draw on the pins this will help with selection.