Calculator for Option Settlement margin

Zerodha has a calculator to identify margin requirement for Short options , but no calculator is available to display the same for LOng options.
How can i find out the margin requirement for E-4, E-3,E-2-E-1 days. The generic statement of 10%Var +ELM +Adhoc doesnt help much.
I have a lot of IDFCFIRST bank for 57 strike price. The actual contract value if it needs to be exercised comes out to be 5.5 lakhs . I need to know how much margin i need to maintain on E-4 days onwards