Calculation EL & Its Eligibility Criteria

Dear All
Please enlighten me the method of
Calculating EL,
Also clarify if the employee join in the mid
Of year then any impact on calculation
Please clarify with example for batter understanding?
Thanks in Advance
Aman

See there are three major acts that identify the concept as an entitlement to leaves that happen due to work done for a certain period of time :-
1) Factories Act - Working Hours and Holidays Under Factories Act 1948 | Indian Labour Laws & Shram Suvidha Simplified
2) Payment of Wages Act
3) Shops and Establishment Act :- https://shopsandestablishmentactsindia.quora.com/
Now as you have not mentioned the nature of business activity it is difficult to elaborate. So just go through the links.