EMI stands for equated monthly installment, which is a fixed payment amount made by a borrower to a lender/bank at a specified date each calendar month.
EMIs(Equated monthly installments) are used to pay off both interest and principal each month.
Please find below on line EMI calculator tool and below the actual formula which will be used to calculate the EMI amount, all banks will use the same formula to calculate the loan EMI amount.
To calculate the EMI amount, please enter your principal amount, rate of interest and the duration in months then click the calculate button.
Note:

Calculator is provided only as general selfhelp Planning Tools.

Calculated EMI Result is indicative only.
P= principal (amount of loan),
R = rate of interest per installment period, i.e., if interest is 12% p.a. R = 1,
n = no. of installments in the tenure,
^ denotes whole to the power.
Example:
Calculate the EMI for the loan amount taken Rs.20,00,000 (20 lakh) at 9% annual interest [9/12 = 0.75 per month] for a period of 15 years (180 months).
Answer:
EMI = P × R × (1 + R)^{n}/((1 + R)^{n}  1)
EMI = 20,00,000 x 0.75/100 x (1+0.75/100)^{12}/ ((1+0.0083)^{12}1)
= Rs 20,285