Formula to calculate the results for reverse mortgage calculator is as given below:

Installment Amount = (PV*LTVR*I)/((1+I)ⁿ-1)

Where, PV=Property Value; LTVR=LTV Ratio; n=No. Of Installment Payments; I=The value of 'I' will depend on Disbursement Frequency selected. For Example,
Property Value(PV) = 10,00,000
LTV Ratio(LTVR)=80%
Loan Disbursement Period=15 Years
Disbursement Frequency=Monthly
Interest Rate(IR) = 10.5 %

Calculations: On the basis of the inputs:
The disbursement frequency selected is Monthly so 'I' will be IR/12(i.e 10.5%/12)
No. of installment payments(n) will be calculated monthly e.g if 15 is selected then the n=15*12=180
Putting the values in the formula:
Installment Amount=Rs.1850;

Note: 'Click here to Round off to the multiple of Rs. 10' round off the calculated result to next multiple of rupees ten.