I. Calculation formula of equal principal and interest:

Calculation principle: from the beginning of monthly contribution, the bank collects the interest of the remaining principal first, and then the principal; The proportion of interest in monthly payment decreases with the decrease of residual principal, and the proportion of principal in monthly payment increases with the increase, but the total monthly payment remains unchanged.

Second, the average capital calculation formula:

Monthly repayment amount = monthly principal+monthly principal and interest

Monthly principal = principal/repayment months

Monthly principal and interest = (principal-total accumulated repayment) x monthly interest rate

Calculation principle: the amount of principal returned every month is always the same, and the interest will decrease with the decrease of the remaining principal.

Three. Description of calculation formula:

According to the above formula

Principal: total loan amount

Number of repayment months: loan term X 12. For example, for a loan of 10 years, the repayment period is 10X 12= 120 months.

Monthly interest rate: monthly interest rate = annual interest rate/12.

Annual interest rate: that is, in the hot topic of mortgage discussion, the figure obtained after the base interest rate is 30% off and 8.5% off.

Cumulative repayment amount: the cumulative repayment amount in the first month of average capital repayment law is 0.