Conclusion: The simple formula for converting the annual interest rate into monthly interest rate or daily interest rate is that the monthly interest rate is equal to the annual interest rate divided by 12, and the daily interest rate is the annual interest rate divided by 360. When calculating the interest on RMB deposits, banks in China usually use 360 days as the base instead of 365 days. The annual interest rate data is usually published in multiples of 9, so that it can be divided by all after conversion. Knowing this foundation, we can convert it through the following steps: 1. If your annual interest rate is 6. 15%, to convert it into monthly interest rate, just divide 6. 15% by 12, that is, 5. 125% (expressed as 5.65438+ per thousand).

2. Take the loan with regular interest as an example, the interest will be settled on the 20th of the last month of each quarter, and the calculation formula is: interest accumulation (loan days) × (loan annual interest rate ÷360). If you know the amount, days and annual interest rate of the loan, you can use this formula to calculate the interest of each period.

3. If the interest is settled one by one, that is, the interest is paid with the principal, the loan interest is: loan amount × loan days × (loan annual interest rate ÷360). In this case, you need specific values of loan amount and loan days.

There are many online calculators on the market now, which can directly input the loan terms and quickly calculate the monthly repayment amount. As long as the loan details are confirmed to the real estate company, it can be easily calculated.