F=P*( 1+i)^n
F=A(( 1+i)^n- 1)/i
P=F/( 1+i)^n
p=a(( 1+i)^n- 1)/(i( 1+i)^n)
A=Fi/(( 1+i)^n- 1)
a=p(i( 1+i)^n)/(( 1+i)^n- 1)
F: future value, or future value, that is, the sum of principal and interest at the end of the period.
P: present value, or beginning amount.
A: Annuity, or equivalent.
I: interest rate or discount rate
N: Number of interest-bearing periods
The characteristic of compound interest calculation is that the sum of the principal and interest at the end of the previous period is taken as the principal of the next period, and the principal amount of each period is different when calculating. The formula for calculating the principal and interest of compound interest is f = p (1+I) n.
The calculation of compound interest can be divided into intermittent compound interest and continuous compound interest The method of calculating compound interest on schedule (such as year, half year, quarter, month or day) is intermittent compound interest; The calculation method of instant compound interest is continuous compound interest. In practical application, the calculation method of discontinuous compound interest is generally adopted.
2. The calculation of compound interest is to consider the interest in the previous period, and it should be included in the repeated interest calculation of the principal, that is, "interest generated from interest" and "interest accumulated".