The basic definition of interest period is the loan term, which can also be said to be the number of months of the loan.

The calculation formula of average capital is as follows:

a 1=(F÷n)+F*i

a2=(F÷n)+(F-F÷n)*i

a3=(F÷n)+[F-2F÷n)]*i

.....

an =(F \n)+[F-(n- 1)F \n)]* I

A 1, A2 ... monthly payment.

F total loans

Repayment month

My monthly loan interest rate.

Where n is the number of repayment months, also known as the interest period.