Compound Interest Definition Math
This addition of interest to the principal is called compounding.
Compound interest definition math. Finds the future value where. A p 1 r k kt a p 1 r k k t. Usually calculated one or more times per year. Interest accrued in prior periods is added to the principal and then interest in the current period is calculated on the total.
The process of charging or earning interest on interest. The basic formula is this. Pv fv 1 r n. When the interest is compounded once a year.
Fv pv 1 r n. The compound interest can be found with the formula. The basic formula for compound interest is. The interest to be added interest rate for one period balance at the beginning of the period.
Fv future value pv present value r interest rate as a decimal value and. The interest rate together with the compounding period and the balance in the account determines how much interest is added in each compounding period. However if you borrow for 5 years the formula will look like. And by rearranging that formula see compound interest formula derivation we can find any value when we know the other three.
Where interest is calculated on both the amount borrowed plus previous interest. P 1 i n 1 where p. Compound interest arises when interest is added to the principal so that from that moment on the interest that has been added also itself earns interest. Compound interest total amount of principal and interest in future or future value less principal amount at present or present value p 1 i n p.
Work out the interest for the first period add it to the total and then calculate the interest for the next period and so on like this. N is the number of years the amount is deposited or borrowed for. A is the amount of money accumulated after n years including interest. Calculating interest on both the amount borrowed plus previous interest.
N number of periods.