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what is the formula for compound interest rate. P the principal investment amount. It is the result of reinvesting interest rather than paying it out so that interest in the next period is then earned on the principal sum plus previously accumulated interest.
And interest rate applied for one year is the annual interest. Heres the compound interest formula. P principal amount the initial amount you borrow or deposit r annual rate of interest as a decimal t number of years the amount is deposited or borrowed for.
Compound interest includes the interest generated on the principal and the accumulated interest from any previous period.
Using the same information above enter Principal. A Monthly compound rate. Using the same information above enter Principal. The formula used in the compound interest calculator is A P1rn nt A the future value of the investment.