Length of Time in Years. N Number of compounding periods per year. A P 1 rn nt.
A Monthly compound rate P Principal amount R Rate of interest N Time period.
A P 1 rn nt. If the interest is compounded more than once per year such as monthly 12 times per year or quarterly four times per year the formula must be adjusted The formula for compound interest that is compounded multiple times per year is. Compound Interest with Regular Contributions Formula A Future Value of investment P Principle amound invested the original contribution. Even small deposits to a.