Compound Interest Calculator

This calculator will calculate values for compound interest.

Calculator:

Enter a value in any three of the following fields and press the "calculate" button. The missing value, or the field with value of 0, will be calculated.

Interest must be entered as a decimal value (e.g. 5% = .05). Note that if you fill in all four fields, the future value will be updated with the correct value.

Present Value: Interest Rate: Number of Periods:
Future Value:
Enter any three and press ->

Equations:

FV = PV*(1 + r)n
PV=FV/(1+r)n
n = log(FV / PV) / log(1+r)
r = (FV/PV)1/n - 1

Variables:

PV = Present Value
FV = Future Value
r = interest rate (e.g. 5% = .05)
n = number of years

Return to Kerry's home page