ln = natural logarithm, used in formulas belowĬompound Interest Formulas Used in This Calculator.

Divide your partial year number of months by 12 to get the decimal years.

t = time in decimal years e.g., 6 months is calculated as 0.5 years.

n = number of compounding periods per unit of time.

R = Annual nominal interest rate as a percent.r = Annual nominal interest rate as a decimal.A = Accrued amount (principal + interest).You can also use this formula to set up a compound interest calculator in Excel ®1. It uses this same formula to solve for principal, rate or time given the other known values. This calculator uses the compound interest formula to find principal plus interest. We also show you how to calculate continuous compounding with the formula A = Pe^rt. Read further below for additional compound interest formulas to find principal, interest rates or final investment value. You can also experiment with the calculator to see how different interest rates or loan lengths can affect how much you'll pay in compounded interest on a loan. We provide answers to your compound interest calculations and show you the steps to find the answer.

The compound interest calculator lets you see how your money can grow using interest compounding.Ĭalculate compound interest on an investment, 401K or savings account with annual, quarterly, daily or continuous compounding.

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