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Interest Rate Calculator

Our online tools will provide quick answers to your calculation and conversion needs. On this page, you can calculate rate of interest (absolute and annualized) given the initial and final amounts, with or without compounding. This is also useful for figuring the rate of return of your investments.

Final Value:

Initial Value:

Time Period (Optional):

with compounding without compounding

Android: Use this interest calculator offline with our all-in-one calculator app.


Interest rate calculation

Use this calculator to solve for variable r (interest rate) in both simple and compound interest calculations.


The rate of return (interest rate) over a single period is:
r (%) = (Vf - Vi) / Vi * 100
Vf = final value, including dividends and interest
Vi = initial value

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