Compound Interest Calculator

Project growth with regular contributions and any compounding.

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About the Compound Interest Calculator

See how an investment grows over time with compound interest. The Toolcenter Compound Interest Calculator takes an initial amount, an annual rate, a term, a monthly contribution and a compounding frequency (daily to yearly), then shows the future value, total contributed, interest earned and a year-by-year growth chart.

How to use it

1Enter your initial amount and annual rate.
2Set the number of years and monthly contribution.
3Choose the compounding frequency.
4Read the future value and study the growth chart.

Key features

Regular monthly contributions
Daily, monthly, quarterly, semi-annual and annual compounding
Future value, contributions and interest split
Year-by-year stacked growth chart
Multiple currencies

Frequently asked questions

What does compounding frequency change?+

More frequent compounding earns interest on interest sooner, so daily compounding yields slightly more than annual at the same rate.

Are contributions added before or after interest?+

Each period the balance grows by the periodic rate, then the contribution for that period is added.

Does it account for tax or inflation?+

No. It shows nominal growth. Subtract your expected tax and inflation separately for a real-terms view.

Is my data saved?+

Only in your browser to remember the form. Nothing is transmitted.

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