Compound Interest Calculator

Compound interest is interest calculated on the original principal as well as interest accumulated during previous periods.

Because interest can earn additional interest, compound growth can become increasingly significant over longer periods.

Fashnza's Compound Interest Calculator lets you estimate growth using different compounding frequencies and regular contributions.

The standard compound interest formula is:

A = P(1 + r/n)^nt

P is the principal, r is the annual interest rate as a decimal, n is the number of compounding periods per year, and t is the number of years.

The calculator also estimates the effect of regular contributions made according to the selected contribution frequency.

The results are estimates for informational purposes only.

Actual investment returns, savings account rates and financial products may have different rates, fees, taxes, contribution schedules or conditions.

This calculator does not provide financial advice or guarantee future investment performance.

What is compound interest?

Compound interest is interest earned on both the original principal and accumulated interest.

What is the compound interest formula?

The standard formula is A = P(1 + r/n)^nt.

How often can interest compound?

This calculator supports annual, semiannual, quarterly, monthly and daily compounding.

Can I add regular contributions?

Yes. You can enter a regular contribution and choose whether it is made annually, semiannually, quarterly or monthly.

Is the Compound Interest Calculator free?

Yes. Fashnza's Compound Interest Calculator is free to use.

Does Fashnza store my financial information?

No account is required. Calculations are performed directly in your browser.

Are compound interest results guaranteed?

No. The results are mathematical estimates based on the values entered and do not guarantee actual financial returns.