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Compound Interest Calculator
Simulate the growth of your savings or investment.
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⚠️ Reference rates: results are estimates. Consult a financial advisor for important decisions.
The compound interest calculator simulates how much your money grows by reinvesting the interest, month by month: it starts from an initial capital, adds the periodic contributions you want and projects the final result with monthly compounding. You will see the final amount, how much you contributed from your own pocket and how much of that balance is interest. Great for savings, deposits and long-term investments. It is an indicative projection: it does not consider taxes or fees. Use it as many times as you need: it is completely free, requires no sign-up and works directly in your browser.
Frequently asked questions
¿Qué es el interés compuesto?
Es el interés sobre el interés: los rendimientos se reinvierten y pasan a formar parte del capital, acelerando el crecimiento. Einstein lo llamó 'la octava maravilla del mundo'.
¿Cuánto aporto habitualmente?
El resultado depende de tu situación. La clave del interés compuesto es el tiempo: incluso aportaciones pequeñas y constantes crecen mucho a largo plazo.
¿La estimación incluye impuestos y comisiones?
No. Es una proyección del rendimiento bruto. Impuestos, inflación y comisiones del producto reducirían la cifra final.
What is compound interest?
It is interest on interest: returns are reinvested and become part of the capital, accelerating growth. Einstein called it 'the eighth wonder of the world'.
How much should I usually contribute?
The result depends on your situation. The key to compound interest is time: even small, steady contributions grow a lot in the long run.
Does the estimate include taxes and fees?
No. It is a projection of gross return. Taxes, inflation and product fees would reduce the final figure.