Compound interest

Compound interest: what it is for

The compound interest calculator shows how much your money grows over time, with an initial amount, monthly contributions and a monthly or annual rate.

The result separates how much you invested and how much came from interest.

How to use

1. Enter the initial amount and the monthly contribution.
2. Type the rate and the period.
3. See the final balance and interest earned.

When to use it

• Simulating investments and savings.
• Comparing rates.
• Planning financial goals.

Frequently asked questions

Does the calculation include taxes?

No. It's the gross return. Many investments are taxed on the gains depending on the account type and your country's rules.

Is it really free?

Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 tools are free and run right in your browser.

Similar tools