Compound interest calculator: see how compounding can change savings growth
Compounding is the idea of earning interest on your original deposit, plus the interest your money has already earned. Over time, compounding can make a meaningful difference in how savings grow, especially when you leave funds untouched and give them time to build.
What this calculator helps you compare
- How two different interest rates may affect total interest earned
- How compounding frequency can influence growth over the same timeframe
- Estimated interest earned for a certificate of deposit (CD) scenario
How to use the calculator
- Enter a deposit amount for each option you want to compare.
- Choose the term length and interest rate for each scenario.
- Review the interest earned and compare outcomes side by side.
- Adjust the term or rate to see how changes impact potential growth.
Simple ways to make compounding work harder
- Start earlier if you can. Time is a key part of the compounding effect.
- Add consistent contributions when possible, even small amounts.
- Choose savings tools that match your time horizon and access needs.
Explore options that support your savings timeline
If you are comparing savings strategies, Northwest Bank offers options that can help you align growth potential with your goals and timeframe.
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This calculator provides estimates for educational purposes. Interest rates, compounding and outcomes may differ by product and market conditions.