ABOUT THIS WEBSITE

A clearer view of steady saving.

Compound Interest Calculator helps you connect a few everyday choices with a longer-term picture of your savings.

What we do

Our free compound interest calculator combines a starting balance, regular contributions, a fixed rate and time. It separates the money you put in from the interest projected to accumulate, and provides a chart, a detailed schedule and downloadable results.

Our withdrawal planner tracks available money and payment shortfalls. The savings goal calculator solves for a monthly deposit and verifies its rounded result. The homepage explains the formulas and shows how to reproduce them in Excel.

How we approach the numbers

We make calculation assumptions visible, distinguish nominal annual rates from APY, and use an equal-month model for contributions. The methodology and worked examples show how the arithmetic fits together. Calculations run in your browser; there is no account to create or financial account to connect.

What the tool cannot tell you

A fixed-rate projection cannot predict investment returns, inflation, taxes or product fees. Compound Interest Calculator does not sell financial products, manage money or provide personalized financial advice. The displayed examples do not represent available offers. Read the Financial Disclaimer for the calculation limits and the Terms of Use for website conditions. The Privacy Policy and Cookies & Browser Storage notice explain how the current application handles information.

Help improve the calculator

Specific feedback is useful: the inputs you used, the result you saw and the result you expected. Send website questions or correction requests through our contact page. Please leave out private account information.