Compound Interest Calculator

Compound interest is often called the most powerful force in personal finance — but it's hard to picture just from a formula. This app turns it into a simple visual: enter a starting amount, a rate, and a timeframe, and watch a chart show you how the numbers unfold. [ WHAT YOU CAN DO ] ● Full Calculation Enter an initial amount, annual interest rate, and number of years. Add regular contributions (monthly, quarterly, or yearly) to see how steady deposits add up alongside compounding. ● Choose How Often It Compounds Daily, monthly, quarterly, or yearly — compounding frequency changes the outcome, and you can compare them directly. ● See the Growth Curve A chart shows your balance over time, with the principal and the interest portion shown in different colors — so you can see exactly how much of the final total came from your own contributions versus compounding. ● Adjust for Inflation Toggle inflation adjustment to see the real, purchasing-power-adjusted value of your future balance, not just the raw number. ● Compare Two Scenarios Set up Scenario A and Scenario B side by side — different rates, different timelines — and see the difference in outcomes. ● Multiple Currencies Switch between major currencies with proper symbols, so the numbers match what you're actually working with. [ WHO THIS IS FOR ] - Comparing savings account or deposit offers before choosing one - Sketching out a retirement savings timeline - Students learning how compound interest actually works - Parents estimating how a college fund could grow with steady contributions [ WHY THIS APP ] - One clear final number, plus the full breakdown behind it - Real growth chart, not just static text - Works fully offline — your numbers never leave your device - No account, no login, no clutter [ GOOD TO KNOW ] This app visualizes compound interest calculations. It is a calculation and educational tool, not financial or investment advice — actual returns depend on real-world factors this app cannot predict. Always consult a qualified professional for investment decisions. See what steady saving could look like, one number at a time.