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.