# Compound Interest Calculator

> Free compound interest calculator. Project investment growth with monthly contributions, custom rates and compounding frequency — see future value, interest earned and a yearly breakdown.

See how your savings and investments grow over time with compound interest, monthly contributions and any compounding frequency — plus a year-by-year growth table.

- **Live tool:** https://www.toolnova.org/finance-tools/compound-interest-calculator
- **Category:** Finance Calculators (https://www.toolnova.org/finance-tools)
- **Price:** Free
- **Requirements:** Runs in a modern web browser · No signup · No install

## What this tool does

- Interactive year-by-year growth chart
- Future value, contributions & interest split
- Monthly or yearly contributions
- Annual, quarterly, monthly or daily compounding
- Inflation-adjusted (real) value + 7 currencies
- Effective annual yield & copy-results

## How to use Compound Interest Calculator

1. **Enter your starting amount** — Add your initial principal, or 0 if starting from scratch.
2. **Set the rate and term** — Enter the expected annual return and number of years.
3. **Add contributions** — Include a monthly deposit and choose a compounding frequency.
4. **Read the projection** — See future value, total interest and the yearly growth table.

## Common use cases

- Project retirement savings growth
- Plan a house-deposit savings timeline
- Compare investing monthly vs a lump sum
- See the effect of compounding frequency

## About

### The power of compounding

Compound interest means you earn interest on your interest, so balances snowball over time. This calculator combines a starting amount, a regular monthly contribution and your expected annual return, then compounds it at the frequency you choose to project the future value. The earlier you start and the more often interest compounds, the larger the final balance — the yearly table makes that growth curve easy to see.

### Model any savings goal

Use it to plan a retirement fund, a house deposit, an emergency fund or a child's education. Adjust the rate to run best-case and worst-case scenarios, change the contribution to see how much extra saving speeds you toward your goal, and compare compounding frequencies. Everything is calculated in your browser — no data is uploaded.

## FAQ

### How is compound interest calculated?

Interest is added to your balance each period, then future interest is earned on that larger balance. This tool derives an effective monthly rate from your annual rate and compounding frequency, applies it each month, and adds your contribution.

### Does it include monthly contributions?

Yes. Enter a monthly deposit and it's added every month before the next round of interest, so you see the combined effect of saving and compounding.

### What compounding frequency should I choose?

Match it to your account — savings often compound daily or monthly, while some bonds compound annually. More frequent compounding yields slightly more over time.

### Is my data saved?

No. Every calculation runs in your browser and nothing is uploaded or stored.

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