Free Compound Interest Calculator.
Use our free compound interest calculator to estimate investment growth, total interest earned, and future value over time. Includes optional contributions.
Use this compound interest calculator to estimate how your savings or investments could grow over time. Enter your starting balance, interest rate, time period, and optional regular contributions to see the total value, total contributions, and total interest earned.
Compound Interest Calculator
Future value
—
—
Total contributions
—
Total interest earned
—
Show yearly growth table
| Year | Start | Contributions | Interest | End |
|---|
How Compound Interest Works
Compound interest is interest calculated on both the initial amount and any interest already earned. Over time, this creates exponential growth, meaning even small regular contributions can significantly increase the final value of an investment.
The calculator applies compound interest using standard financial formulas and allows you to adjust compounding frequency and contribution schedules.
What This Compound Interest Calculator Shows
With this calculator, you can calculate:
- Future value of an investment
- Total interest earned over time
- Total contributions made
- Year-by-year growth breakdown
This makes it easy to compare different scenarios and understand how time and interest rates affect long-term returns.
Example Compound Interest Calculation
If you invest £1,000 at an annual interest rate of 5%, compounded monthly, over 10 years:
- Total contributions: £1,000
- Total interest earned: approximately £647
- Final investment value: approximately £1,647
Regular monthly contributions can significantly increase the final value.
Why Use a Compound Interest Calculator?
A compound interest calculator helps you:
- Plan long-term savings and investments
- Compare different interest rates and time periods
- Understand the impact of regular contributions
- Make informed financial decisions
It is especially useful for long-term goals such as retirement planning and wealth accumulation.
Compound Interest Calculator FAQs
How accurate is this compound interest calculator?
This calculator provides estimates based on standard compound interest formulas. Actual results may vary due to fees, taxes, and changes in interest rates.
Does this calculator include regular contributions?
Yes. You can include optional regular contributions and choose how often they are added.
Can I calculate daily or monthly compounding?
Yes. The calculator supports daily, weekly, monthly, quarterly, semi-annual, and annual compounding.
Is this compound interest calculator free?
Yes. This calculator is completely free to use and does not require registration.
Disclaimer (Recommended)
This compound interest calculator is provided for informational purposes only and does not constitute financial advice. Always consider professional guidance before making investment decisions.