Compound Interest Calculator
Set your starting investment, monthly additions, and assumptions.
Final balance
$0
Total contributed
$0
Interest earned
$0
Growth on contributions
0%
Inflation-adjusted value
$0
Worked example
With the default inputs shown below, this calculator returns the following results:
| Input | Value |
|---|---|
| Initial investment ($) | $10,000 |
| Monthly contribution ($) | $200 |
| Annual return rate (%) | 8% |
| Time period (years) | 20 |
| Compound frequency | Monthly |
| Result | Value |
|---|---|
| Final balance | $167,857 |
| Total contributed | $58,000 |
| Interest earned | +$109,857 |
| Growth on contributions | 189.4% |
| Inflation-adjusted value | $92,939 |
Values shown are produced by this page in your browser; change any input to update them.
How to use the Compound Interest Calculator
- Initial investment ($) — default $10,000
- Monthly contribution ($) — default $200
- Annual return rate (%) — default 8%
- Time period (years) — default 20
- Compound frequency — default Monthly
- Press Calculate to update the results instantly.