Formula and calculation method
The starting balance compounds monthly, then each regular contribution earns returns for its remaining time.
Worked example and assumptions
Try $10,000 initially, $250 per month, 7% annual return, and 10 years. Returns are projections, not guarantees, and exclude fees, taxes, and inflation.
Frequently asked questions
Is the compound interest calculator free?
Yes. It is free, requires no account, and runs directly in your browser.
Are the results exact?
The calculation follows the stated formula, but its usefulness depends on accurate inputs and the assumptions described on this page.
Does ClearCalc store my entries?
No. The values are processed in your browser and are not submitted to ClearCalc.
Important: This calculator provides general information, not financial, medical, legal, or tax advice.