How this calculator works
The starting balance compounds at the chosen frequency while monthly contributions grow using an end-of-month annuity model.
Change any input to update the estimate instantly. Your entries never leave your device.
Compound Interest Calculator
See how contributions and compounding can grow your money over time.
Your inputs
Calculation details
⌁ All calculations run locally in your browser. No data is stored.
Future value$50,969.84
Total contributions$34,000.00
Interest earned$16,969.84
Contributions are modeled at the end of each month. Returns are estimates and are not guaranteed.
Frequently asked questions
What is compound interest?
It is interest earned on both your original balance and previously earned interest.
When are contributions added?
This estimate models contributions at the end of each month.