Formula and method
FormulaFuture value = P(1 + r/n)ⁿᵗ.
Compounding adds earned interest to the balance, allowing later periods to earn interest on earlier interest.
Worked example
10,000 at 5% compounded monthly for 10 years grows to about 16,470.09.
How to use this calculator
- Enter the values using the labels and units shown.
- Review the live result and supporting details.
- Check the formula, example and assumptions before using the answer.
Assumptions and limits
- The rate and compounding frequency remain constant.
- Contributions, withdrawals, tax and fees are excluded.
Reference
Formula reviewed 2026-07-15