How to use this calculator
- Enter starting amount, nominal annual rate (%), number of years, compounds per year.
- Choose a display currency, then select Calculate. Results also update after a brief pause while you edit.
- Read the result with the assumptions below. Export details or save a second scenario to compare your choices.
Formula and method
Assumptions and limitations
A constant nominal rate and equal compounding periods. No contributions, fees, tax or withdrawals. Fractional years use the mathematical power convention, which may differ from a deposit contract.
Worked example
A 1,000 deposit at 10% compounded annually for two years becomes 1,210; the gain is 210.
What the result means
Compare rates using the same compounding convention. A negative rate reduces the balance; currency selection changes display labels only.
Common questions
Can I use a negative rate?
Yes, within the input bounds, provided the periodic growth factor stays positive.
Does this include deposits?
This tool isolates lump-sum compounding. Use SIP for regular monthly contributions.
Methodology and transparency
Calculation specification reviewed on 2026-10-14. Mathematical implementation is tested against independent reference fixtures. This does not imply review by a licensed financial professional. Read the testing and precision policy.
Background reference: www.investor.gov — financial method. FinanceMath implements its own calculator.