A clear result in a few inputs.
- Enter the requested values.Use consistent units and the real values for your scenario.
- Read the main result and breakdown.NumLuma recalculates immediately when an input changes.
- Check the formula and assumptions.Use the supporting context before making a real-world decision.
What this calculator does
Compound interest applies growth to both the original principal and previously accumulated interest. The amount depends on the annual rate, time horizon and how often compounding occurs, which is why the calculator keeps compounding frequency as an explicit input.
What to know before you use the result
- Future value follows A = P(1 + r/n)^(nt).
- More frequent compounding slightly increases future value when the nominal annual rate is unchanged.
- The calculator assumes a constant rate and no deposits or withdrawals.
Common mistakes to avoid
- Entering 6 instead of 0.06 in a manual formula without converting percent to decimal.
- Treating a hypothetical constant rate as a guaranteed return.
- Using this basic tool when regular contributions are part of the plan.