Compound interest calculator

Estimate future value from principal, annual rate, compounding frequency, years, and optional regular contributions.

Uses the standard compound-interest formula with end-of-period contributions matched to the compounding cadence. Currency-agnostic: enter any unit. Rate and tenure are assumptions you can edit. Not tax or investment advice.

Any currency. Default 100000.
Nominal annual rate. Default 8.
n = compounds per year. Contributions use the same cadence.
Can be fractional (e.g. 2.5).
Default 0. End-of-period deposit each compound period (e.g. monthly if frequency is monthly).
Future value
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Total contributions
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Interest earned
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StepValue

Not tax or investment advice. Ignores fees, taxes, and inflation. Contribution cadence matches compounding frequency.