Compound Interest Calculator

Enter an initial principal, annual interest rate, investment period in years, and compounding frequency to see your final amount, total interest earned, and a period-by-period growth summary. Supports annual, quarterly, monthly, and daily compounding.

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Model the scenario while it is still editable.

Change any input, compare the result, and keep the decision separate from the calculation.

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Review the scenario, understand the assumptions, and compare nearby calculations before acting.

Ways to use this calculator

  1. Calculate how 10,000,000 KRW grows at 7% annually over 10 years with monthly compounding.
  2. Compare annual vs monthly compounding on the same principal and rate.

What is compound interest?

Compound interest is interest calculated on both the initial principal and the accumulated interest from previous periods. Over time it produces exponential growth compared to simple interest.

What compounding frequencies are supported?

Annual (once per year), quarterly (4×/year), monthly (12×/year), and daily (365×/year).

Does this include additional periodic contributions?

Not in the current version. This calculator covers lump-sum principal with compound interest only.

Is this a financial recommendation?

No. This is a reference calculator only. Results are for informational purposes and do not constitute investment or financial advice.

Available when the question appears.

Reference, not advice.