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See how your money grows with compound interest over time
Compound Interest Calculator projects how an initial deposit grows over time when interest is reinvested, accounting for compounding frequency, regular contributions, and the compounding period length.
Enter a principal amount, annual interest rate, compounding frequency (monthly, quarterly, annually, or other intervals), duration in years, and optional regular contributions. The tool outputs the future value of the investment, total interest earned, and a year-by-year growth breakdown.
Compound interest is the single most powerful force in personal finance, yet most people underestimate its impact because the math is non-obvious. This calculator makes the growth tangible by showing exactly how wealth accumulates over your chosen time horizon.
Forecast how savings accounts, fixed deposits, or investment portfolios grow with reinvested interest over months and years.
Model investment scenarios for clients, comparing different rates, contribution amounts, and time horizons side by side.
Understand the mechanics of compound interest by observing how changing each variable affects the final balance.
See how outstanding debt compounds over time when only minimum payments are made, clarifying the true cost of borrowing.
Deposit KSh 100,000 at 8% annual interest compounded monthly with no additional contributions. After 10 years, the balance grows to approximately KSh 221,964 — more than doubling your initial deposit.
Start with KSh 50,000 and add KSh 5,000 monthly at 10% annual interest compounded monthly over 25 years. The calculator shows the power of consistent contributions compounded over decades.
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See how your money grows with compound interest over time