How much will my money grow?
Use this compound interest calculator to estimate how your money could grow with weekly or monthly contributions. Adjust the return rate, time horizon, and contribution amount to compare scenarios side by side.
Use this compound interest calculator to estimate how your money could grow with weekly or monthly contributions. Adjust the return rate, time horizon, and contribution amount to compare scenarios side by side.
Tip: for fair comparisons, keep the annual total the same (e.g. $50/week ≈ $216/month).
“Equal annual total” compares timing only. “Same amount” compares $X/week vs $X/month (different yearly totals).
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It’s “interest on interest” — your earnings can generate their own earnings. Over time, growth accelerates.
More frequent compounding usually increases the result slightly. In real life, investment returns aren’t paid smoothly like bank interest, but this setting helps you explore scenarios.
That’s the compounding effect — as the balance grows, the same percentage return produces bigger dollar gains.
No. This calculator is a clean model. Fees/tax/inflation can materially change outcomes, so treat results as estimates.
See How compound interest really works → for the formula and a plain-English explanation.