Compound interest on $500
Start: $500
→ $4.1k
See the growth
Frequently Asked Questions
What do these pages cover?
For each fixed starting amount — from $500 to $1,000,000 — a dedicated page shows how it grows through compound interest: with a live calculator, growth curve, rate comparison, and doubling time. All figures are illustrative only and not investment advice.
How is the growth calculated?
With the compound interest formula A = P·(1 + r/n)^(n·t). We default to monthly compounding; in the calculator you can set the rate, term, and frequency yourself.
What rate is realistic?
It depends on the investment. Broad stock-market indices have returned roughly 6–8% a year over the long run, savings accounts far less. Past returns are no guarantee of the future — which is why we show several rates side by side.
How much does compounding frequency matter?
Hardly at all. Moving from annual to monthly or daily compounding changes the final figure by only a fraction of a percent. The rate and the time horizon are the real levers.
Is this investment advice?
No. These pages explain the math of compound interest through examples. They are not investment, tax, or legal advice. For real decisions, consult a qualified professional.