Compound interest calculator online
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Calculate the future value with compound interest: enter the principal, annual interest rate, number of years and compounding period. Supports periodic contributions and a year-by-year growth table.
Formula & example
Without contributions: A = P(1 + r/n)^(n·t). With periodic contributions (end of period): A = P(1+i)^N + PMT·((1+i)^N − 1)/i, where i = r/n, N = n·t.
Example: P = 100,000,000, 6%/year, monthly compounding, 5 years → A ≈ 100,000,000 × (1.005)^60 ≈ 134,885,000 (interest ≈ 34,885,000).
Frequently asked questions
What is compound interest?
It is interest calculated on both the principal and the accumulated interest, helping money grow faster over time.
What does A = P(1+r/n)^(nt) mean?
P is the principal, r the annual interest rate, n the number of compounding periods per year, t the number of years, and A the total at the end.
Is compounding more frequently better?
Yes, monthly/daily compounding produces a higher result than yearly compounding at the same interest rate.
Results are for reference only and do not include taxes/fees; actual interest rates may change over time.
