About this tool
Calculate the future value of a principal earning compound interest. Adjust the annual rate, term, and compounding frequency.
Formula
A = P × (1 + r/n)^(n·t) where P=principal, r=annual rate, n=compounds per year, t=years.
Worked example
$1,000 at 5% APR compounded monthly for 10 years → $1,000 × (1 + 0.05/12)^(120) ≈ $1,647.01
Notes
Higher compounding frequency yields slightly more interest. The limit as n → ∞ is continuous compounding: A = P·e^(r·t).