See how your savings or investments grow over time with compound interest. Adjust compounding frequency to compare scenarios.
🇺🇸 Growth Summary
Future value
$89,331
after 10 years
Total interest earned
$31,331
Total contributions
$48,000
Effective annual rate
7.229%
A compound interest calculator shows you the remarkable power of letting your money grow on itself over time. Unlike simple interest, compound interest earns returns on both your original principal and the interest already accumulated — making it the engine behind long-term wealth building in United States and everywhere else.
Enter your initial deposit, optional monthly contributions, annual interest rate, the compounding frequency, and the investment period. The calculator shows your final balance, total interest earned, and a year-by-year breakdown of how your money grows. A visual bar shows what portion of your final balance is original deposit versus earned interest.
Investing $10,000 at 7% compounded monthly for 10 years in United States shows how powerfully your money can grow. Use the tool above to run your own scenario.
APR (Annual Percentage Rate) is the stated interest rate. APY (Annual Percentage Yield) accounts for compounding frequency — it shows your actual effective return. More frequent compounding means a higher APY than APR.
The more frequently interest compounds, the faster your money grows. Daily compounding yields slightly more than monthly, which yields more than annually. For most savings accounts, monthly compounding is standard.
US interest rates are influenced by the Federal Reserve federal funds rate. Mortgage rates and personal loan rates vary significantly by lender and credit score.
Popular lenders in United States include Chase, Bank of America, Wells Fargo, Citibank, US Bank. Always compare rates from multiple providers before committing.