Compound Interest Calculator

Estimate future value, total contributions, and earned interest with flexible compounding and monthly deposit options.

Calculate Compound Interest

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How Compound Interest Works

Compound interest means interest is added to the balance, and future interest is calculated on the growing total. Higher rates, longer time periods, and more frequent deposits can significantly increase the ending balance.

  • Compare monthly, quarterly, annual, or daily compounding.
  • Add monthly contributions to estimate long-term investment growth.
  • Review a yearly schedule of invested amount, interest, and balance.