Interest Calculator

Calculate simple and compound interest gains across multiple time periods

Loading interest calculator...

About Interest Calculations

  • Simple vs Compound: Choose between simple interest (calculated only on principal) or compound interest (earning interest on interest)
  • Compounding frequencies: Select from daily, monthly, quarterly, semi-annually, annually, hourly, or continuous compounding to match your investment or loan terms
  • Flexible input: Enter your interest rate in any time period (annual, monthly, weekly, daily, or hourly)
  • Multiple breakdowns: See your interest gains across all time periods simultaneously
  • Effective annual rate: The calculator converts your input to an effective annual rate for comparison
  • Investment planning: Useful for understanding potential returns on investments or costs of loans
  • Compound interest power: More frequent compounding yields higher returns - most South African banks accrue interest daily
  • Time value visualization: Helps you understand how interest accumulates over different periods
  • • For informational purposes only - consult a financial advisor for personalized investment advice