Simple & Compound interest • ✅ Free • ⚡ Instant • 🔒 No Signup
Calculate simple and compound interest on any investment or loan. Compare returns instantly.
Type the initial investment or loan amount.
Enter the annual interest rate percentage.
Enter the duration in years (or months).
Choose Simple or Compound interest and see results instantly.
This Interest Calculator computes both simple interest and compound interest on any principal amount. Whether you are calculating savings growth, investment returns, or loan interest costs, this tool gives you an instant breakdown of interest earned or paid and total final amount.