A Fixed Deposit (FD) is a type of term deposit where you invest a lump sum amount for a fixed period. Key features of FD: - One-time investment - Fixed interest rate throughout the tenure - Flexible tenure options - Safe and guaranteed returns - Interest payout options (monthly, quarterly, yearly, or at maturity) Benefits of FD: 1. Guaranteed returns 2. Fixed interest rate 3. Flexible tenure options 4. No market risk 5. Tax benefits under section 80C How to use the calculator: 1. Enter principal amount 2. Select interest rate 3. Choose tenure in years 4. Select interest payout frequency 5. View detailed breakdown of returns The calculator shows: - Total amount invested - Total interest earned - Maturity amount - Year-wise growth visualization