This Fixed Deposit (FD) Calculator works as follows:

Core Functionality:

1. Inputs:

   • Principal investment amount

   • Annual interest rate

   • Tenure (convertible to days/months/years)

   • Compounding frequency (advanced option)

Calculation Process:

1. Tenure Conversion:

   • Converts all durations to years:

     • Days → /365

     • Months → /12

     • Years remains unchanged

2. Compound Interest Formula:

    

    

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   Maturity Value = Principal × (1 + (Rate/Compounding))^(Compounding × Years)

3. Additional Calculations:

   • Total Interest = Maturity Value – Principal

   • Effective Annual Yield = (1 + (Rate/Compounding))^Compounding - 1 (annualized)

Key Features:

• Auto-converts between days/months/years

• Supports 4 compounding frequencies:

  • Yearly (1x)

  • Half-Yearly (2x)

  • Quarterly (4x)

  • Monthly (12x)

• Real-time auto-calculation

• Mobile-responsive design

• Advanced options toggle

• Number formatting (₹1,00,000.00 format)

• Error handling for empty inputs

User Flow:

1. User enters deposit details

2. System instantly calculates as values change

3. Results show:

   • Final maturity amount

   • Interest earned

   • Effective annual yield

4. Reset button clears all fields