How this calculator works
This calculator estimates savings or investment growth with compound interest and recurring monthly contributions. Enter the principal, monthly contribution, annual interest rate, compounding frequency, and time in years to see the future value. Use it for long-term savings planning, comparing different compounding frequencies, and understanding how interest builds on interest over time. The key inputs are initial investment, monthly contribution, annual rate, compounding frequency, and years. The output is the future value, total contributions, and total interest earned. Real-world applications include savings accounts, investment portfolios, retirement planning, and education fund growth. The calculator converts the annual rate and compounding frequency into an effective monthly rate, then projects principal and monthly contributions forward. It does not include taxes, advisory fees, fund expenses, or trading costs. More frequent compounding can increase growth, especially over long periods.