How to use the RD Calculator
- 1
Enter the amount you will deposit every month. - 2
Enter the annual interest rate offered by the bank or post office. - 3
Enter the tenure in months (usually 6 months to 10 years; the post office RD is 5 years). - 4
See the total deposited, the interest and the maturity value.
RD formula
Maturity = Σ (k = 1 to n) R × (1 + r/400)^((n − k + 1) ÷ 3)
R = monthly deposit · r = annual rate in % · n = number of months
Worked example
₹5,000 a month for 12 months at 7% a year: you deposit ₹60,000. The maturity value is ₹62,311 — interest of ₹2,311.