The excel based Sukanya Samriddhi Yojana Calculator calculates the maturity amount for your girl child. You can change the investment amount and the interest rate for each year and do various simulations.
What is the interest rate for Sukanya Samriddhi Yojana for 2019? How and when does the interest rates change? How the interest rate for SSY account has changed historically? This post answers all the above questions.