Calculate simple interest and compound interest. See exactly how your savings or debt grows over time.
SI = (Principal × Rate × Time) / 100. Total = Principal + SI. Simple interest is calculated only on the original principal amount.
A = P × (1 + r/n)^(n×t). Where P = principal, r = annual rate, n = compounding frequency per year, t = time in years. Compound interest grows faster because interest is added to the principal each period.
Compound interest is significantly more powerful over long periods. For example, ₹1 lakh at 8% for 20 years: Simple Interest gives ₹2.6 lakh, while Compound Interest (quarterly) gives ₹4.87 lakh — nearly double!