Compound Interest Calculator

Principal Amount


Rate of Interest (p.a)


Time period


Principal Amount


Total interest


Total Amount


Invested amount
Total Interest

Compound interest is a powerful financial concept that plays a significant role in growing wealth over time. Whether you're saving for the future or investing, understanding compound interest is essential.

What is Compound Interest?

Compound interest is the interest calculated on both the initial principal and the accumulated interest from previous periods. Unlike simple interest, which only applies to the principal amount, it applies on both principal amount and interest component. Therefore, compound interest allows your money to grow exponentially over time.

How Does Compound Interest Work?

The formula for compound interest is given by

Future Value = Principal x (1 + Rate)^Time


Principal : Your initial investment or loan amount.

Rate : The annual interest rate earned or charged (expressed as a decimal).

Time : The duration in years for which the interest compounds.

Zactor Tech Compound Interest Calculator

Zactor Tech provides a user-friendly compound interest calculator to make financial planning easier. Users can input their principal amount, annual interest rate, compounding frequency, and investment duration to calculate the future value of their investment accurately.
Zactor Tech employs a financial formula to calculate compound interest, represented by the formula

A = P (1 + r/n) ^ nt


P : Principal Amount

r : Compound interest Rate

n : Number of times interest compounds in a year

t : Number of years

To illustrate, suppose you invest a sum of Rs. 50,000 at an annual interest rate of 10% for five years.

The returns for the first year will be calculated as = Rs.5,000.

For the subsequent years, the interest is computed on the accumulated amount. For the second year, it is Rs. 50,000 + Rs. 5,000, resulting in Rs. 55,000. The interest for the second year is Rs. 5,500.

This process continues, with each year's interest being calculated on the cumulative amount from the previous year.

Given the complexity of manual calculations, a compound interest calculator becomes indispensable for precision. Zactor Tech offers a user-friendly compound interest calculator in India, streamlining the process and enhancing accuracy in financial computations.

As an example, consider the table below illustrating the compound interest calculation for an initial investment of Rs. 50,000 at 10% interest over five years, compounded annually:

YearPrincipal (Rs.)Interest Rate (%)Times Compounded (n)Amount (Rs.)

Benefits of Compound Interest
  1. Exponential Growth : Compound interest allows your money to grow faster as interest is earned not just on the principal but also on the accumulated interest.

  2. Wealth Accumulation : Over time, compound interest can significantly contribute to the accumulation of wealth, making it a valuable tool for long-term financial goals.

  3. Passive Income : Investments earning compound interest can generate passive income, allowing your money to work for you.


Understanding compound interest is crucial for anyone aiming to build financial security. With Zactor Tech's compound interest calculator, you can efficiently plan and visualise the growth of your investments. Use this tool wisely, and let compound interest work in your favour for a financially secure future.


The more frequent interest is compounded, the more you'll earn. However, it's essential to consider the terms of your investment and the compounding frequency that aligns with your goals.

While compound interest is a powerful tool for growing wealth, it can also work against you if you're incurring debt with high compound interest rates. Make informed financial decisions to leverage its benefits.

Don’t let your goals slip away

Start planning your roadmap today and take control of your finances.

Other Calculators


Term Insurance

Income Tax Calculator

Retirement Calculator


Mutual Fund






Car Loan EMI

Home Loan EMI

Simple Interest