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Compound Interest Calculator

By harnessing the power of a compound interest calculator, individuals can make informed decisions and achieve their financial goals over time.As the name implies, Compound interest is the essential tool to calculate the compound interest accumulated on your savings.


Compound interest is the interest earned on both the principal amount and the accumulated interest. Essentially, it is interest on interest and it can accelerate the growth of your investments over time. Calculating compound interest can be challenging, especially without a background in finance or a strong interest in mathematics. Thankfully, numerous online tools are available to perform the calculations for you.

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Amount You Would Like To Invest?

₹ 10
₹ 1 Cr

Number Of Years You Want To Invest?

30 Years

Number Of Years Stay Invested For?

50 Years

Years you want to Invest cannot be less than Stay Invested

Expected Interest Rate (P.A.)

30 %

You may get

If you invest ₹  for
 Years at %p.a.p.m.

Invest Now

What is a Compound Interest Calculator?

A compound interest rate calculator or compound interest calculator is an online tool that helps you determine the potential earnings on an investment based on a set of parameters, such as the initial principal, the interest rate, and the compounding period. Most compound interest calculators use a simple interface that allows you to input the values, and then it does the calculations for you.

How Does Compound Interest Calculator Work?

A compound interest calculator automates the process of calculating the future value of an investment considering compound interest. You provide the calculator with key factors like:

  • Principal Amount (P): The initial amount you're investing.
  • Interest Rate (R): The annual interest rate offered on the investment (as a decimal).
  • Time Period (T): The total duration of your investment in years.
  • Compounding Frequency (n): This is how often the interest is added to the principal amount and itself starts earning interest. It can be annually, monthly, daily, etc.

How to Calculate Compound Interest?

The compound interest calculator uses a predefined formula to compute the future value (A) based on the provided inputs. The common formula is:

A = P (1 + R / n) ^ (nT)
  • Where:
  • A = Future value of the investment
  • P = Principal amount
  • R = Interest rate (as a decimal)
  • n = Number of compounding periods per year
  • T = Time period (in years)
The compound interest calculator performs the necessary calculations based on the above formula. It factors the principal amount, interest rate, compounding frequency, and investment duration to determine the total amount you will have at the end, including the accumulated interest.

How Can a Compounding Calculator Help You?

A compounding calculator is an invaluable tool for anyone interested in making informed financial decisions. It helps you comprehend the remarkable power of compound interest. A daily compound interest calculator demonstrates how even small contributions or investments can grow significantly over time when subjected to compound interest.

A compound interest calculator assists in financial planning by providing insights into the potential growth of investments or savings over time. By inputting the variables of various investment options, such as interest rates and compounding frequencies, you can compare the growth potential and make a more informed decision. It also demonstrates how small, regular contributions can grow significantly over time, encouraging people to start saving and investing early.

What is Compound Interest?

Compound interest is a concept in finance where interest is not only calculated on the initial principal but also the accumulated interest from previous periods. This compounding effect leads to exponential growth of your money over time. Unlike simple interest, where interest is calculated only on the principal amount, compound interest allows yourinvestmentor savings to grow at an accelerating rate. It is a powerful tool for building wealth and achieving long-term financial goals.

Compound Interest Example

Let us understand the working of compound interest through an example. For instance, Rahul decides to invest ₹25,000 (Principal amount - P) in a Public Provident Fund (PPF) account in India for a period of 15 years. The current interest rate offered on PPF is around 7.1% (interest rate - r) compounded annually (n = 1).

We can use the compound interest formula to calculate the maturity amount (future value - A) Rahul will receive after 15 years.

A = ₹25,000 (1 + 7.1% / 1) ^ (1 * 15)
  • Where:
  • Convert the interest rate into decimal: 7.1% = 0.071
  • Substitute the values: A = ₹25,000 (1 + 0.071 / 1) ^ (1 * 15)
  • Perform the calculation: A ≈ ₹63,193.77 (This can be done using a calculator)

By investing ₹25,000 at an annual interest rate of 7.1% compounded annually for 15 years, Rahul will earn approximately ₹38,193.77 in interest. The total maturity amount he will receive is ₹63,193.77 (₹25,000 principal + ₹38,193.77 interest).

Power of Compounding Interest Formula

The compound interest formula works by taking the principal amount (P) and multiplying it by a factor raised to the power of the product of the compounding frequency (n) and the investment time (t). This exponent term (n * t) is where the magic of compounding happens.

More Frequent Compounding (Higher n)

As the interest is compounded more often (higher n value), this exponent term increases, leading to a larger future value (A). This signifies the snowball effect of compound interest, where interest earned also earns interest over time.

Longer Investment Period (Higher t)

With a longer investment horizon (higher t value), the exponent term again grows, resulting in a significantly larger future value. This emphasizes the importance of starting investments early and letting them grow over time.

How to Use the Compound Interest Calculator Online?

Using a compound interest calculator online is an easy process. Here are the general steps to use an online calculator:

  • Step 1: Search for a Compound Interest Calculator

    There are many reputable financial websites and online tools that offer compound interest calculators. You can find them simply by searching on the internet browser.

  • Step 2: Input your Values

    Once you have chosen a compound interest calculator, you will typically see input fields for the following:

    • Principal amount: This is the initial amount of money you're investing.
    • Interest rate: Enter the annual interest rate offered on the investment (as a decimal). If it is a percentage, convert it (e.g., 5% becomes 0.05).
    • Time period: Specify the total duration of your investment in years.
    • Compounding frequency: Select how often the interest is compounded (annually, monthly, etc.). Some calculators may offer a default option.
  • Step 3: Calculate

    Once you have entered all the necessary information, click the "calculate" button or similar option.

  • Step 4: View the Results

    The compound interest calculator will display the future value (A), which represents the total amount you'll have in your investment after the specified time period, considering compound interest. Some calculators might also show you the total compound interest earned over the investment period or the breakdown of the year-by-year growth of your investment (optional).

Benefits of Using Compound Interest Calculator

Compound interest can exponentially grow your money over time, as the interest earned on your principal balance is reinvested and continues to accrue interest. Manually calculating compound interest can be both time-consuming and complex, especially when dealing with various interest rates and compounding periods. This is where a compound interest calculator proves invaluable. Here are some benefits of using the best compound interest calculator in India:

  • User-Friendly Interface

    Compound interest calculators offer a user-friendly interface, making financial planning and decision-making more accessible for everyone. These calculators are designed to be intuitive and straightforward, allowing users to input their data quickly and efficiently. With simple input fields and clear instructions, users can easily calculate compound interest without any confusion.

  • Accurate Calculations

    One of the biggest advantages of using a compound interest calculator is accuracy. When you use a calculator, you can be sure that your calculations are correct. This is important because even small mistakes in your calculations can have a big impact on your investment returns over time. A compound interest calculator ensures that you are considering all the relevant variables, such as interest rates, compounding periods, and the length of your investment horizon.

  • Time-saving

    Calculating compound interest manually can be a time-consuming process, especially if you're dealing with multiple investment accounts or different compounding periods. A calculator can save you a lot of time and effort by automating the calculations. You can enter your data into the calculator and let it do the work for you.

  • Visualize Results

    Another benefit of using a compound interest calculator is that it allows you to visualize the results of your investment. The calculator can show you how much your investment will be worth in the future based on different interest rates and compounding periods. This can help you make more informed investment decisions and plan for your financial future.

  • Reliability

    Compound interest calculators are reliable tools that accurately calculate compound interest based on the provided data. These calculators use established mathematical formulas to ensure precision and accuracy in the results. By relying on compound interest calculators, users can trust that the calculations are correct, giving them confidence in their financial planning.

  • Data Security

    Compound interest calculators are designed with robust security measures to safeguard the data input by users. Advanced encryption techniques and secure data storage protocols are commonly implemented to prevent unauthorized access and maintain confidentiality. Users can input their financial data into compound interest calculators with confidence, knowing that their information is safe and secure.

Difference Between Simple Interest and Compound Interest Calculation

Simple interest is computed solely based on the initial amount of the loan or investment, whereas compound interest is calculated based on the original amount plus any accumulated interest. Below is a simple comparison between simple and compound interest for better understanding.

FeatureSimple InterestCompound Interest
Basis for CalculationPrincipal amount onlyPrincipal amount + accumulated interest
FormulaSI = (P x R x T) / 100A = P ( 1 + R/n )^(n x T)
Principal amountRemains constant throughout the termGrows over time due to accumulated interest
Interest on InterestNoYes
ReturnsInterest earned only on the initial principal Interestearned on both the initial principal and previously accumulated interest ("interest on interest")
ApplicationsShort-term loans, some bondsSavings accounts, long-term investments

Where to Invest for Compound Interest?

Investing for compound interest is a smart way to grow your wealth over time. Compound interest is the interest generated on an investment's principal and accrued interest. It is a powerful tool that can help you to build your wealth over time. However, the question arises, where should one invest for compound interest? Here are some investment options to consider for compound interest:

High-Yield Savings Accounts

A high-yield savings account is a great option for investors who want a low-risk investment that generates compound interest. These accounts typically offer higher interest rates than traditional savings accounts, which means that you can earn more interest over time.

Certificate of Deposits (CDs)

CDs are also low-risk investment options that offer compound interest. They are a type of time deposit that requires you to keep your money in the account for a specific period of time. CDs typically offer higher interest rates than savings accounts, but they may have early withdrawal penalties.


Bonds are a type of fixed-income investment that offers compound interest. When you invest in a bond, you are essentially lending money to the issuer (such as a corporation or government agency) and receiving interest payments in return. Bonds typically offer higher interest rates than savings accounts or CDs, but they also carry some risk.

Mutual Funds and Exchange-Traded Funds (ETFs)

Mutual funds and ETFs are popular investment option that offers compound interest. These funds pool money from multiple investors and invest in a diversified portfolio of stocks, bonds, and other securities. Over time, the returns generated by these investments can generate compound interest.

Check Out Our Other Calculators

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