Compound Interest Calculator

Easily see how your money grows over time with the power of compound interest.

Steps to use Compound Interest Calculator

Step 1: Enter the Initial Investment

• Input the starting amount you want to invest in the Initial Investment field.

Step 2: Add Monthly Contribution

• Enter the amount you plan to invest every month in the Monthly Contribution section.

Step 3: Set Interest Rate and Time Period

• Provide the Annual Interest Rate (%) and the number of Years you plan to keep the investment.

Step 4: Select Compounding Frequency

• Choose how often the interest is compounded (Monthly, Quarterly, Semi-Annually, Annually, or Daily)

Step 5: View the Results Instantly

• The calculator will automatically display the Future Balance, Total Investment, Total Interest, and Growth Percentage using a visual chart. You can also reset the values or save the chart as a JPG.

Compound Interest

• Compound interest is the process of earning interest on both your original investment and the interest already added to it.
• As your money compounds over time, each period’s growth builds on the last—allowing your investment to grow faster the longer it stays invested.

How is Compound Interest Calculated

Compound interest is calculated using the formula A = P(1 + r/n)^(n×t). It works by applying interest not only on your initial investment but also on the interest that has already been earned. The more frequently the interest is compounded, the faster your investment grows over time, giving you a total that combines both your principal and accumulated interest.

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

Where:

• A = the future value of the investment
• P = the principal balance
• r = the annual interest rate (decimal)
• n = number of times interest is compounded per year
• t = the time in years

How to Use Compound Interest Calculator

1. Initial Investment : Enter the starting amount you want to invest.
2. Monthly Contribution : (Optional) Enter any additional amount you plan to add each month.
3. Interest Rate : Set the annual interest rate of your investment.
4. Number of Years : Enter how long you plan to keep your investment growing.
5. Compounding Frequency : Choose how often the interest compounds (monthly, quarterly, annually, or daily).
6. View Results : The calculator will instantly show your total balance, total contributions, and total interest earned, along with a growth chart.

Calculate Compound Interest Example

Example 1: Suppose you invest ₹50,000 in a fixed deposit account with an annual interest rate of 6%, compounded annually, for a period of 3 years.

After the first year, the interest earned would be ₹3,000 (6% of ₹50,000). In the second year, the interest is calculated on the new balance of ₹53,000, resulting in ₹3,180 interest. This process continues each year.

Year 1:
 Initial Balance: ₹50,000
 Interest Earned: ₹50,000 * 6% = ₹3,000
 New Balance: ₹50,000 + ₹3,000 = ₹53,000

Year 2:

 Initial Balance: ₹53,000
 Interest Earned: ₹53,000 * 6% = ₹3,180
 New Balance: ₹53,000 + ₹3,180 = ₹56,180

Year 3:

 Initial Balance: ₹56,180
 Interest Earned: ₹56,180 * 6% = ₹3,370.80 (rounded off to 2 decimal places)
 New Balance: ₹56,180 + ₹3,370.80 = ₹59,550.80

After 3 years, the fixed deposit account would have a balance of ₹59,550.80.

How to Calculate Monthly Compound Interest

Here's how to calculate monthly compound interest using our compound interest formula. Monthly compound interest means that our interest is compounded 12 times per year:

1. Divide your annual interest rate (decimal) by 12 and then add one to it.
2. Raise the resulting figure to the power of the number of years multiplied by 12.
3. Multiply your step 2 result by your principal balance (P).
4. Deduct the principal balance from your step 3 result if you want just the interest.

As a formula, it looks like this:

A = P(1 + r/12)^12t

Benefits of Compound Interest

The power of compound interest becomes easy to understand when visualized over time. For example, an initial investment of $1,000 at 10% annual interest over 20 years grows much faster than with simple interest or no interest. By looking at a growth chart, you can clearly see how compounding significantly increases your wealth over time.

Compounding with Additional Deposits

Combining compound interest with regular monthly deposits is a powerful way to grow your money over time. For example, adding just Rs. 100 per month to an investment can grow your balance to Rs. 67,121 over 20 years, earning Rs. 33,121 in interest on total deposits of Rs. 34,000.

Starting contributions early allows your savings to compound more effectively, helping your wealth grow steadily over time and benefit from consistent investing.