Compound Interest Calculator

A compound interest calculator helps you estimate the growth of your investments over time with compounding. By entering the principal amount, interest rate, compounding frequency, and time period, you can instantly calculate the future value and total interest earned. This tool demonstrates the power of compounding and is essential for investment planning and wealth creation.

Compound Interest Calculator

Results

Future Value: ₹ 0
Total Interest Earned: ₹ 0
Principal Amount: ₹ 0

How to Use

  1. Enter the principal amount you want to invest
  2. Input the annual interest rate offered
  3. Select the compounding frequency (annually, monthly, etc.)
  4. Specify the investment time period in years
  5. Click on the "Calculate Compound Interest" button
  6. View the future value and total interest earned
  7. Adjust values to see how compounding affects returns
  8. Compare different investment scenarios

Features

  • Instant compound interest calculation without page reload
  • Mobile-friendly responsive design
  • No external API dependencies
  • Real-time calculation as you type
  • Detailed breakdown of investment components
  • Works offline once loaded
  • Print-friendly results
  • Compatible with all modern browsers
  • Multiple compounding frequency options
  • Helps visualize the power of compounding

Formula Used

The compound interest is calculated using the formula:

A = P(1 + r/n)nt

Where:

  • A = Future value of investment/loan, including interest
  • P = Principal investment amount
  • r = Annual interest rate (decimal)
  • n = Number of times that interest is compounded per year
  • t = Time the money is invested or borrowed for, in years

Total Interest Earned = A - P

Frequently Asked Questions

What is compound interest?

Compound interest is the interest calculated on the initial principal and also on the accumulated interest of previous periods.

How is compound interest different from simple interest?

Simple interest is calculated only on the principal amount, while compound interest is calculated on both principal and accumulated interest.

What is the Rule of 72?

The Rule of 72 estimates how long it will take for an investment to double: Years to Double = 72 / Interest Rate.

How does compounding frequency affect returns?

Higher compounding frequency leads to higher returns as interest is calculated more frequently.

What is the power of compounding?

Compounding allows investments to grow exponentially over time, with returns generating their own returns.

Which investments offer compound interest?

Fixed deposits, mutual funds, stocks, bonds, and retirement accounts typically offer compound returns.

How can I maximize compound interest?

Start early, invest regularly, choose higher interest rates, and avoid frequent withdrawals.

Does compound interest apply to loans?

Yes, compound interest can work against you in loans, credit cards, and mortgages, increasing the total amount owed.

Is compound interest taxable?

Returns from compound interest are generally taxable as per applicable income tax laws.

How does inflation affect compound interest?

Inflation reduces the real value of compound returns, so it's important to factor in when planning long-term investments.