Compound Interest Calculator
Calculate Compound Interest.
Principal Amount
Rate of Interest
Time Period
Total Amount
₹1,61,051
Compound Interest Calculator – Wealth Growth helper
Compound interest is the 'interest on interest'. It is the reason why investments grow exponentially over long periods.
This calculator shows the power of compounding by comparing your principal with the final amount.
What is a Compound Interest Calculator?
It calculates future value where interest is added to the principal each period.
It is used for most financial products like FDs, Mutual Funds, and savings accounts.
How does this Compound Interest Calculator work?
The calculator uses the following formula:
A = P(1 + r)^t
- The formula calculates the amount (A) after t years.
- P is the principal amount.
- r is the annual interest rate (decimal).
- t is the time in years.
- This calculator assumes annual compounding (interest added once per year).
How to use this Compound Interest Calculator effectively
- Enter the starting principal.
- Input the rate of return.
- Set the number of years.
- Observe how the interest component eventually becomes larger than the principal.
Commonly asked questions
What is Compound Interest?
Compound Interest is the interest on a loan or deposit calculated based on both the initial principal and the accumulated interest from previous periods.
How does it differ from Simple Interest?
Simple interest is calculated only on the principal. Compound interest includes interest on interest, leading to faster growth.
What is the power of compounding?
It refers to the exponential growth of money over time as returns are reinvested to generate their own returns.
What is the compounding frequency?
It is the frequency at which interest is added to the principal (e.g., annually, semi-annually, quarterly, monthly, daily).
How does frequency affect returns?
Higher compounding frequency (e.g., monthly vs. annually) results in higher total returns because interest is added more often.
What is the formula?
A = P(1 + r/n)^(nt), where A is the amount, P is principal, r is annual rate, n is compounding frequency per year, and t is time in years.
Is it good for investments?
Yes, compound interest is highly beneficial for long-term investments as it accelerates wealth accumulation.
Is it bad for loans?
Yes, for borrowers, compound interest means debt grows faster if not paid off, as unpaid interest is added to the principal.
What is the Rule of 72?
It is a quick way to estimate the number of years required to double your money at a given annual rate of return. Years = 72 / Rate.
Does inflation impact compound interest?
Real returns are the compound interest returns adjusted for inflation. High inflation can erode the purchasing power of your gains.
Can I lose money?
Compound interest calculations assume a fixed positive rate. In market-linked investments, negative returns can compound losses.
What are examples of compound interest?
Bank fixed deposits, mutual funds (growth option), and PPF are common examples where returns compound.
How do I maximize compounding?
Start early, invest regularly, and stay invested for the long term to let the compounding effect work its magic.
Is interest taxable?
Taxation depends on the investment instrument. Some like PPF are tax-free, while FD interest is taxable.
What is CAGR?
Compound Annual Growth Rate (CAGR) is the mean annual growth rate of an investment over a specified time period longer than one year.
Does this calculator use annual compounding?
This standard calculator typically assumes annual compounding unless specified otherwise.
What is continuous compounding?
It is the theoretical limit where compounding happens at every possible instant. Formula: A = P * e^(rt).
Can I calculate for fractional years?
Yes, the formula works with fractional years (e.g., 2.5 years).
How does it help in retirement planning?
Compounding allows small regular contributions to grow into a substantial corpus over a working life of 30-35 years.
What is the difference between nominal and effective rate?
The nominal rate is the stated annual rate. The effective rate takes into account the compounding frequency and is usually higher.