Compound Interest Calculator
See how a lump-sum deposit or investment grows when interest is added to the balance and itself earns interest.
Maturity value
₹1,41,477.82
- Principal
- ₹1,00,000.00
- Interest earned
- ₹41,477.82
Year-by-year growth
| Year | Interest so far | Balance |
|---|---|---|
| 1 | ₹7,185.90 | ₹1,07,185.90 |
| 2 | ₹14,888.18 | ₹1,14,888.18 |
| 3 | ₹23,143.93 | ₹1,23,143.93 |
| 4 | ₹31,992.94 | ₹1,31,992.94 |
| 5 | ₹41,477.82 | ₹1,41,477.82 |
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How to use the Compound Interest Calculator
- 1Enter the principal, annual rate and number of years.
- 2Choose how often interest is compounded.
- 3Read the maturity value, total interest and yearly growth table.
Supported formats and limits
- Time up to 100 years, including fractions such as 2.5 years.
Formula and assumptions
A = P × (1 + r ÷ n)^(n × t), where P is the principal, r the annual rate as a decimal, n the number of compounding periods per year and t the time in years. Interest = A − P.
Many Indian bank fixed deposits compound quarterly. The calculation ignores tax deducted at source (TDS), inflation and premature withdrawal penalties.
Results are estimates for planning and learning. They are not financial, tax or legal advice — confirm important figures with your bank, a chartered accountant or the official source.
Frequently asked questions
What is the difference between simple and compound interest?
Simple interest is only earned on the original amount. Compound interest is also earned on interest already added, so the balance grows faster over time.
Does more frequent compounding make a big difference?
It helps slightly. At 7% for 10 years, quarterly compounding gives a little more than yearly compounding; the rate and time matter much more.