Compound Interest Calculator
See how your money grows when interest is added back to the principal. Compare compounding frequencies and simple interest side by side.
Runs in your browser. Nothing is uploaded Free, no sign-up Works on mobile
₹
1 Lakh%
years
Final amount
₹2,15,892.50
Principal
₹1,00,000
Compound interest
₹1,15,892.50
Effective annual rate
8%
Simple interest would be
₹80,000.00
- Principal (46%)
- Interest (54%)
A = P × (1 + r/n)^(n × t), where n is the number of times interest is compounded per year.
Year-by-year growth
| Year | Interest earned | Balance |
|---|---|---|
| 1 | ₹8,000 | ₹1,08,000 |
| 2 | ₹16,640 | ₹1,16,640 |
| 3 | ₹25,971 | ₹1,25,971 |
| 4 | ₹36,049 | ₹1,36,049 |
| 5 | ₹46,933 | ₹1,46,933 |
| 6 | ₹58,687 | ₹1,58,687 |
| 7 | ₹71,382 | ₹1,71,382 |
| 8 | ₹85,093 | ₹1,85,093 |
| 9 | ₹99,900 | ₹1,99,900 |
| 10 | ₹1,15,892 | ₹2,15,892 |
How to use Compound Interest Calculator
- Enter the principal amount.
- Enter the annual interest rate and the time period.
- Choose how often interest is compounded.
- See the final amount, the interest earned and a yearly table.
Frequently asked questions
What is the compound interest formula?
A = P × (1 + r/n)^(n × t), where P is the principal, r is the annual rate as a decimal, n is the number of compounding periods per year and t is the number of years. Compound interest = A − P.
Does more frequent compounding give more interest?
Yes, but the difference is small. ₹1 lakh at 8% for 10 years becomes ₹2.159 lakh with yearly compounding and ₹2.225 lakh with daily compounding.
What is the rule of 72?
Divide 72 by the annual interest rate to estimate how many years it takes to double your money. At 8%, money doubles in about 9 years.
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