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Finance Calculators

Compound Interest Calculator

Verified formula Updated Jun 2026 Private — runs on your device

Enter details
₹
%
10 years
1 years50 years
Verified formula Private

Maturity amount

₹2,15,892

Total interest
₹1,15,892
Principal
₹1,00,000
YearBalance
1₹1,08,000
2₹1,16,640
3₹1,25,971
4₹1,36,049
5₹1,46,933
6₹1,58,687
7₹1,71,382
8₹1,85,093
9₹1,99,900
10₹2,15,892
View chart data
balance
1108000
2116640
3125971.2
4136048.9
5146932.81
6158687.43
7171382.43
8185093.02
9199900.46
10215892.5

For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.

How to use the Compound Interest Calculator

The Compound Interest Calculator works out your maturity amount, along with 2 related figures in an instant. Enter principal amount, interest rate (p.a.) and time period and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.

  1. Enter the principal amount.
  2. Enter the interest rate (p.a.).
  3. Set the time period.
  4. Choose the compounding frequency.
  5. Read off your maturity amount, together with total interest and principal — the calculator updates automatically, with no button to press.

Formula

The Compound Interest Calculator uses the formula:

Maturity amount = Principal amount × (1 + Interest rate (p.a.) ÷ 100 ÷ Compounding frequency)^(Compounding frequency × Time period)

Worked example

For example, with principal amount of ₹100,000, interest rate (p.a.) of 8%, time period of 10 years and compounding frequency of Annually, the maturity amount is ₹2,15,892.

Inputs used
Principal amount ₹100,000
Interest rate (p.a.) 8%
Time period 10 years
Compounding frequency Annually
Results
Maturity amount ₹2,15,892
Total interest ₹1,15,892
Principal ₹1,00,000

Results are estimates for educational use, not professional advice.

Key terms explained

Compound interest
Interest charged on the principal plus all previously earned interest, so the balance grows faster over time.
Interest rate
The percentage charged on a loan or paid on savings, usually quoted per year (per annum).
Principal
The original sum of money borrowed or invested, before any interest is added.
Maturity
The point at which an investment or deposit ends and its full value becomes payable.

Frequently asked questions

Compound interest is interest earned on both the principal and the interest already added to it. The formula is A = P × (1 + r/n)^(n×t), where n is how many times a year interest is compounded.

Yes. The more often interest compounds (monthly vs annually), the higher the final amount, because interest starts earning interest sooner. This calculator lets you compare frequencies.

Because interest earns further interest, the balance grows faster the longer it is invested. Small differences in rate or time can lead to large differences in the final corpus.

No. They assume a fixed rate and regular compounding with no withdrawals, fees or taxes. Real returns vary, so treat the figure as an estimate for planning.

The Compound Interest Calculator uses the formula: Maturity amount = Principal amount × (1 + Interest rate (p.a.) ÷ 100 ÷ Compounding frequency)^(Compounding frequency × Time period). For example, with principal amount of ₹100,000, interest rate (p.a.) of 8%, time period of 10 years and compounding frequency of Annually, the maturity amount is ₹2,15,892.

Enter the principal amount. Enter the interest rate (p.a.). Set the time period. Choose the compounding frequency. Read off your maturity amount, together with total interest and principal — the calculator updates automatically, with no button to press.

The Power of Compound Interest, Explained

Why compound interest is called the eighth wonder of the world — how it works, how it beats simple interest, how compounding frequency matters, and how long it takes to double your money.

3 min read

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