Compound Interest Calculator

Estimate how a one-time principal grows when earned interest is added back at the selected compounding frequency.

Time Period

Total Maturity Value

Total Interest Earned

(Compounded Yearly)

How compound interest is calculated

The calculator uses Maturity = Principal × (1 + Rate ÷ n)n × Time, where n is the number of compounding periods per year. Interest is maturity minus the starting principal.

Principal

A single starting amount; no later contributions or withdrawals are modelled.

Frequency

Choose 1, 2, 4, 12, or 365 compounding periods per year.

Time

Years, months, and days are combined into a duration measured in years.

Worked compound-interest example

For ₹1,00,000 at 10% per year for 5 years with yearly compounding, the calculator estimates:

Principal
₹1,00,000
Interest
₹61,051
Total maturity
₹1,61,051

Frequently asked questions

Why does compounding frequency change the result?

More frequent compounding adds earned interest to the balance sooner. At the same nominal annual rate, that can produce a slightly higher maturity.

Does this calculator support regular contributions?

No. It compounds one starting principal. Use the SIP or recurring-deposit calculator for regular contributions.

Are tax and inflation included?

No. Results are nominal and before tax, fees, charges, and inflation.