Interest

Compound Interest Calculator

চক্রবৃদ্ধি সুদ ক্যালকুলেটর

See how an investment grows with compounding — or work backwards from a maturity amount to find the rate.

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years

Decimals allowed for partial years.

Compounding frequency

Assumptions used

  • Interest compounds at the chosen frequency (yearly, half-yearly, quarterly or monthly).
  • The rate entered is the nominal annual rate.
  • Time is in years; decimals are allowed for partial years.
  • Deposits and withdrawals during the term are not considered — only the opening principal.

Good to know

Choosing a compounding frequency

For the same nominal annual rate, more frequent compounding gives a slightly higher return. Many BD bank products compound monthly or quarterly — check your product's terms.

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Simple Interest Calculator

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Interest on a principal for a fixed period at a fixed rate.

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Equivalent Compound Rate

সমতুল্য চক্রবৃদ্ধি হার

Convert a flat earning rate into its equivalent compound interest rate to compare offers.

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DPS Calculator

ডিপিএস ক্যালকুলেটর

Estimate the maturity and interest of a monthly Deposit Pension Scheme — or solve for the rate.

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Frequently asked questions

What is the compound interest formula?

A = P × (1 + r/(100n))^(n×t), where P is principal, r is the annual rate, n is the compounding frequency per year, and t is the time in years.

Can I find the rate from a maturity amount?

Yes. Switch to ‘Interest Rate’ mode and enter the principal, final amount, time and frequency to estimate the equivalent annual rate.

Results are estimates for general guidance only and are not financial advice. Rates, tax rules and product terms change — always confirm the latest figures with your bank or Bangladesh Bank / National Savings before making a decision.