Compound Interest Calculator
FinanceUse this compound interest calculator to see how savings grow at different compounding frequencies — annual, quarterly, monthly or daily — with a year-by-year growth chart.
Your estimate
Estimates only — verify important figures with official sources.
How it works
Interest is added to the balance at the chosen frequency. The final amount is calculated with A = P × (1 + r/m)^(m×t), and the chart shows the balance at the end of each year.
Formula
A = P × (1 + r/m)m×t
P = principal · r = annual rate · m = compounding periods per year · t = years
Example calculation
Invest ৳100,000 at 7% per year for 10 years, compounded monthly:
- Final amount ≈ ৳200,966
- Interest earned ≈ ৳100,966
Important notes
- Rates are entered by you — the tool does not claim any specific bank rate.
- Tax on interest income is not deducted in this estimate.
Match this growth to a product with the FDR Calculator for fixed-deposit maturity.
Frequently Asked Questions
Compound interest is interest calculated on both the original principal and the interest already earned. The more frequently it compounds, the faster the balance grows.
Use the frequency your bank or product applies. Savings accounts often compound monthly or daily; fixed deposits may compound quarterly or half-yearly.
The growth chart samples the balance at the end of each year for readability, while the underlying calculation still uses the compounding frequency you selected.
Growth depends on the principal, the annual rate, the compounding frequency and the number of years. Enter your own figures above and the chart shows the balance at the end of each year.
Compound interest results are estimates and do not include taxes or fees. Confirm product terms with your financial institution.
Last updated: September 2026