About this compound interest calculator
Project how a lump sum grows over time when interest compounds at a chosen frequency instead of being paid out as simple interest. Enter the principal, the annual interest rate, the number of years, and how often interest compounds, from annually down to daily, to see the final maturity amount and the interest earned on top of what you put in. Compounding more frequently at the same stated rate produces a slightly larger result, because each period's interest starts earning its own interest sooner.
How it works
Maturity amount = 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 time in years. Interest earned is the maturity amount minus the principal.
Try these examples
₹1,00,000 at 8% for 5 years, compounded monthly
Maturity amount ₹1,48,984.57 · Interest earned ₹48,984.57
₹1,000 at 10% for 1 year, compounded annually
Maturity amount ₹1,100.00 · Interest earned ₹100.00
Limitations & privacy
Assumes a fixed rate and no additional deposits or withdrawals during the period. Real accounts may compound on slightly different schedules or apply fees and taxes that reduce the effective return.
Inputs and results stay in this browser. Only tool identifiers are stored for your recently used tools. You can clear that history from the directory.
A few good questions
Why does compounding frequency matter?
More frequent compounding lets interest start earning its own interest sooner, so daily compounding yields marginally more than annual compounding at the same stated rate.
How is this different from the SIP calculator?
This tool projects a single lump-sum deposit. The SIP calculator instead projects regular monthly contributions added over time.
Can I use this for a savings account?
Yes, as a general estimate. Confirm your bank's actual compounding frequency and any fees, which can differ from the assumptions here.
Updated September 19, 2026