Compound Interest Calculator
See how principal grows with compounding over time.
Guide: Compound Interest Calculator
See how savings or investments grow with this compound interest calculator. Set principal in PKR, annual rate, time horizon, and compounding frequency to project future value and interest earned. Compounding is often called the eighth wonder of finance because small rate differences, left alone for many years, widen dramatically—this tool makes that intuition concrete in rupees.
Why compounding frequency matters
Interest can be credited annually, quarterly, monthly, or daily. More frequent compounding increases the effective yield slightly when the nominal annual rate is held constant.
The formula assumes a steady rate and no withdrawals; real portfolios fluctuate with markets and fees.
Switch between monthly and annual compounding on the same nominal rate to see how much extra return more frequent crediting adds over a decade or more.
Practical uses
Use compound growth to ballpark FD-style products, long-term savings, or education funds when you want a simple “what if” baseline.
For tax-advantaged accounts or tiered bank rates, adjust inputs to match each segment or speak with a financial planner.
You can also run “what if I wait five more years?” scenarios by changing only the time input while holding rate constant, which highlights the cost of delaying savings.
Rule of 72 (sanity check)
A rough mental shortcut: divide 72 by your percentage rate to estimate doubling time in years for compound growth (it is most accurate for moderate rates).
Compare the rule’s guess to this calculator’s exact future value to build intuition without replacing precise planning.