Free compound interest calculator — project savings or investment growth with custom rate, frequency, and contributions.
Compound interest
Watch your money grow — interest on interest.
Future value
Projected balance after 10 years.
Future value
$20,096.61
$10,000.00
$0.00
$10,096.61
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The QuickToolz Compound Interest Calculator projects how a lump-sum investment plus optional monthly contributions will grow over time. Pick any annual rate, compounding frequency (annual, half-yearly, quarterly, monthly, daily), and tenure — see the final balance, total interest earned, and a year-by-year breakdown.
A = P × (1 + r/n)^(n×t), where A is the final amount, P is principal, r is the annual rate, n is compounding periods per year, and t is years. With regular contributions, we add the future value of an annuity series.
"Compound interest is the eighth wonder of the world. He who understands it, earns it; he who doesn’t, pays it." — attributed to Albert Einstein.
Compounding turns time into your most valuable asset. Saving ₹5,000 a month at 12% for 30 years grows to over ₹1.7 crore — three-quarters of which is interest. Use this calculator to set realistic retirement, SIP, education, or wealth-building goals.
Everything you need, nothing you don’t. Built for speed and simplicity.
See annual balance, contributions, and interest growth.
Annual, half-yearly, quarterly, monthly, or daily compounding.
Add monthly contributions to model real-world investing.
Everything you need, nothing you don’t. Built for speed and simplicity.
Start with your lump-sum deposit (can be 0).
Got questions? We’ve got answers. Common questions about Compound Interest Calculator.
Live updates — no submit button.
Optional — model SIPs or recurring deposits.
Annual rate plus compounding frequency (annual, monthly, daily).
Choose years — see final balance and year-by-year growth.