See how much your savings can grow with the power of compound interest. This investment calculator helps you visualize your investment's future value based on a single lump sum, interest rate, and time.
See the power of compounding on a lump sum investment.
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Use the compound interest formula with the number of times interest compounds per year. Quarterly compounding uses 4 periods per year, monthly uses 12, and daily commonly uses 365.
Example: $10,000 at 6% for 5 years compounded quarterly grows to about $13,468.55, so the compound interest earned is about $3,468.55.
A Compound Interest Calculator is a powerful tool that helps you calculate the future value of an investment. It demonstrates the "magic" of compound interest, the process where your investment generates earnings, and those earnings then generate their own earnings. It’s the phenomenon of "interest earning interest," and it's what allows a modest investment to grow significantly over a long period.
This future value calculator is designed for a single, lump-sum investment. It shows you how much your initial principal will grow based on the interest rate, time, and how often the interest is compounded. For GSC searches like cumulative interest calculator, use the total interest result to see the cumulative interest earned above your starting principal.
To determine the total future value (A) of your investment, our calculator uses the standard compound interest formula:
A = P × (1 + r/n)(nt)
Let's say you invest a lump sum and want to see its future value:
Calculation:
r = 0.08
n = 4
t = 10
A = 10,000 × (1 + 0.08 / 4)(4 × 10)
A = 10,000 × (1 + 0.02)(40)
A = 10,000 × (1.02)40
A = 10,000 × 2.20804
A = $22,080.40
After 10 years, your initial $10,000 investment would grow to $22,080.40. The Total Interest earned would be $12,080.40.
This investment growth calculator is essential for any financial planning:
The "Compounding Frequency" is a key driver of your returns. It's how often the interest you've earned is officially added to your principal, allowing it to start earning its own interest. Here is what each term means:
The Rule: The more frequent the compounding, the higher your total return will be, assuming the same annual interest rate.
Use A = P x (1 + r/n)^(n x t), where P is principal, r is the annual rate as a decimal, n is compounding periods per year, and t is years. Interest earned is A minus P.
For quarterly compounding, use n = 4 in the compound interest formula. A $10,000 investment at 6% for 5 years compounded quarterly becomes about $13,468.55.
Yes. More frequent compounding produces slightly higher future value because interest starts earning interest sooner. Daily compounding is usually higher than monthly, quarterly, or annual compounding at the same rate.
This calculator is for a single lump-sum principal. For regular monthly investments, use the SIP Calculator or Annuity Calculator because those formulas add contributions over time.
After seeing how a lump sum grows, explore how regular contributions can build wealth with our SIP Calculator or our 401(k) Calculator to plan for retirement.
Want the background and formulas behind this calculator? Read the companion guide.
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