Compound Interest Calculator

See how your investments grow over time

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Total Maturity Amount
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Invested Amount
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Interest Earned

💡 Compounding is the 8th wonder of the world. Start early!

Understanding Compound Interest

Compound interest allows you to earn interest on your interest, creating a snowball effect for your wealth. This calculator helps you see the impact of different compounding frequencies on your savings.

The Formula

The standard formula used for compounding is:

$$A = P \left(1 + \frac{r}{n}\right)^{nt}$$
  • A: Total Amount (Maturity)
  • P: Principal Amount
  • r: Annual interest rate (decimal)
  • n: Number of times interest compounds per year
  • t: Time in years

Frequently Asked Questions

🎯 What is compound interest with an example?

Compound interest is interest calculated on the initial principal and also on the accumulated interest of previous periods. For example, ₹1 Lakh at 10% annual compounding becomes ₹1.10 Lakh after year 1, and the next year interest is calculated on ₹1.10 Lakh, not the original ₹1 Lakh.

📈 How does compounding frequency affect returns?

The more frequently interest is compounded (e.g., monthly vs. yearly), the higher the final amount will be, as interest starts earning interest sooner.

⏳ What is the Rule of 72?

The Rule of 72 is a quick way to estimate how long it takes to double your money. Divide 72 by your interest rate (e.g., 72 / 8% = 9 years to double).

What is Compound Interest Calculator?

A Compound Interest Calculator calculates the future value of your investment where interest is earned on both principal and accumulated interest. Compounding is called the 8th wonder of the world - your money grows exponentially over time. Calculate maturity amount for FDs, RDs, mutual funds, PPF, and investment plans. Understand the power of compounding frequency (daily, monthly, quarterly, annually) and see how starting early multiplies wealth. Albert Einstein said 'Compound interest is the most powerful force in the universe'!

Formula

A = P(1 + r/n)^(nt) Where: A = Final amount, P = Principal, r = Annual rate, n = Compounding frequency, t = Time in years Compound Interest = A - P Example: ₹1L at 10% for 10 years, compounded annually = ₹2,59,374

Benefits of Using Compound Interest Calculator

Future Value Prediction – Know exact maturity amount
Compounding Frequency – Daily, monthly, quarterly, annually
Power of Time – See exponential growth over decades
Early Start Advantage – Starting 5 years early = 2x returns
Investment Comparison – Compare different rates & tenures
Free & Accurate – Perfect for financial planning
Pro Tip: Start investing EARLY to leverage compounding! ₹5,000/month from age 25-35 (10 years, ₹6L invested) = ₹1.15 Cr at 60. Same amount from 35-60 (25 years, ₹15L invested) = ₹1.04 Cr. Starting 10 years early with LESS investment = MORE money!

Frequently Asked Questions

Compound interest = Interest on interest. Year 1: ₹1L at 10% = ₹1.1L. Year 2: Interest on ₹1.1L = ₹1.21L (not ₹1.2L). Year 10 = ₹2.59L. Simple interest would give only ₹2L. Extra ₹59K is power of compounding!

₹1L at 12% for 10 years: Annual compounding = ₹3,10,585. Quarterly = ₹3,26,204. Monthly = ₹3,30,039. Daily = ₹3,31,946. More frequent compounding = higher returns, but difference is small (7% gain daily vs annual)!

Years to DOUBLE money = 72 ÷ Interest Rate. At 8%: 72/8 = 9 years to double. At 12%: 6 years. At 18%: 4 years. This rule helps you quickly estimate doubling time. ₹1L at 12% becomes ₹8L in 18 years (doubles 3 times)!

Simple: Interest only on principal. Compound: Interest on principal + accumulated interest. ₹1L at 10% for 20 years. Simple = ₹3L. Compound = ₹6.73L. Over long periods, compound interest gives 2-3x more returns!

Einstein allegedly said "Compound interest is the 8th wonder. Those who understand it, earn it. Those who don't, pay it." Monthly SIP of ₹5,000 for 30 years at 12% = ₹1.76 Cr (invested ₹18L, gains ₹1.58 Cr). Start TODAY!

At 12% SIP return: Age 25 → 60 (35 years): ₹3,000/month = ₹1.03 Cr. Age 30 → 60 (30 years): ₹5,000/month = ₹1.76 Cr. Age 40 → 60 (20 years): ₹10,000/month = ₹1.01 Cr. Earlier you start, less you need to invest!

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