What Is Simple Interest?
Simple interest is interest calculated only on the money you start with. The principal never grows, so every year adds the same amount.
Read moreCompound Interest Calculator
Compound interest earns interest on interest: A = P(1 + r/n)nt. Pick your compounding frequency, enter the principal, rate and duration, and watch the curve steepen over time.
Interest Calculator
Results update instantly as you type — all math runs in your browser.
Principal Amount
₹10,000
The amount you started with.
Total Interest Earned
₹4,898
Interest on principal plus previously credited interest.
Final Amount
₹14,898
Principal + interest after 5 years.
Growth Percent
49.0%
Total growth over the period — not an annualized return.
Model note: periodic compounding assumes a constant nominal annual rate credited monthly times per year. Real products may credit differently and may involve fees or taxes.
Dashed line marks the principal. Values are exact outputs of the calculation engine.
Growth timeline
0y5 years5 years
- Simple
- ₹14,000
- Compound
- ₹14,898
- Simple
- ₹4,000
- Compound
- ₹4,898
Value at 5 years
Principal
₹10,000
Interest earned so far
Compound advantage here
₹898
Extra interest from compounding at this point.
Why the curve bends upward
Each time interest is credited, it joins the balance. From then on it earns interest too, so every period contributes slightly more than the previous one. Over decades, this “interest on interest” can exceed the interest earned by the principal itself.
Example: ₹1,00,000 at 8% annually for 10 years grows to ₹2,15,892 — more than double, purely through compounding. How often interest is credited also matters: see the explorer below.
Compounding Frequency Explorer
Keep the principal, nominal annual rate and duration identical — only the crediting frequency changes. More frequent compounding generally produces a higher final amount under the same positive nominal rate and identical assumptions.
₹1,00,000
| Frequency | Final amount | Interest earned | vs annual |
|---|---|---|---|
| Annual (1×) | ₹2,15,892 | ₹1,15,892 | — |
| Semi-annual (2×) | ₹2,19,112 | ₹1,19,112 | +₹3,220 |
| Quarterly (4×) | ₹2,20,804 | ₹1,20,804 | +₹4,911 |
| Monthly (12×) | ₹2,21,964 | ₹1,21,964 | +₹6,072 |
| Daily (365×) | ₹2,22,535 | ₹1,22,535 | +₹6,642 |
With a constant nominal rate of 8% per year for 10 years, daily compounding earns about ₹6,642 more than annual compounding on the same ₹1,00,000. Remember: this follows the A = P(1 + r/n)nt model — not every bank or product credits interest this way.
Compound Interest Calculator for India — Daily, Monthly & Annual
A compound interest calculator shows how your balance grows when interest earns interest on itself. In India, fixed deposits, recurring deposits, and savings plans from banks like HDFC Bank use periodic compounding. A compound interest calculator india is designed around Indian rates, INR currency, and standard compounding intervals: annual, half-yearly, quarterly, monthly, or daily.
For the most frequent standard interval, use the daily compound interest calculator option (n = 365). It produces the highest final amount for a given annual rate, just below continuous compounding. Whether you are checking a hdfc compound interest calculator estimate or comparing HDFC Life savings plans with a hdfc life compound interest calculator, our independent tool lets you replicate any input, verify the result, and compare multiple banks or products without opening an account.
Learn Interest the Easy Way
Short, friendly explanations written in plain language — each card links to a full explanation with worked examples.
What Is Compound Interest?
Compound interest pays interest on your interest too. Every credited amount joins the balance and starts earning on its own — growth curves upward.
Read moreSimple Interest Formula
SI = (P × R × T) / 100. Learn what each letter means and work through a full example step by step.
Read moreCompound Interest Formula
A = P(1 + r/n)^(nt) — and what n (compounding frequency) changes in the outcome.
Read morePrincipal, Rate, Time & Amount
The four building blocks of every interest calculation: what you start with, the yearly rate, how long, and what you end with.
Read moreHow Compounding Frequency Works
Annual, quarterly, monthly or daily credit — the more often interest is credited, the more it can earn on itself.
Read moreReal-Life Examples
Worked examples for students, savers and classrooms — each with steps you can copy into the calculator.
Read moreCommon Interest Mistakes
Mixing up rate periods, ignoring compounding frequency, comparing SI to CI unfairly — see the classic errors before they cost you marks (or money).
Read more