CAGR Calculator, Explained: How to Compare Any Investment's Real Growth Rate

Quick Answer

CAGR — compound annual growth rate — is the single steady yearly rate that would take an investment from its starting value to its ending value over a given number of years, assuming growth compounded each year. It lets you compare investments held for different lengths of time on one fair basis. The formula is: CAGR = (Ending Value ÷ Starting Value) raised to the power (1 ÷ Number of Years), minus 1.

Introduction — why "it doubled" tells you almost nothing

Two friends compare notes. One says her investment doubled. The other says his did too. They sound equally successful — until you learn the first doubling took three years and the second took nine. The first grew far faster, but the headline — "it doubled" — hides that completely. This is the problem CAGR solves. Absolute returns ("up 80%") ignore time. A single year's return ignores every other year. What investors actually want is simpler: on average, how fast did my money grow each year, smoothed over the whole period? That is CAGR. It matters most for investments that do not share a time period — a five-year fixed deposit, a seven-year-old mutual fund, an eighteen-month-old stock. It also matters when you read a fund's advertised "5-year return": that figure is almost always a CAGR. All figures below are hypothetical illustrations, not promises about any investment.

What CAGR actually means

CAGR answers a "what if" question: if your money had grown at exactly the same rate every single year, with each year's growth compounding on the last, what rate would turn your starting amount into your ending amount? "Compound" means each year's growth earns growth of its own later. "Annual" means the rate is per year, whatever the holding period. CAGR is therefore a smoothed average, not a record of what happened each year. An investment that rose 40% one year and fell 10% the next still has one CAGR — the steady rate producing the same start-to-finish result. That smoothing is both its power and its main limitation. It also only works for a single lump sum: if you added money along the way, such as monthly SIP instalments, use XIRR instead (covered below).

The formula, in three steps

You need only three inputs: starting value, ending value, and number of years. CAGR = (Ending Value / Starting Value) ^ (1 / Years) − 1. Multiply by 100 for a percentage. Step 1: Divide the ending value by the starting value. This is the total growth multiple. Step 2: Raise that multiple to the power of 1 divided by the number of years. On a phone calculator use the power button; in a spreadsheet type =(Ending/Starting)^(1/Years)-1. Step 3: Subtract 1, then multiply by 100. That is the CAGR. Two common mistakes: using the wrong year count, and including fresh deposits in the ending value. If you invested in March 2021 and checked in October 2026, that is about five and a half years — using "5" overstates the rate. And CAGR must compare the same pot of money, so exclude top-ups and add back withdrawals.

Worked examples

Example 1: ₹1,00,000 growing to ₹1,80,000 in five years gives 1.8^(1/5) − 1 = 12.47% a year. Example 2: ₹50,000 growing to ₹1,00,000 in seven years gives 2^(1/7) − 1 = 10.41% a year. Doubling sounds spectacular; 10.41% a year is the honest pace behind it. Example 3: ₹2,00,000 growing to ₹3,50,000 in six years gives 1.75^(1/6) − 1 = 9.78% a year. Notice that a 75% total gain over six years is a slower yearly pace than an 80% total gain over five years (Example 1). Total return alone would have ranked them the wrong way round. Example 4: ₹10,000 growing to ₹25,000 in ten years gives 2.5^(1/10) − 1 = 9.60% a year.

Try the calculator above on your own lump-sum investments.

CAGR vs absolute returns

Absolute return is (Ending Value − Starting Value) / Starting Value. It answers "how much did I gain in total?" CAGR answers "how fast did I gain it per year?" Confusing them leads to poor choices. Take ₹1,00,000 doubling to ₹2,00,000. As an absolute return that is 100%. As a CAGR it is 25.99% a year over three years, but only 14.87% a year over five years. A fund advertisement quoting "100% returns" without a period is therefore incomplete; always ask: over how long? The reverse trap is just as common: a 40% return over two years (about 18.32% a year) beats a 60% return over five years (about 9.86% a year), even though 60% looks bigger.

CAGR vs XIRR vs simple average

Simple average return — adding each year's percentage return and dividing by the number of years — is the weakest measure, because it ignores compounding. An investment gaining 100% one year and losing 50% the next ends where it started, yet its simple average is 25% a year. CAGR is the right measure for a single lump sum with no money added or withdrawn, and it is the standard way fund returns over one, three, five and ten years are quoted. XIRR — extended internal rate of return — is the right measure when money went in or out at different times: monthly SIPs, staggered purchases, partial withdrawals. XIRR weights each cash flow by how long it was actually invested. Rule of thumb: one deposit, one withdrawal — CAGR. Many deposits or withdrawals — XIRR.

Comparing FDs, mutual funds and stocks

Fixed deposits are the simplest case: the interest rate is known in advance, and the CAGR of a cumulative FD held to maturity is essentially its annualised yield before tax. A ₹1,00,000 FD at an assumed 7% a year for five years grows to about ₹1,40,255 — a 7% CAGR by construction, with no volatility along the way. That predictability is the FD's selling point, and also its ceiling. A mutual fund's "5-year CAGR" describes the smoothed pace of its net asset value over those five years, before tax on redemption. Two funds with the same 5-year CAGR may have taken very different paths — one steady, one with a sharp fall and recovery. Pair the CAGR with volatility and the longest period available, not just the best-looking window. Stocks are where CAGR most often misleads by smoothing. A stock that tripled in one year and then stayed flat for four years has the same 5-year CAGR as a stock that rose steadily — about 24.57% a year in both cases — but the risk of having bought at the peak was entirely different. Check the CAGR alongside the maximum fall from peak. Also note that published CAGRs are pre-tax; your personal CAGR after capital gains tax will be lower.

Inflation: the adjustment that changes the verdict

A 12% CAGR sounds strong until you ask what prices did over the same period. If inflation averaged 5% a year, the inflation-adjusted (real) CAGR is (1.12 / 1.05) − 1 = 6.67% a year — the pace at which your purchasing power actually grew. Over long periods this matters most. At 5% annual inflation, ₹1,00,000 today needs to become about ₹1,62,889 in ten years just to buy the same things — a CAGR of 5% merely stands still in real terms. An investment at 8% over that decade reaches about ₹2,15,892, real growth of only about 2.86% a year after inflation.

Where CAGR misleads: five traps

First, the cherry-picked window: a fund can look outstanding over three years and ordinary over ten, so check multiple periods. Second, the hidden path: CAGR erases volatility, and two investments with identical CAGRs can have wildly different worst falls. Third, the moving start line: measuring from a market crash gives a flattering rate, measuring from a peak gives a harsh one — always ask what the start date was. Fourth, the wrong tool for SIPs: CAGR on a portfolio built by regular instalments is mathematically wrong; use XIRR. Fifth, survivorship: published fund CAGRs cover funds that still exist, so the average of survivors looks better than the average experience of everyone who invested.

A five-step checklist

Step 1: Confirm the period — same start date, end date and year count for every figure you compare. Step 2: Confirm the inputs — lump sum only, no fresh deposits or withdrawals hidden in the ending value. Step 3: Check more than one window — one, three, five and ten years, not just the best one. Step 4: Look at the path — how far did it fall along the way, and could you have held through it? Step 5: Adjust for tax and inflation — a pre-tax, nominal CAGR is a starting point, not a verdict.

Educational content only — not financial advice. Consult a SEBI-registered investment adviser for personal guidance; investments are subject to market risk.