CAGR Calculator: quick answer
Calculate compounded annual growth rate between a starting value and an ending value over time.
Start value, End value, and Years.
CAGR, Absolute growth, Ending value, and Value multiple.
Build a realistic base case, then change one assumption at a time and compare the chart and table, not only the first result.
What this calculator does
This CAGR calculator measures the constant annual growth rate that would turn a starting value into an ending value over a given period.
CAGR is useful because it turns irregular real-world performance into a standardized annual rate that is easier to compare across funds, businesses, portfolios, or revenue series.
It does not describe the path actually taken year to year. It describes the equivalent smooth annual rate.
This page is built for users who need a defensible planning answer, not just quick arithmetic. It translates "Start value", "End value", and "Years" into "CAGR", "Absolute growth", and "Ending value" so the trade-off is visible in one place instead of being hidden behind a single number.
How to use the cagr calculator
- Enter the starting value, ending value, and number of years between them.
- Use the result to compare performance across investments or business metrics with different time spans.
- Check the implied growth path if you want to visualize what a constant annual growth rate would look like.
- Start with "Start value", "End value", and "Years". Once the base case makes sense, compare one assumption at a time so you can see exactly what changes the outcome.
Formula and methodology
The calculator divides the ending value by the starting value, raises the result to the inverse of the holding period, and subtracts one.
The table and chart then rebuild a smooth annual path using the calculated CAGR.
This makes the output easier to interpret without pretending that actual year-to-year performance was smooth.
The model maps "Start value", "End value", and "Years" into "CAGR", "Absolute growth", and "Ending value" using the formulas shown on the page. Keeping those relationships visible makes it easier to separate the core economics from the optional adjustments and to understand which assumption is actually moving the answer.
Formula
The formula returns the constant annual rate that links the start and end value over the chosen time horizon.
Worked example and practical context
If an investment grows from 10,000 to 18,000 over five years, CAGR tells you the single annualized growth rate that would produce the same result.
That makes it easier to compare with another investment that may have run for seven years rather than five.
How to interpret the results
Use CAGR for normalized comparison, not for forecasting certainty. Actual returns will almost never arrive in a perfectly smooth sequence.
A higher CAGR is generally better, but only when the risk profile and cash-flow pattern are also comparable.
Read "CAGR" first, then use the other summary cards, the chart, and the detailed table to judge contributions, growth, and future purchasing power. In most finance decisions, the best option is the one that stays strong across the full picture, not just the one with the most attractive first number.
Common mistakes to avoid
- Confusing CAGR with average arithmetic return.
- Using CAGR when there are major interim cash flows that should be handled with IRR or XIRR instead.
- Treating CAGR as a guarantee of future growth.
Key terms
- CAGR
- The constant annual growth rate that would produce the same start and end value over time.
- Annualized growth
- A standardized yearly rate used to compare performance across different time spans.
Frequently asked questions
Practical answers about assumptions, results, and responsible use.