CAGR Calculator
Use this calculator to find the compound average growth rate (CAGR) for an investment, business metric, or any value that changes over time.
Tip: CAGR smooths growth over time. It does not show volatility between periods.
What is compound average growth rate?
Compound average growth rate (usually called CAGR) is the annualized rate of return that takes a beginning value to an ending value over a set number of periods. It answers a practical question: “If growth had happened at a steady rate, what would that rate be?”
Even when real-world performance jumps up and down, CAGR gives you one clean number for comparison. This is why it is widely used for investment returns, company revenue growth, user growth in software, and long-term financial planning.
CAGR formula
For example, if an investment grows from 10,000 to 18,000 over 5 years:
That means the investment had an average compounded growth rate of about 12.47% per year.
How to use this calculator
- Enter the beginning value (starting amount).
- Enter the ending value (final amount).
- Enter the number of periods.
- Select whether the period is measured in years, quarters, or months.
- Click Calculate CAGR.
The tool returns:
- Growth rate per selected period
- Equivalent annual CAGR
- Total growth across the full time span
- Absolute change in value
Why CAGR matters
1) It makes comparisons fair
CAGR lets you compare two opportunities over different durations. If one investment ran for 3 years and another for 8, CAGR puts both on an annual basis.
2) It reflects compounding
Compounding means your gains can generate their own gains. CAGR captures that effect, unlike simple averages that can understate or overstate long-term growth.
3) It supports better planning
Retirement goals, education funds, business forecasts, and KPI targets often rely on expected long-term growth rates. CAGR is a practical planning input.
CAGR vs simple average growth rate
A simple average adds yearly returns and divides by the number of years. That can be misleading when returns vary a lot.
CAGR gives the single constant rate that links start and end values, making it better for long-term comparison.
- Simple average: easy, but may distort performance
- CAGR: realistic for compounded growth over time
Common mistakes to avoid
- Using zero or negative starting values: CAGR requires a positive beginning value.
- Ignoring timeframe: 20% over 2 years is very different from 20% over 10 years.
- Confusing CAGR with guaranteed returns: CAGR is descriptive, not predictive.
- Forgetting inflation: nominal CAGR may look strong while real purchasing power grows less.
Quick practical example
Suppose you invest 5,000 and your portfolio reaches 7,900 after 4 years. CAGR tells you the steady annual rate that would produce the same result. Enter those values and the calculator gives you the exact annualized growth rate instantly.
Frequently asked questions
Is a higher CAGR always better?
Usually yes, but risk matters. A high CAGR with extreme volatility may be less suitable than a moderate CAGR with stable behavior.
Can CAGR be negative?
Yes. If your ending value is lower than your beginning value, CAGR will be negative, indicating contraction over time.
Can I use this for business metrics?
Absolutely. You can apply CAGR to revenue, users, subscribers, website traffic, profits, or any metric measured over equal time intervals.
Final takeaway
The compound average growth rate calculator gives you a clean, decision-friendly growth metric in seconds. If you need one number to summarize long-term performance, CAGR is one of the most useful tools available.