Can agents run this deterministically?

Yes. Supply start_value, end_value, and years as JSON to receive cagr, total_return, doubling_time, and timeline deterministically.

Savings & Investing

CAGR Calculator

Calculate the compound annual growth rate of any investment from its start value, end value, and time period — with doubling time and growth chart.

Growth Analysis

CAGR

20.11%

Total Return

150.00%

Absolute Gain

$15,000.00

Doubling Time

3.8 yrs

Rule of 72: 3.6 yrs

Growth at 20.11% CAGR

Year 0Year 3Year 5

Portfolio Value

$25,000.00

⚠️ CAGR shows smoothed annualized growth and does not reflect actual year-to-year volatility. Past performance does not guarantee future results. This is not financial advice.

How to use it

Enter the start value, end value, and exact number of years using measurements taken on the same basis. If cash flows were added or removed during the period, understand that CAGR will not separate those from growth.
Read CAGR, total return, and exact doubling time. CAGR is the smoothed annual rate that would turn the start value into the end value if growth were steady.
CAGR is useful for comparing uneven histories, but it hides volatility. A 10% CAGR with severe drawdowns is very different from a stable 10% annual path.
Compare the CAGR against your benchmark, inflation, and fees before calling a strategy successful. Then use a more conservative forward return in the compound interest calculator instead of blindly projecting the backward-looking CAGR.
Re-run after each full year or once an investment period ends. Track CAGR, total return, and real return after inflation.

AI Integrations

Contract, discovery endpoints, and developer notes for agent use.

Always available for agents

Tool contract JSON

https://aifinhub.io/contracts/cagr-calculator.json

Stable input and output contract for this exact tool.

Human review

People can use the browser page to sense-check outputs and charts, but agents should still execute against the contract and discovery endpoints.

/agent-tools.json - machine-readable tool index.
/llms.txt - human-readable model discovery guide.
/.well-known/webmcp.json - WebMCP capabilities manifest.
/.well-known/ai-plugin.json - plugin-style discovery manifest.

{
  "tool": "cagr",
  "start_value": 10000,
  "end_value": 25000,
  "years": 5
}

Open tool contract JSON Open AI integrations guide

Expand developer notes

Agent playbook

Resolve CAGR Calculator from /agent-tools.json and open its contract before execution.
Validate inputs against the contract schema instead of scraping labels from the page UI.
Open the browser page only when a person wants to review charts, assumptions, or related tools.

Agent FAQ

Should ChatGPT, Claude, or another agent click through the UI?

No. Start with /agent-tools.json, then follow the tool's contract URL. The page UI is for human review, not parameter discovery.

When do tools show Quick and Advanced?

Every tool opens in Quick Start first. Advanced Controls keeps the same scenario, reveals more assumptions or diagnostics, and every tool keeps AI integrations inline below the instructions.

When should an agent still open the browser page?

Open it when a human wants to sense-check the output, review the chart, or keep exploring related tools after the calculation finishes.

Questions people usually ask

How is CAGR different from average annual return?

CAGR is the single constant rate that takes you from start to end value, smoothing out volatility. Average annual return sums yearly returns and divides, which can be misleading with volatile data.

What is the Rule of 72?

A mental shortcut: divide 72 by the annual growth rate to estimate doubling time. At 8% CAGR, your money roughly doubles in 9 years (72 ÷ 8 = 9).

Can CAGR be negative?

Yes. If the end value is lower than the start value, CAGR will be negative, indicating an annualized loss over the period.

Does CAGR account for contributions or withdrawals?

No. CAGR measures pure growth between two values. For accounts with ongoing contributions, use an internal rate of return (IRR) instead.

Related Resources

Learn the decision before you act

Every link here is tied directly to CAGR Calculator. Use the explanation, formula, examples, and benchmarks to pressure-test the calculator output from first principles.

Browse all 21 resources

Guides · 3 Comparisons · 1 Learn · 4 Tips · 4 Mistakes · 1

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Formula

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reveal the power of the Compound Annual Growth Rate (CAGR) formula. Learn how to calculate the smoothed annual growth of your investments over multiple years, understand its variables, and apply it with a clear, step-by-step example for smarter...

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