Real Rate of Return Calculator
Calculate your inflation-adjusted (real) rate of return from a nominal return and an inflation rate using the exact Fisher equation. Add an amount and years to see what your money is worth in today's purchasing power.
Input
The investment's stated annual return before inflation.
Expected or actual annual inflation.
Optional. With years, shows the future value in nominal and today's dollars.
Optional. Investment horizon in years.
Output
| Metric | Value |
|---|---|
| No data yet | |
More ways to use this tool
REST API
curl -X POST https://api.iotools.cloud/v1/tool/real-rate-of-return-calculator \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"nominal": "7",
"inflation": "3",
"amount": "",
"years": ""
}'Swap in your own key from your account. The tool's fields are the body — no wrapper.
Ask an AI agent
Use the IOTools `real-rate-of-return-calculator` tool (Real Rate of Return Calculator) on this input:
YOUR_INPUT_HEREPaste this at any agent connected to the IOTools MCP server, then add your input.
Embed widget
<iframe
src="https://iotools.cloud/embed/real-rate-of-return-calculator/"
width="100%" height="520" frameborder="0" scrolling="no" loading="lazy"
title="Real Rate of Return Calculator — iotools.cloud"
sandbox="allow-scripts allow-forms allow-same-origin allow-downloads allow-popups allow-popups-to-escape-sandbox"
allow="clipboard-write"
style="width:100%;border:1px solid #e5e7eb;border-radius:12px;overflow:hidden"></iframe>
<script src="https://iotools.cloud/embed.js" async></script>Drop this into your own page — free, no key required, just a link back.
| Cost per API/MCP call | From 5 credits |
|---|---|
| Need more credits? | View pricing |
Also available with
Guides
The Real Rate of Return Calculator strips inflation out of an investment's return so you can see how much your purchasing power actually grows.
The formula
Real rate = (1 + nominal) ÷ (1 + inflation) − 1This is the exact Fisher equation. The common shortcut — nominal minus inflation — is shown next to it for comparison; the two drift apart as rates rise.
How to use it
- Enter the nominal return and the inflation rate, both in % per year.
- Optionally add a starting amount and number of years to see the future value both in nominal dollars and in today's dollars.
For example, a 7% return with 3% inflation is a real return of about 3.88%, so $10,000 grows to roughly $19,672 nominally but only about $14,637 in today's purchasing power after 10 years.
Everything is calculated in your browser.