Stress Test Calculator
Heart rate zones based on age and resting pulse
Use this when you need a fast, accurate result — no sign-up, works entirely in your browser.
Estimated 1-min recovery after exercise—
Recovery fitness zone—
Tip—
How to Use
- Enter your details into the fields above.
- Click the calculate button to get your result instantly.
- Use the clear button to start a new calculation.
Example
- Resting HR 70, age 30 → Max HR 190; HRR 120; zone50 ≈ 130 bpm; zone70 ≈ 154 bpm; zone85 ≈ 172 bpm
- Resting HR 65, age 45, 12 bpm drop after test → Recovery 12 bpm; zone: Average
Formula
Max HR = 220 − age (Tanaka-adjusted max is more accurate but 220−age is the canonical reference). HRR = Max HR − Resting HR. Zone HR = Resting HR + HRR × intensity%.
About Stress Test Calculator
Heart rate zones based on age and resting pulse. This free online tool gives you fast, accurate results without registration or downloads.
Everything runs locally in your browser, so your data is never uploaded or stored — privacy first.
Frequently Asked Questions
Is this tool free to use? +
Yes, it is completely free with no registration or download required.
Is my data private? +
Yes. Everything is processed locally in your browser. Nothing is uploaded or stored on our servers.
Does it work on mobile? +
Yes, it works on any device — phone, tablet, or desktop.