Heart Rate Calculator
Find your maximum heart rate, target training zones and heart rate reserve from your age and resting heart rate — free online. — free, fast and private.
How to use Heart Rate Calculator
- Enter your age to find your maximum heart rate.
- Optionally enter your resting heart rate for your heart rate reserve.
- Click Calculate Heart Rate Zones to see your training zones.
Note: this tool runs in your browser. Nothing is uploaded.
Disclaimer: this tool gives an estimate for general information only. It is not medical advice. Talk to a doctor or other qualified health professional before making any health decision.
Frequently Asked Questions
What is a good target heart rate for exercise?
For moderate exercise, aim for 50–70% of your maximum heart rate (220 minus your age); for vigorous exercise, 70–85%. A 30-year-old, for example, has a max of about 190 bpm, so moderate exercise is roughly 95–133 bpm.
Is this tool free to use?
Yes, it is 100% free with no sign-up. Your data stays in your browser.
Is my data uploaded or stored?
No. This tool runs entirely in your browser — nothing you enter is uploaded to a server.
Can I use it on my phone?
Yes, it is fully mobile-friendly and works in any modern browser on phone, tablet or computer.