❤️Heart Rate Zone Calculator
Calculate training heart rate zones based on age and resting HR.
🆓 Free🔒 Secure⚡ Instant📱 Mobile-friendly🚫 No signup
Calculate heart rate training zones online for free. Uses MHR and Karvonen methods.
Max HR: 190 bpm
Z1Recovery95–114 bpm
Z2Fat Burn114–133 bpm
Z3Aerobic133–152 bpm
Z4Threshold152–171 bpm
Z5Max Effort171–190 bpm
How to Use Heart Rate Zone Calculator — Step by Step
- 1Enter your age and optionally your resting heart rate
- 2Click 'Calculate Zones' — your 5 heart rate training zones are shown
- 3Zones are based on maximum heart rate (220 minus age) or Karvonen formula
- 4Use the zones to guide your cardio training intensity
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Frequently Asked Questions
Is this tool completely free?
Yes. All ToolNest tools are 100% free with no signup required, no account, and no watermarks added to output files.
Are my uploaded files secure and private?
All uploads use HTTPS encryption during transfer. Files are processed on secure isolated servers and automatically deleted within 2 hours of upload.
Does this tool work on mobile phones?
Yes. ToolNest works on any modern browser on iPhone, Android, tablet, or desktop — no app download or plugin needed.
Do I need to create an account?
No. Just open the tool, upload your file, and download the result. No email, no signup, no password.