Heart Rate Zone Calculator
Find your target heart rate zones for cardio and fat burn.
100% In-Browser • Zero Uploads
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Heart Rate Zone Calculator
Calculate your target heart rate training zones.
Maximum Heart Rate
190 BPM
Zone 1 (Very Light)
50-60% of Maximum
95 - 114 BPM
Zone 2 (Light)
60-70% of Maximum
114 - 133 BPM
Zone 3 (Moderate)
70-80% of Maximum
133 - 152 BPM
Zone 4 (Hard)
80-90% of Maximum
152 - 171 BPM
Zone 5 (Maximum)
90-100% of Maximum
171 - 190 BPM
About Heart Rate Zone Calculator
Calculate heart rate training ranges by age. Optimize your workouts for endurance and heart health.
100% Client-Side
Your files and data are processed locally in your browser memory. Never uploaded to remote servers.
Zero Login Required
Instant access with no account, no email sign-up, no passwords, and no subscription paywalls.
Instant Speed
Powered by modern WebAssembly and native web APIs for near-instant rendering and zero latency.
Privacy Guaranteed
Zero data retention, no user tracking cookies, and GDPR/HIPAA friendly. Your data remains strictly yours.
All Devices Ready
Fully responsive on desktop, tablet, and mobile devices without installing software or extensions.
How to Use
- Enter your age.
- Optionally enter your resting heart rate for the Karvonen method.
- Click Calculate to compute your Heart Rate Zone Calculator results instantly.
- View your BPM ranges for different exercise intensities.