Heart Rate Zone Calculator
Calculate your 5 heart rate training zones based on age and resting heart rate. Uses Karvonen heart rate reserve formula. Shows BPM ranges, zone benefits, and RPE scale.
Heart Rate Zone Calculator
Calculate your 5 heart rate training zones based on age and resting heart rate.
Your Details
Measure first thing in the morning
Active recovery, improves cardiovascular base, increases blood flow to muscles.
Primary fat burning zone, builds aerobic base, improves metabolic efficiency.
Improves cardiovascular efficiency, lactate threshold, aerobic capacity.
Increases VO2 max, speed, and power. Trains body to clear lactate faster.
Develops maximum speed, power, and neuromuscular adaptations. Not sustainable.
Perceived Exertion (RPE) Scale
Frequently Asked Questions
What is the Heart Rate Zone Calculator?
The Heart Rate Zone Calculator is a free online tool that calculate your 5 heart rate training zones based on age and resting heart rate. uses karvonen heart rate reserve formula. shows bpm ranges, zone benefits, and rpe scale.. It runs entirely in your browser with no installation or sign-up needed.
What are the 5 heart rate training zones?
Zone 1 (recovery), Zone 2 (fat burning), Zone 3 (aerobic endurance), Zone 4 (anaerobic threshold), Zone 5 (maximum effort). Each zone targets different energy systems and fitness adaptations.
Which max HR formula is more accurate?
The Tanaka formula (208 - 0.7×age) is generally more accurate than the classic (220 - age) formula, especially for older adults. Both are estimates — a cardiac stress test gives the most accurate result.
Is the Heart Rate Zone Calculator free to use?
Yes, the Heart Rate Zone Calculator is 100% free with no registration, no hidden fees, and no usage limits. All processing happens locally in your browser, ensuring complete privacy.
Is my data safe with this tool?
Absolutely. The Heart Rate Zone Calculator processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.
Does the Heart Rate Zone Calculator work on mobile devices?
Yes, the Heart Rate Zone Calculator is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.
Do I need to create an account to use this tool?
No account or registration is needed. Simply open the Heart Rate Zone Calculator in your browser and start using it immediately. There are no sign-up walls or usage restrictions.
How do I use the Heart Rate Zone Calculator?
Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.
Which browsers are supported?
The Heart Rate Zone Calculator works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.
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About Heart Rate Zone Calculator
Heart Rate Zone Calculator is a free, browser-based tool in our Health & Fitness Tools collection. Everything runs locally on your device — no uploads, no sign-up, and your data stays private.