Estimated Max HR
187 bpm
Percent-of-max zones.
Zone 1 (50-60%)
94-112 bpm
Zone 2 (60-70%)
112-131 bpm
Zone 3 (70-80%)
131-150 bpm
Zone 4 (80-90%)
150-168 bpm
Zone 5 (90-100%)
168-187 bpm
Heart & Health
Heart Rate Zone Calculator
Calculate training heart rate zones based on your max heart rate.
By Calculator Suite Pro Editorial Team | Last updated March 18, 2026
Use this health page for education and discussion prep, not as a diagnosis or replacement for qualified care.
Explore the Heart & Health group for nearby calculators, examples, and guide links.
About this calculator
Heart rate zones help you structure training intensity. Zones are typically expressed as percentages of maximum heart rate (Max HR).
This calculator converts a Max HR estimate into zone ranges (bpm) so you can plan easy aerobic sessions, tempo work, and high-intensity intervals.
Zone models vary. This tool uses a simple percent-of-max approach because it is easy to understand and widely used for basic training plans.
How the health estimate is built
A short explanation of the model, formula, or input logic behind the health-related estimate.
- We compute zone boundaries as a percentage of Max HR.
- Example zones: 50-60%, 60-70%, 70-80%, 80-90%, 90-100% of Max HR.
- Each zone is displayed as a bpm range (lower and upper bound).
- This is a practical method for everyday training, but not a clinical assessment.
Model, formula, and limits
These are the health-model assumptions, formulas, and interpretation limits used by this calculator.
- We compute zone boundaries as a percentage of Max HR.
- Example zones: 50-60%, 60-70%, 70-80%, 80-90%, 90-100% of Max HR.
Educational use cases
Use these examples for awareness and discussion prep, not diagnosis or treatment decisions.
- Zone 2 aerobic training planning
- Creating easy vs hard workout targets
- Planning interval session intensities
- Fitness watch and treadmill target ranges
- Remote coaching and training plans
- Comparing zones for different Max HR estimates
- Building a weekly endurance schedule
- Education (learning HR zones)
How to enter health inputs
- Enter your Max HR (or estimate it using the Max Heart Rate calculator).
- Choose a zone model (percent ranges) if available.
- Calculate to see bpm ranges for each zone.
- Use the ranges as training guidance, not medical limits.
Health interpretation mistakes
The biggest risk is treating an educational output as medical advice or ignoring missing clinical context.
- Using an unrealistic Max HR value (zones will be off).
- Training too hard in easy zones due to inaccurate estimate.
- Ignoring perceived effort and symptoms (HR is only one signal).
- Comparing zones across different zone models (they differ).
- Assuming zones are medical safety thresholds.
Health caution notes
- If you have a tested Max HR, use that instead of a formula estimate.
- Use perceived exertion and breathing as a cross-check for zones.
- For endurance base building, most time is often spent in easier zones.
- Heat, caffeine, sleep, and stress can change heart rate response on a given day.
Glossary
Quick definitions for health terms and model inputs used on this page.
Zone
A heart rate intensity range used for structuring training.
bpm
Beats per minute.
Health estimate examples
Max HR 190
Input: Max HR: 190
Output: Zone ranges shown (bpm)
Max HR 175
Input: Max HR: 175
Output: Zone ranges shown (bpm)
Compare formulas
Input: Use 220-age vs Tanaka
Output: Zones differ slightly
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FAQ
What is Zone 2?
Zone 2 is commonly an easy aerobic intensity zone (often around 60-70% of Max HR in simple models).
Do zones guarantee training results?
No. Zones are guidance. Consistency, volume, and recovery matter too.
Why does my heart rate vary day to day?
Heat, hydration, sleep, stress, and caffeine can shift heart rate response.
Should I use percent-of-max or percent-of-HR reserve?
Percent-of-max is simpler. Some athletes prefer HR reserve. Use what matches your program and devices.
Can I use zones for medical safety?
No. Zones are for training planning. If you have health concerns, consult a professional.
How do I get a better Max HR value?
A supervised test is best. Otherwise, use the Max Heart Rate calculator as a starting estimate.
Health references and update notes
Last updated: March 18, 2026
Reviewed by Calculator Suite Pro Editorial Team.
Health outputs are educational only. Use official clinical guidance and qualified professionals for decisions.
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