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

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Max HR sourceAge (years)

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

Direct answer

Heart Rate Zone Calculator gives an instant result from your inputs. Heart rate zones help you structure training intensity. Zones are typically expressed as percentages of maximum heart rate (Max HR). Formula snapshot: We compute zone boundaries as a percentage of Max HR. Example: Max HR: 190 -> Zone ranges shown (bpm).

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 it works

A quick explanation of the logic behind the results, so you can trust what you see.

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.

Formula used

These are the core formulas and logic rules 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.

Common use cases

Below are common real-world scenarios where this calculator is useful.

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 use

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.

Common mistakes to avoid

These are the issues that most often cause confusing results.

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.

Tips and 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 common terms used in this calculator.

Zone

A heart rate intensity range used for structuring training.

bpm

Beats per minute.

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.

Is this calculator free to use?

Yes. This calculator is free to use without signup.

Can I use this calculator on mobile?

Yes. The calculator is mobile-friendly and works on desktop as well.

Last updated and references

Last updated: March 18, 2026

Reviewed by Calculator Suite Pro Editorial Team.

For sensitive health and finance topics, review official sources in addition to calculator outputs.

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