Why does Heart Rate Zone matter?

Metabolism, heart-rate zones and many health formulas change with age.

What is a good heart rate zone?

60-100 bpm; athletes are often lower

What are common heart rate zone mistakes?

Treating 220 − age as exact rather than an estimate.

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100% free · no signupRuns in your browser

Heart Rate Zone Calculator

Five training zones from max heart rate.

Best for: Use it to set heart-rate targets for runs, rides or workouts, or to keep easy days truly easy.

Complete guide

See benchmark ranges Why this result happened View assumptions

Country (units):

Input

Age

yrs

How it's calculated & sources

The Heart Rate Zone Calculator uses the standard formula for this calculation. It runs entirely in your browser, so your inputs are never uploaded. Figures are educational estimates, not professional advice — verify important decisions with a qualified expert. Last reviewed June 2026.

Key assumptions

Max HR estimated as ~220 - age
Zones are estimates

Educational estimate only — not medical advice. Consult a qualified healthcare professional for decisions about your health.

Free & no sign-up · runs entirely in your browser. Results are estimates for general information, not professional advice — verify important decisions with a qualified expert. Last reviewed June 2026.

How it works

Max HR ≈ 220 − age

Z1 50–60% · Z2 60–70% · Z3 70–80% · Z4 80–90% · Z5 90–100%

Example

Age 30 → max HR 190; Zone 2 = 114–133 bpm (fat burn).

Frequently asked questions

What is each zone for?+

Z1 warm-up · Z2 endurance · Z3 aerobic · Z4 threshold · Z5 max effort.

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Quick answers

Short, sourced answers to the questions people (and AI assistants) ask most.

What is Heart Rate Zone?: A heart-rate zone calculator estimates your maximum heart rate and the five training zones used to guide exercise intensity.
Why does Heart Rate Zone matter?: Metabolism, heart-rate zones and many health formulas change with age.
How is Heart Rate Zone calculated?: It estimates maximum heart rate (a common rule is 220 − age, or the Tanaka formula 208 − 0.7 × age) and sets zones as percentages of it: Zone 1 50–60%, Zone 2 60–70%, Zone 3 70–80%, Zone 4 80–90%, Zone 5 90–100%. Formula: Max HR ≈ 220 − age (or 208 − 0.7 × age) | Zone bpm = Max HR × zone %.
What is a good heart rate zone?: 60-100 bpm; athletes are often lower
What are common heart rate zone mistakes?: Treating 220 − age as exact rather than an estimate.
When should you use the Heart Rate Zone Calculator?: Use it to set heart-rate targets for runs, rides or workouts, or to keep easy days truly easy.

What is the Heart Rate Zone Calculator?

A heart-rate zone calculator estimates your maximum heart rate and the five training zones used to guide exercise intensity.

How the Heart Rate Zone Calculator works

It estimates maximum heart rate (a common rule is 220 − age, or the Tanaka formula 208 − 0.7 × age) and sets zones as percentages of it: Zone 1 50–60%, Zone 2 60–70%, Zone 3 70–80%, Zone 4 80–90%, Zone 5 90–100%.

Max HR ≈ 220 − age (or 208 − 0.7 × age) | Zone bpm = Max HR × zone %

Enter your age — your age in years.
Enter your heart rate — how many times your heart beats per minute.
Read the result, then change any input to compare scenarios instantly — the Heart Rate Zone Calculator recalculates as you type.

Understanding the inputs

What each value means, why it matters, and a typical range — so you can fill in the calculator with confidence.

Age

Your age in years.

Why it matters:: Metabolism, heart-rate zones and many health formulas change with age.
Typical range:: Adult formulas usually assume 18 and over.

How it affects results:

Higher: Generally a lower metabolism and maximum heart rate.
Lower: Generally a higher metabolism and maximum heart rate.

Common mistake: Using adult formulas for children, who need age-and-sex percentiles.

Heart Rate

How many times your heart beats per minute.

Why it matters:: Resting and maximum heart rate set your training zones and effort targets.
Typical range:: Resting 60 to 100 bpm; maximum is roughly 220 minus your age.

How it affects results:

Higher: A higher rate may mean exertion, stress or lower fitness.
Lower: A lower resting rate often signals better fitness.

Common mistake: Confusing resting heart rate with maximum or target heart rate.

Benchmark reference

What counts as poor, average or excellent for this metric.

Resting Heart Rate

Average

60-100 bpm

Source: General cardiology guidance · Updated June 2026

Typical values

Resting Heart Rate:: 60-100 bpm; athletes are often lower

Common interpretation errors

A lower resting rate is often fitter, not worse
Stimulants and stress raise it

What impacts results most

1.
Age (High impact)Maximum heart rate falls with age.
2.
Resting heart rate (Medium impact)Refines zones in the Karvonen method.

Key assumptions

Max HR estimated as ~220 - age
Zones are estimates

What's a typical value?

The 220 − age estimate can be off by ±10–12 bpm for an individual; for more accuracy, use heart-rate reserve (the Karvonen method) with your measured resting heart rate, or a lab/field max-HR test.

Heart-rate training zones by age (max HR ≈ 220 − age, bpm)

20	200	120–140	140–170	170–190
30	190	114–133	133–162	162–181
40	180	108–126	126–153	153–171
50	170	102–119	119–145	145–162
60	160	96–112	112–136	136–152

Worked example

Age 30 → estimated max HR ≈ 190 bpm. Zone 2 (60–70%) is about 114–133 bpm.

Common mistakes to avoid

Treating 220 − age as exact rather than an estimate.
Ignoring resting heart rate — the Karvonen (reserve) method is more personal.
Spending every session in the hard middle zones instead of polarising easy/hard.

Related concepts

How Max Heart Rate connects to the concepts around it.

Resting Heart Rate:: Heartbeats per minute at rest, a fitness marker.
Running Pace:: The time taken to cover a set distance.

Reviewed sources & methodology

Methodology: Professional Estimate · Last reviewed June 2026.

American College of Sports Medicine · Industry standard
U.S. CDC · Government / Official

Keywords: heart, rate, zones.

This tool is for general information only and is not medical advice. Consult a qualified healthcare professional for decisions about your health.

Sources: American Heart Association — Target heart rates

Reviewed by the Free Tools Galaxy editorial team · Updated June 2026 · Calculated privately in your browser.

Frequently asked questions

Is the Heart Rate Zone Calculator free to use?+

Yes. Every tool on Free Tools Galaxy is 100% free, runs in your browser and requires no signup.

How accurate is the Heart Rate Zone Calculator?+

Heart Rate Zone Calculator uses the standard heart rate zone formula in double-precision arithmetic, so the same inputs always produce the same result and you can verify any figure by hand. It is an educational estimate — real-world outcomes depend on your actual rates, rules and assumptions.

Do you store my inputs?+

No. The Heart Rate Zone Calculator runs entirely in your browser. Nothing is uploaded or saved to a server.

Can I use the Heart Rate Zone Calculator on mobile?+

Yes — the interface is fully responsive and works on phones, tablets and desktops.

What are common mistakes to avoid?+

The most frequent mistake is mixing units. Double-check your inputs use a single, consistent unit before clicking Calculate.

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Five training zones from max heart rate.

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Frequently asked questions

Continue your journey

Complete guide

Quick answers

What is the Heart Rate Zone Calculator?

How the Heart Rate Zone Calculator works

Understanding the inputs

Age

Heart Rate

Benchmark reference

Resting Heart Rate

Typical values

Common interpretation errors

What impacts results most

Key assumptions

What's a typical value?

Heart-rate training zones by age (max HR ≈ 220 − age, bpm)

Worked example

Common mistakes to avoid

Related concepts

Reviewed sources & methodology

Frequently asked questions

Explore more

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