Important Note : These are age-based estimates, not your measured true max heart rate. Actual HRmax can vary significantly, and medications or heart conditions can affect interpretation.

Use this Max Heart Rate Calculator to estimate your maximum heart rate (HRmax) by age using four popular formulas. It compares multiple age-based methods in one place, making it useful for cardio planning, workout zones, target heart rate estimates, and fitness tracking when you want a quick heart-rate estimate in beats per minute.

Reviewed by: AjaxCalculators Editorial Team
Last updated: May 2, 2026
Method source: Age-predicted maximum heart rate formulas from Fox, Tanaka, Gellish, and Nes
Editorial standards: AjaxCalculators Editorial Policy

What This Max Heart Rate Calculator Calculates

This calculator estimates your maximum heart rate, also called HRmax, using four common age-based formulas.

The calculator compares:

• Fox formula: 220 − age
• Tanaka formula: 208 − 0.7 × age
• Gellish formula: 207 − 0.7 × age
• Nes formula: 211 − 0.64 × age

It is designed to help you compare formulas instead of relying on just one estimate. Different formulas can produce different results for the same age, which is why this calculator shows multiple values side by side.

What Maximum Heart Rate Means

Maximum heart rate is the highest heart rate a person may reach during very hard or maximal exercise. It is usually expressed in beats per minute, or BPM.

Maximum heart rate is commonly used as a starting point for:

• target heart rate calculations
• heart rate zone estimates
• cardio intensity planning
• running, cycling, rowing, and treadmill workouts
• fitness watch or app settings

An age-based HRmax calculator estimates this number. It does not directly measure your real maximum heart rate.

How the Max Heart Rate Calculator Works

Because most people do not measure maximum heart rate in a lab or supervised exercise test, calculators often estimate it from age.

This page compares four formulas:

Fox Formula

HRmax = 220 − age

The Fox formula is the most widely recognized quick estimate. It is simple and easy to remember, but it is only a rough guide.

Tanaka Formula

HRmax = 208 − (0.7 × age)

The Tanaka equation is a commonly cited alternative age-predicted maximum heart rate formula.

Gellish Formula

HRmax = 207 − (0.7 × age)

The Gellish equation is another age-based prediction formula that often gives a value close to the Tanaka estimate.

Nes Formula

HRmax = 211 − (0.64 × age)

The Nes equation was developed from the HUNT Fitness Study and may produce a somewhat different estimate from the other methods, especially at some ages.

Formula Summary

Formula Name	Equation	Inputs Needed	Result
Fox	HRmax = 220 − age	Age in years	Estimated maximum heart rate in BPM
Tanaka	HRmax = 208 − 0.7 × age	Age in years	Estimated maximum heart rate in BPM
Gellish	HRmax = 207 − 0.7 × age	Age in years	Estimated maximum heart rate in BPM
Nes	HRmax = 211 − 0.64 × age	Age in years	Estimated maximum heart rate in BPM

Why Different Formulas Give Different Results

Each formula was developed from different data, assumptions, and statistical modeling. That means the formulas can give slightly different HRmax estimates for the same person.

Reason for Difference	Why It Matters
Different research populations	Age, health status, fitness level, and study design can affect the equation
Different statistical models	Each formula uses a different intercept or age multiplier
Age-only prediction	Age explains part of HRmax variation, but not all individual variation
Individual physiology	Two people of the same age can have different true maximum heart rates
Testing differences	Lab testing, field testing, and exercise mode can produce different HRmax values

Because of this variation, the calculator result should be treated as a planning estimate, not a guaranteed personal maximum.

Worked Example: Age 40

Suppose you are 40 years old.

Fox Formula

Step 1: Use the formula
HRmax = 220 − age

Step 2: Substitute the age
HRmax = 220 − 40

Step 3: Calculate
HRmax = 180 bpm

Tanaka Formula

Step 1: Use the formula
HRmax = 208 − (0.7 × age)

Step 2: Substitute the age
HRmax = 208 − (0.7 × 40)

Step 3: Calculate
HRmax = 208 − 28 = 180 bpm

Gellish Formula

Step 1: Use the formula
HRmax = 207 − (0.7 × age)

Step 2: Substitute the age
HRmax = 207 − (0.7 × 40)

Step 3: Calculate
HRmax = 207 − 28 = 179 bpm

Nes Formula

Step 1: Use the formula
HRmax = 211 − (0.64 × age)

Step 2: Substitute the age
HRmax = 211 − (0.64 × 40)

Step 3: Calculate
HRmax = 211 − 25.6 = 185.4 bpm

Result: For a 40-year-old, the displayed max heart rate estimate may fall in a range of about 179 to 185 bpm, depending on the formula used.

Worked Example: Age 30

Suppose you are 30 years old.

Formula	Calculation	Estimated HRmax
Fox	220 − 30	190 bpm
Tanaka	208 − (0.7 × 30)	187 bpm
Gellish	207 − (0.7 × 30)	186 bpm
Nes	211 − (0.64 × 30)	191.8 bpm

Result: For age 30, the formulas give a range of about 186 to 192 bpm.

Worked Example: Age 60

Suppose you are 60 years old.

Formula	Calculation	Estimated HRmax
Fox	220 − 60	160 bpm
Tanaka	208 − (0.7 × 60)	166 bpm
Gellish	207 − (0.7 × 60)	165 bpm
Nes	211 − (0.64 × 60)	172.6 bpm

Result: For age 60, the formulas give a range of about 160 to 173 bpm. This example shows how formulas may spread farther apart at some ages.

Using HRmax to Estimate Target Heart Rate

Maximum heart rate is often used to calculate target exercise intensity. A simple target heart rate formula is:

Target BPM = HRmax × intensity %

For example, if your estimated HRmax is 180 bpm and you want to train at 70% intensity:

Target BPM = 180 × 0.70 = 126 bpm

This is why HRmax estimates are used in target heart rate and heart rate zone calculators.

Common Intensity Ranges Based on HRmax

Many general fitness references describe exercise intensity as a percentage of maximum heart rate.

Intensity Range	Approximate % of HRmax	Common Use
Very easy	Below about 50%	Gentle movement, warm-up, or very light recovery
Moderate	About 50–70%	Steady aerobic exercise and general cardio fitness
Vigorous	About 70–85%	Harder cardio workouts and more demanding exercise
Very high intensity	Above about 85%	Short, demanding efforts that may not be suitable for everyone

These ranges are general planning references. They do not prove that a specific intensity is safe or ideal for every person.

HRmax Estimate vs Measured Maximum Heart Rate

An age-based formula estimates maximum heart rate. A measured HRmax is usually obtained during a properly designed maximal exercise test or high-effort field test.

Type	How It Is Found	Best Use	Limitation
Estimated HRmax	Age-based formula	Quick planning and beginner-friendly estimates	Can be noticeably wrong for an individual
Measured HRmax	Lab or structured field test	More individualized training zones	Maximal testing can be demanding and may require supervision
Watch-estimated HRmax	Device algorithm based on recorded workouts	Convenient training-app setup	Depends on sensor accuracy and algorithm assumptions

If you need a more precise number for performance training or medical exercise planning, a measured value from an appropriate setting is more useful than an age-only formula.

Why Your Real HRmax May Differ From the Calculator

Real maximum heart rate can vary significantly even among people of the same age.

Factor	How It May Affect HRmax or Its Usefulness
Genetics	Some people naturally have higher or lower maximum heart rates
Age	Average maximum heart rate tends to decline with age
Medication	Some medicines can lower, raise, or blunt heart-rate response
Heart or lung conditions	Medical conditions can affect safe intensity and heart-rate response
Testing mode	Running, cycling, rowing, and lab tests may produce different peak values
Fatigue or illness	You may not reach a true maximum when tired, sick, or under-recovered
Heat, altitude, and dehydration	Environmental stress can change heart-rate behavior during exercise
Sensor accuracy	Wrist heart-rate monitors can misread high-intensity efforts

For this reason, HRmax estimates should be combined with perceived effort, symptoms, training history, and professional guidance when needed.

How to Use This Max Heart Rate Calculator

1. Enter your age in years.
2. Review the HRmax estimate from each formula.
3. Compare the numbers rather than treating one formula as your guaranteed true maximum.
4. Use the result as a starting point for heart rate zone planning or target heart rate calculators.
5. Choose the formula that matches your training plan, app, coach, or preferred method if a specific one is required.
6. Consider a measured value if precise training zones or medical exercise limits matter.

How to Interpret the Result

Your result is an estimated ceiling for heart rate during very hard exercise. It is most useful as a planning reference for target heart rate zones, cardio intensity, and training effort.

Result Pattern	What It Means	Important Reminder
Different formulas give similar values	The estimates are close for your age	The value is still not guaranteed to be your true HRmax
Different formulas give a wide range	Formula choice may noticeably affect training zones	Consider using the formula required by your plan or a tested value
Estimate feels too low	Your real HRmax may be higher than the formula predicts	Do not assume without appropriate testing
Estimate feels too high	Your real HRmax may be lower, or your heart-rate response may be affected	Be cautious, especially with symptoms or medical conditions

If one formula gives a slightly higher or lower number than another, that does not automatically mean one is right and the others are wrong. It usually means heart-rate prediction is imprecise when based on age alone.

Using HRmax With Heart Rate Zones

Once you have an estimated HRmax, you can estimate training zones by applying percentages.

Zone	Example % of HRmax	Typical Training Label	General Purpose
Zone 1	50–60%	Recovery	Easy movement, warm-up, cool-down
Zone 2	60–70%	Endurance	Steady aerobic base training
Zone 3	70–80%	Tempo	Moderate-hard sustained work
Zone 4	80–90%	Threshold	Hard controlled efforts
Zone 5	90–100%	VO₂ max	Short, very intense efforts

Zone systems vary by coach, app, sport, and training philosophy. Use the zone model that matches your plan or calculator.

HRmax and the Talk Test

Heart-rate estimates are useful, but they should not be the only way you judge effort. The talk test can help cross-check exercise intensity.

Effort Cue	General Intensity	Practical Meaning
You can talk comfortably	Easy to moderate	Often suitable for recovery, warm-up, or steady aerobic work
You can talk, but not sing	Moderate	Often matches general cardio exercise
You can speak only short phrases	Vigorous	Harder training that may require more recovery
You feel chest pain, dizziness, fainting, or unusual shortness of breath	Warning sign	Stop exercising and seek appropriate medical guidance

Combining HRmax estimates with perceived effort and symptoms is safer than relying on a single BPM number alone.

When This Calculator Is Useful

This calculator is useful when you need a quick age-based estimate of maximum heart rate.

• Estimate max heart rate from age
• Compare multiple HRmax formulas side by side
• Use the result for target heart rate calculations
• Use the result for heart rate zone planning
• Plan cardio workouts by estimated intensity
• Understand why different apps may show different max-HR numbers
• Choose a starting point before using a training-zone calculator
• Compare estimated HRmax values for different ages

When You May Need More Than This Calculator

A max heart rate calculator may not be enough when medical safety, high-intensity training, or precise performance planning matters.

Use professional guidance or appropriate testing when working with:

• heart disease or cardiovascular risk
• chest pain, dizziness, fainting, or unusual shortness of breath
• known rhythm problems or palpitations
• high blood pressure or blood-pressure medication
• diabetes or blood-sugar management
• pregnancy or postpartum exercise
• chronic illness or medication-managed conditions
• returning to exercise after illness, injury, surgery, or a long break
• high-intensity interval training
• clinical rehabilitation or medically supervised exercise
• elite endurance training or lab-based performance testing

Common Mistakes to Avoid

• Treating HRmax as exact: age-based formulas estimate maximum heart rate; they do not measure it.
• Using 220 − age as the only possible method: it is common, but other formulas may produce different values.
• Ignoring formula differences: Tanaka, Gellish, Nes, and Fox may not match for the same age.
• Using estimated HRmax as medical clearance: a calculator cannot determine whether high-intensity exercise is safe for you.
• Forgetting medication effects: some medications can change heart-rate response during exercise.
• Ignoring symptoms: chest pain, dizziness, fainting, or unusual shortness of breath should not be ignored.
• Assuming a watch is always accurate: wrist heart-rate sensors can misread high-intensity workouts.
• Comparing zones without checking HRmax: different HRmax estimates create different target zones.
• Training at maximum effort too often: maximal or near-maximal exercise is demanding and requires appropriate recovery.

Important Assumptions and Limitations

• This calculator gives age-based estimates, not a directly measured true HRmax.
• The common 220 − age formula is popular because it is simple, but it is only a rough guide.
• Different formulas can give noticeably different results for the same age.
• Real maximum heart rate can vary significantly from predicted values even in healthy people of the same age.
• Medication, heart conditions, training status, genetics, and testing method can affect how useful a generic estimate is for you.
• The calculator does not diagnose fitness level, cardiovascular health, or safe exercise intensity.
• The calculator does not replace medical advice, exercise testing, personalized coaching, or clinical rehabilitation guidance.
• If you need a more precise number, direct exercise testing is better than any age-only formula.

Practical Uses of a Max Heart Rate Calculator

• Estimate maximum heart rate from age
• Compare Fox, Tanaka, Gellish, and Nes formulas
• Set an estimated max HR in a fitness watch or training app
• Use the result for target heart rate planning
• Use the result for heart rate zone calculations
• Plan cardio workouts by estimated intensity
• Understand why different formulas give different target zones
• Prepare for more detailed exercise testing or coaching discussions

References

1. American Heart Association: Target Heart Rates Chart
2. Cleveland Clinic: Heart Rate Reserve and Maximum Heart Rate Guidance
3. CERG / NTNU: HRmax Calculator and HUNT Fitness Study Overview
4. Tanaka et al.: Age-Predicted Maximal Heart Rate Revisited
5. Nes et al.: Age-Predicted Maximal Heart Rate in Healthy Subjects
6. Gellish et al.: Longitudinal Modeling of Age and Maximal Heart Rate

Related Calculators

• Heart Rate Zone Calculator
• Target Heart Rate Calculator
• Calories Burned Calculator
• Pace Calculator
• VO₂ Max Calculator
• Running Split Calculator

Frequently Asked Questions

What is maximum heart rate?

Maximum heart rate, or HRmax, is the highest heart rate a person may reach during very hard or maximal exercise. It is usually shown in beats per minute.

What formula does this Max Heart Rate Calculator use?

This calculator compares four age-based formulas: Fox, Tanaka, Gellish, and Nes.

What is the Fox max heart rate formula?

The Fox formula is HRmax = 220 − age. It is the most common quick estimate, but it is only a rough guide.

What is the Tanaka max heart rate formula?

The Tanaka formula is HRmax = 208 − 0.7 × age.

What is the Gellish max heart rate formula?

The Gellish formula is HRmax = 207 − 0.7 × age.

What is the Nes max heart rate formula?

The Nes formula is HRmax = 211 − 0.64 × age.

Why do different formulas give different maximum heart rates?

Different formulas were developed from different research data and statistical models. Age-based prediction is imprecise, so different equations can give different estimates.

Is 220 minus age accurate?

It is a common quick estimate, but it is not exact. Your real maximum heart rate may be higher or lower than 220 minus age.

Can my real maximum heart rate be different from the calculator?

Yes. Real HRmax can vary because of genetics, health status, medication, exercise mode, training history, and individual physiology.

How do I use maximum heart rate for training?

You can use HRmax to estimate target heart rates or training zones by multiplying HRmax by an intensity percentage.

Can medication affect maximum heart rate?

Yes. Some medications, especially heart and blood-pressure medications, can change heart-rate response during exercise.

Is this calculator safe for people with heart conditions?

This calculator is not medical clearance. People with heart conditions, symptoms during exercise, or heart-rate-affecting medication should ask a healthcare professional what heart-rate limits are appropriate.

How can I measure my actual maximum heart rate?

A more direct value may come from a properly designed maximal exercise test or supervised fitness assessment. Maximal testing can be demanding and may not be appropriate for everyone without medical clearance.

Should I use estimated or measured HRmax?

Estimated HRmax is useful for quick planning. Measured HRmax is usually better for precise training zones, performance planning, or clinical exercise guidance when testing is appropriate.

Disclaimer: This Max Heart Rate Calculator provides educational and fitness-planning estimates using age-predicted maximum heart rate formulas. Results depend on your age, the selected formula, rounding method, and the assumptions behind each research equation. Age-based formulas such as 220 − age, Tanaka, Gellish, and Nes are estimates only and can differ noticeably from a person’s true measured maximum heart rate. Real HRmax can vary because of genetics, fitness level, training history, testing method, health status, fatigue, heat, altitude, caffeine, and medications, especially heart or blood-pressure medicines. This calculator does not measure your maximum heart rate, diagnose fitness level, or provide medical clearance for high-intensity exercise. If you have heart disease, chest pain, dizziness, fainting, unusual shortness of breath, rhythm problems, high blood pressure, diabetes, pregnancy, chronic illness, or take medication that affects heart rate, ask a healthcare professional what exercise intensity and heart-rate limits are appropriate before using HRmax-based training targets.