Max Heart Rate Calculator

Q: Which max heart rate formula is the most accurate?

The Tanaka formula (208 − 0.7 × Age) is considered one of the most accurate for the general population. It was based on a meta-analysis of 351 studies and a laboratory study, 18,712 people in all. 1 For women specifically, the Gulati formula (206 − 0.88 × Age) may be more accurate. However, no formula is perfect for every person. A supervised graded exercise test in a clinic is the only way to find your exact max heart rate.

Q: Can I exceed my estimated max heart rate during exercise?

Yes, it is possible. These formulas give estimates based on averages . Some people naturally have a higher or lower max heart rate than predicted. If your heart rate monitor shows numbers above your estimated MHR during intense exercise, it does not necessarily mean something is wrong. However, if you feel dizzy, have chest pain, or feel faint, stop exercising and talk to a doctor.

Q: Why does the Gulati formula only work for women?

The Gulati formula comes from a study of 5,437 asymptomatic women, which measured mean peak heart rate at 206 − 0.88 × age and found the traditional male-based formula overestimates max heart rate for women. 2 Using a formula built from all-male or mixed data can underestimate or overestimate MHR for women. That is why Gulati created a gender-specific equation. If you select male in the calculator, this formula is automatically disabled.

Q: Is 220 minus age still a good formula to use?

The 220 minus age formula (Haskell & Fox) is simple and easy to remember, but it is not the most accurate. A study pooling data from 18,712 people found it underestimates max heart rate in older adults, and proposed 208 − 0.7 × age as a closer fit across ages. 1 Newer formulas like Tanaka or Nes are based on larger, more recent studies and tend to give better results for most people. This calculator lets you compare all of them side by side.

Q: How does age affect max heart rate?

Max heart rate decreases as you age . This happens because the heart's electrical system slows down and the heart muscle changes over time. Most formulas estimate a drop of about 0.6 to 1 beat per minute for each year of age. The MHR Decline by Age chart in this calculator shows you exactly how your estimated MHR changes from age 10 to 100 based on your selected formula.

Q: What is the target heart rate range shown in the results?

The target heart rate range shown is 50% to 85% of your estimated max heart rate, the American Heart Association's target zone, with 50 to 70% for moderate-intensity activity and 70 to 85% for vigorous activity. 5 Working out in this range helps you improve cardiovascular fitness without pushing too hard. The lower end (50%) is good for beginners and warm-ups, while the upper end (85%) is for vigorous exercise.

Q: Why do different formulas give different results?

Each formula was created using different study groups . Some studies tested young athletes, others tested older sedentary adults, and some used a mix. The math behind each equation comes from fitting a line or curve to the data from those specific groups. That is why results can differ by several beats per minute between formulas. Comparing all of them, as this calculator does, gives you a better overall picture.

Introduction

Your maximum heart rate (MHR) is the fastest your heart can beat during intense physical activity. It is one of the most important numbers in cardiology and exercise science because it helps you set safe and effective workout intensity levels. As you age, your max heart rate naturally decreases, which means the training zones that keep your heart healthy will change over time.

This Max Heart Rate Calculator estimates your MHR using seven well-known formulas, including Tanaka, Haskell & Fox, Gellish, and more. Simply enter your age and gender, choose a formula, and the tool instantly shows your estimated max heart rate, your target heart rate range for exercise, and a full breakdown of five training heart rate zones. You can also enter your height and weight to calculate your BMI alongside your results. A side-by-side formula comparison table and interactive charts make it easy to see how different methods stack up and how your MHR is expected to change with age.

Keep in mind that these formulas provide estimates based on population averages. Individual results can vary. If you take beta blockers or have a heart condition, talk to your doctor before using these numbers to guide your exercise. A supervised graded exercise test is the most accurate way to find your true maximum heart rate.

How to use our Max Heart Rate Calculator

Enter a few details about yourself below, and this calculator will estimate your maximum heart rate (MHR) using several proven formulas. It also shows your training heart rate zones and, if you provide your height and weight, your BMI.

Age (years): Type your current age. This is the main number used in every max heart rate formula. You must enter a value between 10 and 120.

Gender: Select Male or Female. Some formulas, like the Gulati formula, are designed only for women. Choosing your sex helps the calculator pick the right equations and give you more accurate results.

Primary Formula: Choose which heart rate formula you want to use as your main result. Options include Haskell & Fox, Inbar, Tanaka, Nes (HUNT), Oakland Nonlinear, Gulati (women only), and Gellish. The calculator defaults to Tanaka, which is one of the most widely accepted formulas in modern cardiology research. All formulas are compared in a table so you can see how they differ.

Beta Blocker Checkbox: Check this box if you currently take beta blockers. These medications lower your heart rate, which means standard age-based formulas will overestimate your true max heart rate. If this box is checked, a warning will appear advising you to talk to your doctor for a more accurate number.

Height (cm or ft/in): This field is optional. Enter your height in centimeters or switch to feet and inches using the unit toggle. Your height is used along with your weight to calculate your Body Mass Index (BMI).

Weight (kg or lbs): This field is also optional. Enter your weight in kilograms or switch to pounds using the unit toggle. Together with your height, this lets the calculator display your BMI and its category (underweight, normal, overweight, or obese), using the standard cut-offs of 18.5, 25 and 30.⁶

Once you have filled in your details, press the Calculate button. The calculator will display your estimated max heart rate, a target heart rate range for general exercise (the American Heart Association's 50 to 85% of maximum),⁵ a side-by-side comparison of all formulas, a visual chart, and your five training heart rate zones from recovery all the way up to VO₂ max. Press Reset at any time to return all fields to their default values.

What Is Max Heart Rate?

Your maximum heart rate (MHR) is the highest number of times your heart can beat in one minute during intense physical activity. It is one of the most important numbers in exercise science and cardiology because it helps you understand how hard your heart is working and how to exercise safely.

As you get older, your max heart rate naturally goes down. This happens because the heart's electrical system and muscle fibers change over time. A 20-year-old will have a much higher MHR than a 70-year-old, even if both are healthy and active.

How Is Max Heart Rate Calculated?

There is no single perfect formula for estimating MHR. The most well-known equation is the Haskell & Fox formula from 1971, which simply says MHR = 220 minus your age. While easy to remember, it is an average: even the best age-only equation, fitted to 3,320 measured tests, carried a standard error of 10.8 beats per minute.⁴ That's why newer formulas have been developed over the years:

Tanaka, Monahan & Seals (2001): 208 − (0.7 × Age). Based on a meta-analysis of 351 studies covering 18,712 people, in which the classic formula underestimated maximal heart rate in older adults.¹
Inbar (1994): 205.8 − (0.685 × Age). Developed from laboratory exercise testing data.
Nes / HUNT Fitness Study (2013): 211 − (0.64 × Age). Fitted to measured maximal tests in 3,320 healthy Norwegian men and women, with a standard error of 10.8 beats per minute and no difference by sex, activity level or BMI.⁴
Gulati (Women Only): 206 − (0.88 × Age). Derived from exercise tests in 5,437 asymptomatic women, in whom the traditional formula overestimated peak heart rate.²
Oakland Nonlinear: 192 − (0.007 × Age²). A curved fit from the same Oakland University data as the Gellish equation.
Gellish (2007): 207 − (0.7 × Age). Fitted by linear mixed models to 908 maximal tests in 132 people followed for 25 years.³

All of these are estimates. The only way to know your true maximum heart rate is through a graded exercise test supervised by a doctor, where you exercise at increasing intensity until your heart rate plateaus.

What Are Heart Rate Training Zones?

Once you know your estimated MHR, you can break your heart rate into five training zones. Each zone represents a percentage range of your max heart rate and serves a different purpose.

Zone 1 (50–60%): Light activity like walking. Good for warm-ups, cool-downs, and recovery days.
Zone 2 (60–70%): Easy, steady effort. This is where your body burns the most fat for fuel and builds base endurance.
Zone 3 (70–80%): Moderate effort like jogging or cycling at a steady pace. Strengthens your heart and lungs.
Zone 4 (80–90%): Hard effort near your lactate threshold. Improves speed and performance but can only be held for shorter periods.
Zone 5 (90–100%): Maximum effort like sprinting. Trains your VO₂ max and anaerobic power. Only sustainable for very short bursts.

Important Notes About Beta Blockers

If you take beta blockers (medications commonly prescribed for high blood pressure, heart failure, or irregular heartbeats), your maximum heart rate will be significantly lower than what any formula predicts. Beta blockers work by blocking adrenaline's effect on the heart, which slows the heart rate on purpose. If you are on these medications, do not rely on age-based MHR estimates for exercise planning. Instead, work with your cardiologist to determine a safe target heart rate through supervised testing. Monitoring related metrics like your QTc interval may also be part of your overall cardiac evaluation.

Why BMI Is Included

This calculator also computes your Body Mass Index (BMI) if you enter your height and weight. While BMI does not directly change your max heart rate, it gives useful context about your overall cardiovascular health. People who are significantly overweight or obese face a higher risk of heart disease, and their heart may work harder at lower exercise intensities. Knowing both your MHR and BMI together can help you and your doctor create a safer, more effective exercise plan.

Formulas used

Haskell & Fox (1971)

HR_{max} = 220 - \text{Age}

Inbar (1994)

HR_{max} = 205.8 - 0.685 \times \text{Age}

Tanaka, Monahan & Seals (2001) ¹

HR_{max} = 208 - 0.7 \times \text{Age}

Nes / HUNT Fitness Study (2013) ⁴

HR_{max} = 211 - 0.64 \times \text{Age}

Oakland Nonlinear

HR_{max} = 192 - 0.007 \times \text{Age}^{2}

Gulati (Women Only) ²

HR_{max} = 206 - 0.88 \times \text{Age}

Gellish (2007) ³

HR_{max} = 207 - 0.7 \times \text{Age}

Body Mass Index (BMI)

BMI = \frac{\text{Weight (kg)}}{\left(\frac{\text{Height (cm)}}{100}\right)^{2}}

Frequently asked questions

What is a good max heart rate for my age?

A good max heart rate depends on your age. Using the popular Tanaka formula (208 − 0.7 × Age), here are some common estimates:

Age 20: ~194 bpm
Age 30: ~187 bpm
Age 40: ~180 bpm
Age 50: ~173 bpm
Age 60: ~166 bpm
Age 70: ~159 bpm

These are averages. In the HUNT Fitness Study the age-only equation had a standard error of 10.8 beats per minute, so individual values scatter that widely around any formula.⁴

Which max heart rate formula is the most accurate?

The Tanaka formula (208 − 0.7 × Age) is considered one of the most accurate for the general population. It was based on a meta-analysis of 351 studies and a laboratory study, 18,712 people in all.¹ For women specifically, the Gulati formula (206 − 0.88 × Age) may be more accurate. However, no formula is perfect for every person. A supervised graded exercise test in a clinic is the only way to find your exact max heart rate.

Can I exceed my estimated max heart rate during exercise?

Yes, it is possible. These formulas give estimates based on averages. Some people naturally have a higher or lower max heart rate than predicted. If your heart rate monitor shows numbers above your estimated MHR during intense exercise, it does not necessarily mean something is wrong. However, if you feel dizzy, have chest pain, or feel faint, stop exercising and talk to a doctor.

Does fitness level affect my max heart rate?

No, not in a meaningful way. Your max heart rate is mainly determined by age and genetics. Being very fit does not raise or lower your MHR. What fitness does change is your resting heart rate: fit people tend to have lower resting heart rates. It also affects how quickly your heart rate recovers after exercise.

Why does the Gulati formula only work for women?

The Gulati formula comes from a study of 5,437 asymptomatic women, which measured mean peak heart rate at 206 − 0.88 × age and found the traditional male-based formula overestimates max heart rate for women.² Using a formula built from all-male or mixed data can underestimate or overestimate MHR for women. That is why Gulati created a gender-specific equation. If you select male in the calculator, this formula is automatically disabled.

Is 220 minus age still a good formula to use?

The 220 minus age formula (Haskell & Fox) is simple and easy to remember, but it is not the most accurate. A study pooling data from 18,712 people found it underestimates max heart rate in older adults, and proposed 208 − 0.7 × age as a closer fit across ages.¹ Newer formulas like Tanaka or Nes are based on larger, more recent studies and tend to give better results for most people. This calculator lets you compare all of them side by side.

What is a dangerous heart rate during exercise?

Exercising near or above your true max heart rate for extended periods can be risky, especially if you have heart disease or are not used to intense exercise. Warning signs include chest pain, severe shortness of breath, dizziness, lightheadedness, or an irregular heartbeat. If you experience any of these, stop exercising immediately and seek medical help. Most healthy people should aim to stay within 50–85% of their MHR during workouts.

How does age affect max heart rate?

Max heart rate decreases as you age. This happens because the heart's electrical system slows down and the heart muscle changes over time. Most formulas estimate a drop of about 0.6 to 1 beat per minute for each year of age. The MHR Decline by Age chart in this calculator shows you exactly how your estimated MHR changes from age 10 to 100 based on your selected formula.

What is the target heart rate range shown in the results?

The target heart rate range shown is 50% to 85% of your estimated max heart rate, the American Heart Association's target zone, with 50 to 70% for moderate-intensity activity and 70 to 85% for vigorous activity.⁵ Working out in this range helps you improve cardiovascular fitness without pushing too hard. The lower end (50%) is good for beginners and warm-ups, while the upper end (85%) is for vigorous exercise.

Why do different formulas give different results?

Each formula was created using different study groups. Some studies tested young athletes, others tested older sedentary adults, and some used a mix. The math behind each equation comes from fitting a line or curve to the data from those specific groups. That is why results can differ by several beats per minute between formulas. Comparing all of them, as this calculator does, gives you a better overall picture.

What does the Oakland Nonlinear formula do differently?

Most MHR formulas use a straight-line equation, meaning heart rate drops at a steady rate each year. The Oakland Nonlinear formula (192 − 0.007 × Age²) uses a curved equation instead. This means the drop in MHR is smaller when you are young and gets larger as you age. Some researchers believe this better reflects how the heart actually ages.

Should I use max heart rate or heart rate reserve for training zones?

This calculator uses percentage of max heart rate, which is the simpler method. Another method called heart rate reserve (Karvonen method) also factors in your resting heart rate and can be more personalized. Both methods are widely used. If you want zones based on heart rate reserve, you would need your resting heart rate as well. Many coaches use the percentage of MHR method because it is quick and easy.

How can I measure my actual max heart rate without a lab test?

A common field test involves a hard, all-out effort after a thorough warm-up. For example, run as hard as you can for 3 minutes, rest briefly, then run all-out again for 3 minutes. The highest number on your heart rate monitor near the end is close to your max. However, this method carries risk, especially for people who are older, unfit, or have health problems. A supervised lab test is always the safest and most accurate option.

Does gender make a big difference in max heart rate?

Gender has a small but real effect. In the St. James Women Take Heart study of 5,437 women, the traditional male-based calculation overestimated women's maximum heart rate for age.² This is why the Gulati formula exists specifically for women. For most unisex formulas, the difference between men and women of the same age is usually only a few beats per minute. Selecting your gender in the calculator ensures the right formulas are applied.

Sources

Tanaka H, Monahan KD, Seals DR. Age-predicted maximal heart rate revisited. Journal of the American College of Cardiology. 2001;37(1):153-156. doi:10.1016/s0735-1097(00)01054-8. Accessed September 1, 2026.

Gulati M, Shaw LJ, Thisted RA, Black HR, Bairey Merz CN, Arnsdorf MF. Heart rate response to exercise stress testing in asymptomatic women: the St. James Women Take Heart Project. Circulation. 2010;122(2):130-137. doi:10.1161/CIRCULATIONAHA.110.939249. Accessed September 1, 2026.

Gellish RL, Goslin BR, Olson RE, McDonald A, Russi GD, Moudgil VK. Longitudinal modeling of the relationship between age and maximal heart rate. Medicine & Science in Sports & Exercise. 2007;39(5):822-829. doi:10.1097/mss.0b013e31803349c6. Accessed September 4, 2026.

Nes BM, Janszky I, Wisløff U, Støylen A, Karlsen T. Age-predicted maximal heart rate in healthy subjects: The HUNT Fitness Study. Scandinavian Journal of Medicine & Science in Sports. 2013;23(6):697-704. doi:10.1111/j.1600-0838.2012.01445.x. Accessed September 4, 2026.

Target Heart Rates Chart. American Heart Association. Accessed September 4, 2026.

Body mass index. MedlinePlus, U.S. National Library of Medicine. Accessed September 4, 2026.

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