Type in your age to see your estimated maximum heart rate and the pulse ranges that match light, moderate and vigorous effort.
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Key points
- Maximum heart rate is estimated as 208 − 0.7 × age (Tanaka and colleagues). Your true maximum can be several beats higher or lower.
- Moderate effort is about 64–76% of that maximum, the range the American College of Sports Medicine links to most health benefits.
- The talk test works without any device. If you can talk but not sing, you are working moderately.
- The “fat-burning zone” is mostly a myth. What changes body fat is regular movement plus good food over weeks, not one magic pulse range.
- Beta blockers and some other medicines lower your pulse. If you take them, rely on how the effort feels rather than on these numbers.
How to use the heart rate zones calculator
The only thing the calculator needs is your age in whole years, between 15 and 100. It does not ask for weight or sex, because the formula behind it did not differ between men and women, or between trained and untrained people.
After you press Calculate, you see four lines:
- Estimated maximum heart rate: the highest number of beats per minute your heart is likely to reach during an all-out effort. You should not try to reach it.
- Light: 57 to 63% of that maximum.
- Moderate: 64 to 76%. You can talk in full sentences but singing would be hard.
- Vigorous: 77 to 95%. You can only say a few words before needing a breath.
The calculator also shows a reminder about medicines and warning signs. Those notes matter as much as the numbers.
How to check your pulse while you move
You can use a chest strap, a smartwatch or your fingers. Wrist devices are usually reasonable for heart rate at a steady pace; they are less reliable during quick changes in effort or with an irregular heartbeat.
To count by hand, slow down briefly and place two fingers on the inside of your wrist, below the thumb. Count the beats for 15 seconds and multiply by four. Do it quickly, because your pulse starts to fall as soon as you stop.
What are the heart rate zones for your age?
The table shows what the calculator gives for common ages. Numbers are rounded to whole beats per minute.
| Age | Estimated maximum | Light (57–63%) | Moderate (64–76%) | Vigorous (77–95%) |
|---|---|---|---|---|
| 25 | 191 | 109–120 | 122–145 | 147–181 |
| 30 | 187 | 107–118 | 120–142 | 144–178 |
| 40 | 180 | 103–113 | 115–137 | 139–171 |
| 50 | 173 | 99–109 | 111–131 | 133–164 |
| 60 | 166 | 95–105 | 106–126 | 128–158 |
| 70 | 159 | 91–100 | 102–121 | 122–151 |
| 80 | 152 | 87–96 | 97–116 | 117–144 |
If you are just starting to exercise, the light range is a good place to begin. Many people find that after a few weeks of regular walks or Start workouts, the same pace pushes their pulse less high. That is your heart getting fitter.
How does extra body weight affect your heart rate?
If you live with a higher weight, your heart rate will usually climb faster at a given pace than the heart rate of a lighter person. That is expected, not a sign that something is wrong.
Moving more body mass takes more energy, and your heart pumps harder to deliver the oxygen your muscles need. Joint pain, a long break from exercise, poor sleep or warm clothing can add to that. A slow walk up a gentle slope may already put you in the moderate range.
The practical lesson: let your heart rate and breathing set the pace, not the speed on a treadmill or the pace of the person next to you. Slower is fine. If you reach the top of the moderate range on a flat walk, ease off for a minute, then carry on.
The encouraging part is how quickly the body adapts. Within a few weeks of regular activity, many people notice that the same route takes less effort, that their pulse settles faster after a hill and that their breathing is calmer. Those are signs your heart and muscles are becoming more efficient, even before any change on the scale.
Your resting heart rate
Your resting heart rate is a useful number to know as well. Measure it in the morning, sitting quietly before you get up and before coffee. For most adults it lies between 60 and 100 beats per minute.
A resting rate that slowly drops over months is often a sign of improving fitness. A resting rate that suddenly rises by more than usual for several days can point to illness, poor sleep, stress or dehydration. In that case, take it easy and talk to your doctor if it does not settle.
Why your pulse creeps up during a long session
On a longer walk or workout, heart rate tends to rise slowly even at the same pace. Warmth, sweating and tiring muscles all play a part. Do not chase the number back down by stopping completely; simply slow a little, have a drink and keep moving gently.
The talk test: the simplest guide to effort
The talk test asks one question: how easily can you speak while you move? It needs no watch, works with any medicine, and studies in heart and lung patients show it lines up well with measured intensity.
| What you can do while moving | Intensity | Effort on a 0–10 scale |
|---|---|---|
| Sing a song or chat without any change in breathing | Light | 2–4 |
| Talk in full sentences, but singing is hard; breathing is deeper | Moderate | 5–6 |
| Say only a few words before you need a breath | Vigorous | 7–8 |
| Cannot speak at all | Near maximum: slow down | 9–10 |
For most people living with obesity, the talk test is more practical than any formula. It adjusts automatically for a hot day, a hill, a bad night’s sleep or sore knees. The calculator numbers are a handy cross-check, not a rule you must hit.
A 0 to 10 effort scale works the same way. Zero is sitting still, ten is the hardest you can imagine. Moderate activity usually feels like a five or six: you know you are working, but you could keep going for a while.
How are heart rate zones calculated?
The calculator estimates maximum heart rate with 208 − 0.7 × age. It then multiplies that number by the percentages the American College of Sports Medicine (ACSM) uses to describe intensity.
Why Tanaka instead of 220 − age
The familiar “220 minus your age” rule was never based on a large, careful study. Hirofumi Tanaka, Kevin Monahan and Douglas Seals pooled 351 studies with 18,712 people and then tested the result in their own laboratory with 514 healthy adults aged 18 to 81. Both analyses gave almost the same line: about 208 − 0.7 × age.
They also found that the old rule overestimates maximum heart rate in young adults and underestimates it more and more after about age 40. At 70, the difference is around 10 beats per minute. For an older person, that can mean an exercise plan set too gently.
| Age | 220 − age | 208 − 0.7 × age |
|---|---|---|
| 30 | 190 | 187 |
| 40 | 180 | 180 |
| 60 | 160 | 166 |
| 70 | 150 | 159 |
Many websites, including the American Heart Association’s target heart rate chart, still use 220 − age with slightly different percentages. Neither formula is wrong for everyday use; they are both averages. We chose Tanaka because it rests on more data, especially for older adults.
Where the zone percentages come from
The ranges come from the ACSM position stand on the quantity and quality of exercise (Garber and colleagues). It sorts intensity into very light, light, moderate, vigorous and near-maximal bands, using percentages of maximum heart rate alongside other measures such as METs and perceived effort.
The calculator shows the three bands that matter for everyday training. Below 57% counts as very light; above 95% is near your limit and not something to aim for.
Is the fat-burning zone a myth?
Many gym machines show a “fat-burn” band at a low heart rate and a “cardio” band above it. The idea is that gentle exercise burns more fat. It is half true and mostly misleading.
What is true: at low and moderate effort, your muscles get a larger share of their fuel from fat. Researchers such as Achten and Jeukendrup found that the rate of fat use peaks at a moderate intensity and falls as you push harder, when carbohydrate takes over.
What is misleading: body fat does not depend on the fuel you use during one session. It depends on your overall energy balance over days and weeks. A harder session uses more energy in total, and your body draws on fat stores at other times of the day. A gentler session uses less energy, but you may manage to do it longer and more often.
So the best zone for weight management is the one you can keep doing week after week without pain or dread. For most people starting out, that is light to moderate effort, simply because it is comfortable, safe for the joints and easy to repeat.
Movement also improves blood pressure, blood sugar, sleep and mood, regardless of whether the scale moves. Those gains are worth having at every heart rate.
Limits and who should be careful
Age formulas describe groups, not individuals. Two people of the same age can have maximum heart rates that differ by 10 to 20 beats per minute, so treat your result as a starting point.
Beta blockers and other heart medicines
Beta blockers are widely used for high blood pressure, heart rhythm problems, angina and after a heart attack. They slow the heart and limit how far it can speed up during exercise. Some other medicines for heart rhythm do the same.
If you take one of these, the zones on this page will be too high, and chasing them could mean pushing too hard. Use the talk test or the 0 to 10 effort scale instead. If you attend cardiac rehabilitation, the team can give you a personal heart rate range based on an exercise test. Never stop or change a heart medicine to exercise harder.
Other situations
- Atrial fibrillation or another irregular rhythm: wrist devices may read your pulse poorly. Effort and breathing are better guides.
- A pacemaker: your heart rate response may be programmed; ask your cardiology team what range applies.
- Heart disease, high blood pressure that is not under control, or diabetes with complications: check with your doctor before starting vigorous exercise.
- Pregnancy: heart rate rises in pregnancy anyway, so effort-based guidance is preferred. Ask your midwife or doctor.
- Heat, illness, poor sleep, caffeine and stress all push heart rate up. On those days, go easier.
Stop exercising and seek urgent help if you have chest pain or pressure, pain spreading to your arm, jaw or back, severe shortness of breath, fainting or near-fainting, or a very fast or irregular heartbeat that does not settle.
What to do next: put your zones to work
Your zones are most useful for keeping a steady, comfortable effort. Here is a simple way to use them over the coming weeks. Talk to your doctor first before you start, especially if you have a heart condition, high blood pressure or diabetes, or take heart medicines.
The first weeks
- Aim for the light range, or for an effort where you can easily chat. Short sessions of 5 to 10 minutes are fine.
- Walking is the easiest option for most people. Our walking guide builds up gradually from a few minutes a day.
- If walking hurts, try the seated Level Start videos in our free workout series. Chair exercise also raises your heart rate, gently.
Building up
- Once light effort feels easy, spend part of each session in the moderate range: talk but not sing.
- Work towards 150 minutes of moderate activity a week, spread over most days. Shorter bouts add up.
- Add strength exercises twice a week. Strong muscles take load off your joints and heart.
A sample week using your zones
This is one way to spread your effort over a week once you can walk for 20 minutes or so. Adjust it to your own body and timetable.
- Two days: a 20 to 30 minute walk, mostly in the light range, with a few minutes of moderate effort in the middle.
- Two days: a Start or Build workout video, aiming for a moderate effort during the active parts.
- One day: something you enjoy for its own sake, such as swimming, dancing at home or cycling, without looking at your watch.
- Rest days: gentle stretching or a short stroll. Recovery is part of training.
Vigorous effort is optional. Some people enjoy short bursts once they are fitter; others never need them. Moderate activity, done regularly, brings most of the health benefit.
Food and support
Movement works best together with regular, filling meals. Our eating plan gives you practical, affordable recipes. If you would like help putting it all together, book a free video meeting (in English), or join the free Obesity Foundation Club to keep track of your progress and get encouragement.
Related calculators
- Calories burned calculator: estimate the energy used by walking, swimming or chair exercise.
- Calorie calculator: your daily energy needs at your activity level.
- Water intake calculator: what to drink when you exercise or it is hot.
Frequently asked questions
What is a good target heart rate for exercise?
For most adults, moderate exercise sits at about 64 to 76% of maximum heart rate. At 50 years old that is roughly 111 to 131 beats per minute with the Tanaka formula. If you are new to exercise, starting in the light range and moving up over weeks is perfectly sensible.
Is there really a fat-burning zone?
During gentle exercise a larger share of the energy comes from fat, but the total energy used is smaller. Over days and weeks, body fat changes with your overall energy balance, not with the fuel mix of one session. Choose the intensity you can enjoy and repeat.
Why is 208 − 0.7 × age used instead of 220 − age?
The Tanaka formula comes from a large analysis of 351 studies with more than 18,000 people and was confirmed in a laboratory study. The older 220 − age rule tends to overestimate maximum heart rate in young adults and to underestimate it in older adults.
Can I use heart rate zones if I take beta blockers?
Not reliably. Beta blockers and some other heart medicines keep your heart rate lower, so the zones from any age formula will be too high. Use the talk test or a 0 to 10 effort scale instead, and ask your doctor or cardiac rehabilitation team for a personal range.
My heart rate goes up fast even on a slow walk. Is that bad?
Not necessarily. When you are starting out, or carrying more body weight, your heart works harder at a slower pace. With regular activity, the same walk usually feels easier and your heart rate at that pace drops. If you have chest pain, dizziness or unusual breathlessness, stop and get medical advice.
Sources
- Tanaka H, Monahan KD, Seals DR – Age-predicted maximal heart rate revisited, Journal of the American College of Cardiology (2001)
- Garber CE et al. – ACSM position stand: quantity and quality of exercise for developing and maintaining cardiorespiratory, musculoskeletal and neuromotor fitness in apparently healthy adults, Medicine & Science in Sports & Exercise (2011)
- Harvard Health Publishing – Target heart rate on a beta blocker
- Application and measurement properties of the talk test in cardiopulmonary patients: a systematic review (2024)
- Achten J, Gleeson M, Jeukendrup AE – Determination of the exercise intensity that elicits maximal fat oxidation, Medicine & Science in Sports & Exercise (2002)
- Jeukendrup A – What is Fatmax? (mysportscience, 2015)