Are you working hard enough on your morning walk, or pushing too hard at the gym? Our free target heart rate calculator answers that in seconds. Enter your age, and if you know it your resting heart rate, and the target heart rate calculator estimates your maximum heart rate, your five heart rate zones in beats per minute (bpm), and the ranges for moderate and vigorous exercise. It works on your phone and takes less than a minute.
Below the tool you will find everything you need to use those numbers well: how maximum heart rate is estimated, how the Karvonen formula works, a heart rate chart by age, what each zone feels like, the truth about the "fat-burning zone", and how to train safely in Pakistan's heat.
How to use this target heart rate calculator
- Enter your age (15 to 90 years). Age is the main input, because estimated maximum heart rate falls as you get older.
- Add your resting heart rate (optional), between 35 and 120 bpm. Measure it in the morning before you get out of bed (see the pulse guide below). If you add it, the calculator switches to the Karvonen (heart rate reserve) method, which is more personal.
- Choose a formula. "220 − age" is the default and the one most charts use. You can switch to the Tanaka formula, "208 − 0.7 × age", which is often more accurate for people over 40.
- Read your results. You will see your estimated max heart rate, your resting heart rate (if given), a table of the five training zones in bpm, and your moderate and vigorous intensity ranges.
- Use the count helper. The tool shows how many beats you should feel in 15 seconds for moderate exercise, so you can check your pulse mid-workout without a watch.
What is maximum heart rate?
Your maximum heart rate is the highest number of times your heart can beat in one minute during all-out effort. You cannot train above it, and you should not try to reach it often. Every heart rate zone is a percentage of this number, so getting a sensible estimate is the first step for any target heart rate calculator.
The only way to measure your true max heart rate is a supervised exercise stress test, usually on a treadmill in a hospital or sports lab. Most people never do one, so a target heart rate calculator uses formulas based on age instead.
Formula 1: 220 − age
This is the classic, easy-to-remember formula. A 30-year-old gets an estimated max heart rate of 190 bpm (220 − 30), and a 50-year-old gets 170 bpm. It is the formula behind most gym posters and the American Heart Association's target heart rates chart, which is why it is the default in our target heart rate calculator.
Its weakness is that it was never based on strong research. It tends to overestimate max heart rate in younger people and underestimate it in older adults.
Formula 2: Tanaka (208 − 0.7 × age)
In 2001, Tanaka and colleagues analysed data from thousands of healthy adults and proposed 208 − 0.7 × age. For a 30-year-old this gives 187 bpm, very close to the classic formula. At 40, both formulas give exactly 180 bpm. The gap opens up as you age: at 60, Tanaka gives 166 bpm versus 160 bpm, and at 70 it gives 159 bpm versus 150 bpm.
If you are over 40 and fairly fit, choosing the Tanaka option in the target heart rate calculator may feel more realistic, because the classic formula can make your zones feel too easy.
Limitations of both formulas
Both formulas, and therefore every target heart rate calculator, describe the average person, not you. Real maximum heart rates for people of the same age can differ by about 10 to 12 bpm either way. That means two 35-year-olds could have true max values of 173 and 197 bpm. Genetics, fitness, altitude, heat, dehydration, stress and caffeine all play a part.
Some medicines also change the picture. Beta-blockers, which are commonly prescribed for blood pressure and heart conditions, lower your heart rate, so age-based zones will be too high for you. If you take any regular medicine, ask your doctor what heart rate range is safe, and use the talk test as your main guide.
The Karvonen formula and heart rate reserve
The simple method takes a percentage of your max heart rate. The Karvonen formula is smarter, because it also uses your resting heart rate. The gap between your resting and maximum heart rate is called your heart rate reserve: the extra beats your heart can add when you exercise.
The formula is:
Target heart rate = (max HR − resting HR) × intensity % + resting HR
Because a fitter person usually has a lower resting heart rate, Karvonen gives them a target that matches their fitness better. When you enter a resting heart rate, our target heart rate calculator uses this method automatically.
Worked example: a 40-year-old with a resting heart rate of 70
Let's run the target heart rate calculator maths by hand for Ali, aged 40, whose resting pulse is 70 bpm, using the default 220 − age formula.
- Max heart rate = 220 − 40 = 180 bpm.
- Heart rate reserve = 180 − 70 = 110 beats.
- At 50%: 110 × 0.50 + 70 = 125 bpm.
- At 70%: 110 × 0.70 + 70 = 147 bpm.
- At 85%: 110 × 0.85 + 70 = 163.5, so about 164 bpm.
Compare this with the simple percentage method for the same person: 50% of 180 is 90 bpm, 70% is 126 bpm and 85% is 153 bpm. The Karvonen numbers are higher at the bottom end, because your heart is already beating 70 times a minute before you start. For many people, a 90 bpm "workout" barely feels like moving, which is why Karvonen often feels more accurate.
| Intensity | Simple method (% of max) | Karvonen method (HRR) |
|---|---|---|
| 50% | 90 bpm | 125 bpm |
| 60% | 108 bpm | 136 bpm |
| 70% | 126 bpm | 147 bpm |
| 80% | 144 bpm | 158 bpm |
| 90% | 162 bpm | 169 bpm |
Example: age 40, resting heart rate 70 bpm, max heart rate 180 bpm (220 − age). Enter your own numbers in the target heart rate calculator to get your personal version of this table.
Heart rate chart by age (target heart rate calculator table)
If you just want a quick reference, this heart rate chart by age uses the 220 − age formula and the American Heart Association's intensity bands: moderate intensity is 50–70% of max heart rate, and vigorous intensity is 70–85%. Numbers are rounded to the nearest beat. For personal numbers that include your resting heart rate, use the target heart rate calculator above.
| Age | Max heart rate (220 − age) | Moderate zone (50–70%) | Vigorous zone (70–85%) |
|---|---|---|---|
| 20 | 200 bpm | 100–140 bpm | 140–170 bpm |
| 25 | 195 bpm | 98–137 bpm | 137–166 bpm |
| 30 | 190 bpm | 95–133 bpm | 133–162 bpm |
| 35 | 185 bpm | 93–130 bpm | 130–157 bpm |
| 40 | 180 bpm | 90–126 bpm | 126–153 bpm |
| 45 | 175 bpm | 88–123 bpm | 123–149 bpm |
| 50 | 170 bpm | 85–119 bpm | 119–145 bpm |
| 55 | 165 bpm | 83–116 bpm | 116–140 bpm |
| 60 | 160 bpm | 80–112 bpm | 112–136 bpm |
| 65 | 155 bpm | 78–109 bpm | 109–132 bpm |
| 70 | 150 bpm | 75–105 bpm | 105–128 bpm |
Remember that these are estimates. If you are 50 and your heart rate sits at 125 on a brisk walk but you can still chat easily, you are probably fine. Your body's signals matter more than a chart.
The 5 heart rate zones in our target heart rate calculator
Coaches split exercise intensity into five heart rate zones. Each zone trains your body in a slightly different way. Our target heart rate calculator shows all five in bpm, based on your age (and resting heart rate if you gave it).
| Zone | % of max HR | What it feels like | Main benefits |
|---|---|---|---|
| Zone 1: Very light | 50–60% | Easy stroll; you can talk or even sing | Warm-up, cool-down, recovery days, getting started |
| Zone 2: Light (fat-burning and base) | 60–70% | Comfortable; breathing a little faster but full sentences are easy | Builds aerobic base and endurance; uses a higher share of fat for fuel |
| Zone 3: Moderate (aerobic) | 70–80% | Breathing deeper; you can talk in short sentences | Improves heart and lung fitness and stamina |
| Zone 4: Hard (threshold) | 80–90% | Hard; only a few words at a time; muscles start to burn | Raises the pace you can hold; improves speed and performance |
| Zone 5: Maximum | 90–100% | All-out; you cannot talk; can last only seconds to a minute or two | Short sprints for trained, healthy athletes only |
Note how the zones line up with the AHA bands. Zones 1 and 2 (50–70%) are moderate intensity. Zone 3 and the lower half of zone 4 (70–85%) are vigorous intensity. Above 85% is very hard work that most people do not need for good health.
What is zone 2 training?
Zone 2 training has become popular with runners, cyclists and fitness podcasts. The idea is simple: spend most of your weekly cardio at an easy, steady pace (about 60–70% of max) where you could keep going for a long time. Many endurance athletes do around 80% of their training this way and save hard efforts for a couple of sessions a week.
For most adults, a brisk 30 to 45 minute walk where you feel warm and slightly out of breath, but can still talk, is a perfect zone 2 workout. It is gentle on the joints and easy to recover from, and you can do it almost every day.
The "fat-burning zone": myth or fact?
Many treadmills, and some target heart rate calculator apps, show a "fat burn" zone around 60–70% of max heart rate. There is some truth behind it, but the label is misleading.
At lower intensity, your body does use a higher percentage of fat for fuel. As you work harder, it shifts towards carbohydrates. But harder exercise burns more total calories per minute. In 30 minutes, a fast jog often burns more fat in total than a slow walk, even though a smaller share of the energy comes from fat.
More importantly, fat loss over weeks and months depends mainly on your overall energy balance: the calories you eat versus the calories you use across the whole day. No single zone melts belly fat. The best "fat-burning" exercise is the one you will actually do regularly, combined with sensible eating. If weight is your goal, our calorie and protein calculator can help you set a realistic daily target.
So the cardio zone you choose should depend on your fitness, enjoyment and time. Easy zone 2 sessions are great for building a base and are safe for beginners. Shorter, harder sessions save time once you are fitter.
Moderate vs vigorous intensity: how much exercise do you need?
The World Health Organization and the American Heart Association recommend that adults do at least:
- 150 minutes of moderate-intensity aerobic activity per week (for example, 30 minutes on 5 days), or
- 75 minutes of vigorous-intensity activity per week, or an equal mix of the two, plus
- muscle-strengthening activities on at least 2 days a week, working all the major muscle groups.
The UK's NHS physical activity guidelines give the same targets and add that you should break up long periods of sitting. Doing more than the minimum brings extra benefits, but any movement is better than none.
Moderate activity includes brisk walking, gentle cycling, doubles badminton or heavy cleaning. Vigorous activity includes running, fast cycling, swimming laps, football or singles badminton. The target heart rate calculator tells you which group your workout falls into. Curious how your activity, sleep and diet stack up? Try our wellness habits assessment.
The talk test: a simple alternative to heart rate
You don't need a watch to judge intensity. The CDC's talk test is easy:
- Moderate intensity: you can talk, but not sing.
- Vigorous intensity: you can only say a few words before pausing for breath.
The talk test is especially useful if you take medicines that affect heart rate, if your formula-based zones don't match how you feel, or if you simply find counting beats a hassle. It works just as well on a treadmill as on a walk around the park with a friend.
How to check your pulse
You can find your heart rate with two fingers and a clock. Never use your thumb, because it has its own pulse.
At the wrist (radial pulse)
- Turn one hand palm up.
- Place the tips of your index and middle fingers on the inside of your wrist, just below the base of your thumb.
- Press lightly until you feel the beat.
At the neck (carotid pulse)
- Place two fingers gently at the side of your neck, in the soft groove beside your windpipe.
- Press softly and check one side only. Pressing hard or on both sides can make you feel dizzy.
Counting your beats
Count the beats for 15 seconds and multiply by 4. For example, 30 beats in 15 seconds equals 120 bpm. During exercise, a 10-second count multiplied by 6 is quicker, because your heart rate starts dropping as soon as you stop. Our target heart rate calculator shows the 15-second count for your moderate zone, so you know what number to look for.
Are smartwatches and fitness bands accurate?
Most wearables measure heart rate with green lights on the back of the device. At rest and during steady walking or cycling they are usually fairly close. They are less reliable during weightlifting, sprints, boxing or anything with lots of wrist movement, and if the band is loose, sweaty, or on very hairy or tattooed skin. A chest-strap monitor is more accurate for training.
Watches also show a "max heart rate", but by default this is usually the same age-based estimate. Treat any device reading as a helpful guide, not a medical measurement. If a watch alerts you to a very high, very low or irregular rhythm at rest, see a doctor.
Resting heart rate: what is normal?
Your resting heart rate is how many times your heart beats per minute when you are calm and still. For adults, a normal resting heart rate is 60 to 100 bpm. Well-trained athletes and very active people often sit lower, sometimes in the 40s or 50s, because their heart pumps more blood with each beat.
- Below 60 bpm: can be normal for fit people. If you also feel dizzy, faint, very tired or short of breath, see a doctor.
- 60–100 bpm: the typical adult range.
- Above 100 bpm at rest: worth checking with a doctor, especially if it happens often. Fever, dehydration, anxiety, caffeine, thyroid problems and some medicines can raise it.
Measure your resting heart rate first thing in the morning, before chai and before getting out of bed, on three or four days and take the average. Over months of regular cardio, many people see it drop by a few beats, which is a nice sign of improving fitness. Re-enter the new value in the target heart rate calculator every few months, because your Karvonen zones will shift. You can also log your pulse alongside your blood pressure in our blood pressure checker.
Exercising safely in Pakistan
Pakistan has a strong walking culture. Early morning walks in parks like Lahore's Race Course and Jilani Park, Karachi's Bagh Ibn-e-Qasim, or Islamabad's F-9 Park are a great, free way to hit the zone 2 target from your target heart rate calculator results. Walking with family or friends also makes the talk test natural.
Training in the heat
Summer heat changes your heart rate. In hot, humid weather your heart beats faster to move blood to your skin for cooling, so the same walk can push you 10 to 20 bpm higher than in winter. Dehydration raises it even more. In summer:
- Train early morning or after sunset, and avoid the midday sun, especially during heatwaves.
- Hydrate before, during and after exercise. Plain water is best; add an ORS sachet if you sweat heavily for a long time.
- Slow down rather than chase a number. If your heart rate is higher than usual in the heat, ease off and use the talk test instead of the numbers from the target heart rate calculator.
- Wear light, loose clothing and a cap, and stop if you feel dizzy, confused or stop sweating, which can signal heat exhaustion or heatstroke.
During Ramadan, many people shift workouts to just before iftar (light) or after taraweeh (moderate), when they can drink water afterwards.
Gym culture
Gyms are booming in Pakistani cities, and many young men focus mainly on weights. Strength training is excellent, but your heart needs regular cardio too. Use the target heart rate calculator to find your zone 2 range, then try adding 20 to 30 minutes of it on a treadmill, bike or cross-trainer after weights, two or three times a week. For more on building a balanced gym routine, read our guide to shilajit, gym training and natural energy. Some people include pure Himalayan shilajit as part of their daily wellness routine, but no supplement replaces training, food and sleep, and you should check with your doctor first if you take any medication.
Recovery matters as much as training. Your heart rate stays higher the next day if you sleep badly. Our sleep calculator can help you plan bedtimes that leave you rested for morning workouts.
Cautions: who should get medical advice first
A target heart rate calculator gives general guidance for healthy adults. Speak to a doctor before starting a new exercise plan, or before using these zones, if you:
- have a heart condition, high blood pressure, diabetes, or have had a heart attack or stroke;
- take beta-blockers or other medicines that affect heart rate (your safe range may be much lower than any target heart rate calculator suggests);
- are pregnant;
- are new to exercise, are over 40 and have been inactive for a long time, or have risk factors such as smoking or a family history of early heart disease.
Heart disease often starts earlier in South Asians, so it is worth knowing your other numbers too. Our heart health score looks at eight key factors, including activity, sleep, cholesterol and blood pressure.
Warning signs: stop exercising and get help
Stop immediately and seek medical help if you experience any of the following during or after exercise:
- chest pain, pressure or tightness, or pain spreading to the arm, jaw, neck or back;
- severe breathlessness that doesn't settle with rest;
- dizziness, light-headedness or fainting;
- palpitations, a racing or irregular heartbeat that does not slow down.
If symptoms are severe or don't go away within a few minutes of rest, call 1122 (Rescue 1122) or 115 in Pakistan, or your local emergency number abroad. Don't drive yourself to hospital.
Want to explore more? Visit our free health calculators hub for BMI, blood pressure, diabetes risk, sleep and more.
Disclaimer
This target heart rate calculator and article are for general education only. Heart rate formulas are estimates and may not fit your body. This is not a diagnosis or a personal exercise prescription. Please consult a qualified doctor before starting a new exercise programme, especially if you have a medical condition, are pregnant or take regular medication.
