❤️ Maximum Heart Rate Calculator
By ToolNimba Health Team · Reviewed by ToolNimba Editorial Review, fitness and exercise content · Updated 2026-06-19
This calculator gives an age-based estimate only and is not medical advice. Your true maximum heart rate can differ by 10 to 12 bpm or more, and no formula replaces a supervised exercise test. If you have a heart condition, take medication that affects heart rate (such as beta blockers), are pregnant, or are starting a new exercise programme, speak to a doctor before training to a target heart rate.
Enter your age in whole years to estimate your maximum heart rate.
These are population estimates only. Your true maximum can vary by about 10 to 12 bpm in either direction.
Your maximum heart rate (MHR) is the highest number of beats per minute your heart can reach during all-out effort. It is the anchor for setting cardio training zones, because most zones are defined as a percentage of it. Measuring it directly needs a maximal stress test, so most people estimate it from age. Enter your age and this calculator shows two of the most trusted estimates side by side: the classic 220 minus age and the more modern Tanaka formula.
What is the Max Heart Rate Calculator?
Maximum heart rate is largely set by your age and your genetics, not by your fitness level. A fitter person has a stronger heart that pumps more blood per beat and a lower resting pulse, but their peak rate is roughly the same as an unfit person of the same age. This is why MHR is used as a fixed personal ceiling: training zones such as fat burn, aerobic and threshold are all expressed as a percentage of it.
The best known estimate is the formula 220 minus age, often credited to Haskell and Fox from the early 1970s. It is simple and easy to remember, which is why it appears on treadmills and in gym charts everywhere. Its weakness is accuracy: it was never derived from a rigorous study designed to predict MHR, and it tends to overestimate the maximum in younger people and underestimate it in older adults.
The Tanaka formula, 208 minus 0.7 times age, came out of a 2001 meta-analysis of many studies and is generally more accurate across the adult age range, especially for people over about 40. The two formulas agree at age 40 (both give 180 bpm) and diverge from there: below 40 the classic formula reads higher, and above 40 it reads lower. Whichever you use, remember that an individual's real maximum routinely sits 10 to 12 bpm away from the predicted value, so treat the number as a starting point and adjust to how you actually feel.
When to use it
- Setting the top of your cardio training zones before planning interval or endurance workouts.
- Configuring a fitness watch or chest strap that asks for your maximum heart rate.
- Understanding what a "180 bpm" reading during hard exercise means relative to your estimated ceiling.
- Comparing the classic and Tanaka estimates to choose a more realistic number for your age.
How to use the Max Heart Rate Calculator
- Enter your age in whole years.
- Read the classic estimate from the 220 minus age formula.
- Read the Tanaka estimate from the 208 - 0.7 x age formula next to it.
- Use the figure that best fits your age (Tanaka is often better past 40) as the ceiling for your training zones.
Formula & method
Worked examples
A 25-year-old wants both maximum heart rate estimates.
- Classic: 220 - 25 = 195 bpm
- Tanaka: 208 - (0.7 x 25) = 208 - 17.5 = 190.5
- Rounded, Tanaka = 191 bpm
Result: Classic 195 bpm, Tanaka 191 bpm
A 55-year-old compares the two formulas.
- Classic: 220 - 55 = 165 bpm
- Tanaka: 208 - (0.7 x 55) = 208 - 38.5 = 169.5
- Rounded, Tanaka = 170 bpm
Result: Classic 165 bpm, Tanaka 170 bpm (Tanaka reads higher past age 40)
Estimated maximum heart rate by age (rounded bpm)
| Age | Classic (220 - age) | Tanaka (208 - 0.7 x age) |
|---|---|---|
| 20 | 200 | 194 |
| 30 | 190 | 187 |
| 40 | 180 | 180 |
| 50 | 170 | 173 |
| 60 | 160 | 166 |
| 70 | 150 | 159 |
Common mistakes to avoid
- Treating the estimate as an exact limit. Both formulas predict an average for your age. Real maximums spread about 10 to 12 bpm either side, so do not panic if your watch reads a few beats above the number, or assume you are unfit if you cannot reach it.
- Thinking fitness raises your maximum heart rate. Getting fitter lowers your resting heart rate and raises how hard you can work, but it does not raise your peak rate. MHR is mostly fixed by age and genetics, and it gradually declines as you get older.
- Ignoring medication and conditions. Beta blockers and some other heart medicines cap your heart rate well below any age-based estimate. If you take them, the formulas do not apply, and you should set zones with a clinician.
- Using the classic formula at every age. The 220 minus age rule overestimates for the young and underestimates for older adults. Past about 40, the Tanaka formula usually gives a more realistic ceiling.
Glossary
- Maximum heart rate (MHR)
- The highest number of heartbeats per minute you can reach during maximal effort, used as the ceiling for training zones.
- bpm
- Beats per minute, the unit for heart rate.
- Resting heart rate
- Your pulse at complete rest, a separate measure that reflects fitness rather than your maximum.
- Tanaka formula
- MHR = 208 - 0.7 x age, an estimate from a 2001 meta-analysis that is often more accurate than 220 minus age.
- Training zone
- A band of heart rate, expressed as a percentage of MHR, that targets a specific training effect such as endurance or threshold.
Frequently asked questions
How do I calculate my maximum heart rate?
The simplest estimate is 220 minus your age. A more accurate option for most adults is the Tanaka formula, 208 minus 0.7 times your age. This calculator shows both at once when you enter your age. For a precise figure you would need a supervised maximal exercise test.
Which formula is more accurate, 220 minus age or Tanaka?
The Tanaka formula (208 - 0.7 x age) is generally more accurate across the adult range and especially past about 40, because the classic 220 minus age rule tends to underestimate the maximum in older people. Below 40 the classic formula reads higher.
Is the 220 minus age formula reliable?
It is a handy rule of thumb but not precise. It was never derived from a study designed to predict maximum heart rate, and individual values commonly fall 10 to 12 bpm away from the prediction. Use it as a rough guide, not an exact limit.
Does fitness change my maximum heart rate?
No. Training lowers your resting heart rate and lets you sustain harder effort, but your peak heart rate is set mostly by age and genetics. It cannot be trained upward and slowly declines with age.
Why do the two estimates differ for my age?
The formulas agree at 180 bpm when you are 40. Below 40 the classic 220 minus age gives a higher number, and above 40 the Tanaka formula gives a higher number, because each captures the age-related decline at a different rate.
Is it safe to exercise at my maximum heart rate?
Brief peaks near your estimated maximum happen during all-out intervals, but most training is done well below it. If you have a heart condition, take medication that affects heart rate, or are new to intense exercise, check with a doctor before training near your maximum.
Sources
- Age-predicted maximal heart rate revisited (Tanaka, Monahan, Seals) , Journal of the American College of Cardiology (2001)
- Target Heart Rates Chart , American Heart Association