Max Heart Rate Calculator by Age

Your maximum heart rate is the highest your heart will go at all-out effort, and the only input any age formula needs is your age. The American Heart Association uses 220 − age, so a 30-year-old lands near 190 bpm. The research-grade alternative, Tanaka’s 208 − 0.7 × age, gives 187 bpm. Enter your age:

Two formulas, and where they disagree

Switch the calculator between them and you will see the gap open with age, not close:

Age	220 − age	Tanaka (208 − 0.7 × age)
20	200 bpm	194 bpm
30	190 bpm	187 bpm
40	180 bpm	180 bpm
50	170 bpm	173 bpm
60	160 bpm	166 bpm
70	150 bpm	159 bpm

The two lines cross at 40. Below that, the classic formula reads a little high; above it, a little low. That is exactly the flaw Tanaka’s team set out to fix: pooling 351 studies and 18,712 people, they found the classic equation underestimates maximum heart rate in older adults, which quietly makes prescribed training too easy for anyone past middle age.

Does gender change the answer?

No, and this is one of the rare places in exercise physiology where the evidence is blunt about it. Tanaka reported that the age regression “was not different between men and women, nor was it influenced by wide variations in habitual physical activity levels.” A calculator that asks for your sex before predicting maximum heart rate is asking for something the data says it does not need. Fitness does not move the ceiling either — it moves how long you can live near it, and it lowers your resting heart rate.

What the number is actually for

Nobody trains at maximum. The number exists so percentages of it can become bpm ranges. The AHA frames those percentages in two bands:

• Moderate intensity — about 50 to 70% of maximum. At 40 years old (180 bpm), 90 to 126 bpm.
• Vigorous intensity — about 70 to 85% of maximum. Same person, 126 to 153 bpm.

Its published target zone therefore runs 50 to 85% and stops there. The finer five-zone split most watches and coaches use slices the same span differently and adds a fifth band above 90% that sits above the AHA’s charted target. The heart rate zone calculator builds all five from your age, and the Karvonen version personalizes them with your resting pulse.

How wrong this number can be

Individual maximums scatter about 10 to 12 bpm on either side of any age prediction, which at 40 means a genuine range of roughly 168 to 192 bpm hiding behind the tidy “180”. Two things follow. First, beating your predicted maximum in a hard interval is unremarkable, not a warning. Second, zones built on a prediction inherit its error — a reason to sanity-check them against how the effort actually feels rather than obeying the watch.

The estimate fails outright for some people. Beta-blockers and several antiarrhythmics lower both resting and maximum rate on purpose; pacemakers set their own ceiling; arrhythmias make the whole concept unstable. In those cases the useful number comes from a supervised stress test, not from arithmetic. The AHA says the same thing more plainly: if you have a heart condition or take medication, ask your clinician what your heart rate should be.

This content is informational and does not replace medical evaluation. If you want to see the formula turned into a training plan, start with the weight loss heart rate calculator or the maximum heart rate by age chart.