Maximum Heart Rate Calculator

Calculate your maximum heart rate (HRmax) using Tanaka (208 − 0.7 × age) for men and Gulati (206 − 0.88 × age) for women, with Gellish (207 − 0.7 × age), Nes (211 − 0.64 × age) and the Fox (220 − age) reference shown side-by-side.

Maximum Heart Rate Formulas

Tanaka (2001) — our default for men: HRmax = 208 − 0.7 × age. Meta-analysis of 18,712 participants.
Gulati (2010) — our default for women: HRmax = 206 − 0.88 × age. Developed on 5,437 women.
Gellish (2007): HRmax = 207 − 0.7 × age. Developed on regularly active adults.
Nes / HUNT (2013): HRmax = 211 − 0.64 × age. Norwegian HUNT Fitness Study on 3,320 healthy adults.
Fox (1971) — historical reference: HRmax = 220 − age. Simple and widely quoted, but a 1970s approximation with ±10–12 bpm variability that overestimates for active adults.

No formula is universally “correct.” The only way to know your true HRmax is a supervised maximum-effort test.

How the Five Formulas Diverge by Age

Every popular HRmax formula gives a different number for the same person. The spread is small at age 20 and grows to 15 bpm by age 60 — enough to shift a Zone 2 ceiling into tempo territory. This is why picking the right formula matters most for masters athletes and older adults.

Age	Fox (220−age)	Tanaka	Gellish	Nes (HUNT)	Gulati (♀)	Max spread
20	200	194	193	198	188	12 bpm
30	190	187	186	192	180	12 bpm
40	180	180	179	185	171	14 bpm
50	170	173	172	179	162	17 bpm
60	160	166	165	173	153	20 bpm
70	150	159	158	166	144	22 bpm

The HUNT Study: Why 220 − Age Overestimates for Fit Adults

The Fox formula (220 − age) was never derived from a controlled study — it was a 1970s approximation. In 2013, Nes and colleagues at NTNU published the HUNT Fitness Study, measuring peak heart rate in 3,320 healthy adults aged 19–89 during a maximal treadmill test. Their result: HRmax = 211 − 0.64 × age, with a residual standard deviation of ±10.8 bpm. Body composition, sex, physical activity level and VO₂max explained less than 1% of additional variance.

Practical consequence: Fox overestimates HRmax for well-trained adults in their 30s–50s and underestimates it for older, less-active people. Nes and Tanaka correct this drift and are better defaults for anyone over 40.

Reference: Nes BM, Janszky I, Wisløff U, Støylen A, Karlsen T. Age-predicted maximal heart rate in healthy subjects: The HUNT Fitness Study. Scand J Med Sci Sports. 2013;23(6):697–704.

How to Measure Your Actual HRmax in the Field

A formula gives you a starting point. A well-designed field test comes close to a supervised graded exercise test for healthy adults.

Warm up thoroughly — 15 minutes of easy jogging, then 3 × 30-second strides at 5k pace with full recovery.
Find a hill or flat road with 3–5 minutes of continuous, unobstructed effort available.
Run hard but sustainably for 2 minutes, gradually accelerating so heart rate climbs steadily.
Sprint the last 30–60 seconds all-out. The final surge is where you approach true HRmax.
Record the peak value your monitor shows in the 10 seconds after you stop. Chest straps are far more accurate than optical wrist sensors near HRmax.

Repeat on a fresh day and take the higher of the two values. If your measured number differs from the formula estimate by more than 15 bpm, use the measured number for training zones. Do not attempt a maximal field test if you have a heart condition, are over 40 and sedentary, take medication that alters heart rate, or have not been cleared for vigorous exercise.

Six Factors That Shift Your Real HRmax Away From the Formula

Beta-blockers and rate-limiting medication can lower HRmax by 20–30 bpm. Age-based formulas do not apply.
Genetics account for roughly half of individual variation in HRmax; some healthy adults sit 10–15 bpm above or below their predicted value from birth.
Training modality: HRmax is typically 5–8 bpm lower on the bike than running, and lower again in swimming.
Heat, altitude, and dehydration depress peak HR; 2% dehydration alone drops HRmax by 3–5 bpm.
Overtraining suppresses maximal HR — a documented marker of overreaching.
Stimulants such as caffeine raise submaximal HR by 3–5 bpm but do not meaningfully change true HRmax.

Heart Rate Zones (reference: age 30, HRmax ≈ 187 bpm, Tanaka)

Zone	Name	% HRmax	BPM (age 30)	Primary use
1	Recovery	50–60%	94–112	Warm-up, recovery, active rest
2	Endurance	60–70%	112–131	Aerobic base, fat oxidation
3	Aerobic	70–80%	131–150	Tempo, aerobic capacity
4	Threshold	80–90%	150–168	Lactate threshold intervals
5	Maximum	90–100%	168–187	VO₂ max, neuromuscular power

Frequently Asked Questions

How accurate are heart rate calculators?

Formula-based calculators typically estimate HRmax within ±10–15 bpm. They are accurate enough to structure training for recreational athletes but not a substitute for a supervised max test.

What is the Karvonen method?

Karvonen uses heart rate reserve (HRR = HRmax − HRrest). Target HR = HRrest + (Intensity% × HRR). It personalises zones by accounting for resting heart rate.

Should I use different zones for cycling vs running?

Your bpm targets stay the same, but heart rate response differs by sport. Cycling HR is typically 5–10 bpm lower than running at equivalent perceived effort due to the seated position.

Is Zone 2 the best zone for fat loss?

Zone 2 maximises the percentage of calories from fat, but higher intensities burn more total calories per minute. Long-term fat loss is driven by total weekly energy balance.

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