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Maximum Heart Rate Calculator

Calculate your maximum heart rate using the Tanaka and Fox formulas based on your age

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๐Ÿ‡ฉ๐Ÿ‡ฐ All calculations are based on Danish rules, rates, and currency (DKK). This calculator is translated for convenience but applies exclusively to Denmark.

Calculate your maximum heart rate

Your maximum heart rate is the highest number of heartbeats per minute your heart can achieve during maximum physical exertion. Knowing your max heart rate is essential for planning effective training and avoiding overexertion.

Tanaka formula

The Tanaka formula (208 โˆ’ 0.7 ร— age) is the most accurate of the age-based formulas. It was developed in 2001 based on a meta-analysis of 351 studies with over 18,000 participants. For a 30-year-old, the formula gives a max heart rate of about 187 bpm. The formula is more accurate than the older Fox formula, especially for older adults.

Fox formula

The Fox formula (220 โˆ’ age) is the most well-known and widely used formula for calculating max heart rate. It is easy to remember but can overestimate max heart rate in younger people and underestimate it in older adults. For a 30-year-old it gives 190 bpm. Despite its limitations, it is still widely used in the fitness industry.

What affects your max heart rate?

Your actual max heart rate can vary by up to 10-15 beats from the calculated value. Genetics, fitness level, medication and daily condition all play a role. The most accurate way to find your max heart rate is a maximal exertion test under controlled conditions. Max heart rate naturally decreases with age regardless of fitness level.

How to use your max heart rate

Once you know your max heart rate, you can calculate your optimal heart rate training zones. Zone 1 (50-60% of max) is light exercise, zone 2 (60-70%) is fat burning, zone 3 (70-80%) is aerobic training, zone 4 (80-90%) is anaerobic training, and zone 5 (90-100%) is maximum effort. Most recreational exercisers should train primarily in zones 2-3.

Frequently Asked Questions

Which max heart rate formula is most accurate?

The Tanaka formula (208 โˆ’ 0.7 ร— age) is considered the most accurate of the age-based formulas. It is based on a large meta-analysis and is more accurate than the Fox formula (220 โˆ’ age), especially for people over 40. However, your actual max heart rate can vary by 10-15 beats regardless of formula.

Can I exceed my calculated max heart rate?

Yes, it is possible. The calculated formulas only provide an estimate. Your actual max heart rate can be 10-15 beats above or below the calculated value. If you regularly measure a heart rate above the calculated max, that is likely your real max heart rate. A professional test provides the most accurate result.

Does max heart rate decrease with age?

Yes, max heart rate naturally decreases by about 0.7 beats per year according to the Tanaka formula. A 20-year-old has an estimated max heart rate of about 194, while a 60-year-old has about 166. This decline occurs regardless of fitness level and is due to natural age-related changes in the heart.

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