Max Heart Rate Calculator & Training Zone Calculator
Your maximum heart rate (MHR) is the highest number of beats per minute your heart can reach during short, all-out effort. Use this free max heart rate calculator to estimate your MHR with 3 proven formulas (Fox 220−age, Tanaka, Nes), then discover your personal heart rate training zones (Z1 recovery to Z5 sprint). MHR varies by age and individual profile (±10 bpm or more between two people of the same age).
1. MHR mini calculator
The 3 most common calculation formulas.
Fox & Haskell
-- bpm
Tanaka
-- bpm
Nes
-- bpm
Average MHR (3 formulas)
-- bpm
Indicative range: -- to -- bpm (±10 bpm)
2. What is MHR?
We speak of MHR to designate the maximum value of beats per minute your heart can reach during maximal effort. It's individual data: it decreases on average with age but remains very variable – two people of the same age can differ by 10 to 15 bpm (or more). MHR doesn't measure your performance level but serves as a reference to calibrate your training zones.
3. Main estimation formulas
These formulas give an order of magnitude. They don't replace a laboratory test or supervised field measurement.
Fox & Haskell Formula (1970)
Equation: MHR = 220 - age
This is the most well-known and simplest formula. Developed in the 1970s, it has been widely distributed but lacks a solid scientific foundation. Recent studies show it often overestimates MHR, particularly in older individuals and trained athletes. Furthermore, the original samples were predominantly male, making this formula even less reliable for women. Its main advantage remains its simplicity of calculation.
Tanaka Formula (2001)
Equation: MHR = 208 - (0.7 × age)
Published in 2001 in the Journal of the American College of Cardiology, this formula is based on a meta-analysis of 351 studies including 18,712 participants. It is considered more accurate than the "220 - age" formula, especially for sedentary and active adults. It generally gives slightly lower values than the classic formula.
Nes Formula (2013)
Equation: MHR = 211 - (0.64 × age)
Developed in 2013 by Nes et al., this formula is based on a Norwegian study of 3,320 healthy individuals aged 19 to 89 years. It uses a lower age slope (0.64 instead of 0.7 or 1), making it particularly suitable for active and athletic individuals. It is now one of the most used formulas in research and sports training.
| Formula | Equation | Comment |
|---|---|---|
| Fox & Haskell ("220 − age") | MHR ≈ 220 − age | The most known, very simple but approximate. |
| Tanaka 2001 | MHR ≈ 208 − 0.7 × age | More accurate for adults than 220 − age. |
| Nes 2013 | MHR ≈ 211 − 0.64 × age | Based on over 3,000 individuals, widely used today. |
Evolution of your MHR with age
4. Heart rate zones
Once MHR is estimated, you can define your working zones. Here's the breakdown inspired by AHA / Mayo Clinic recommendations (50% to 90% of MHR). Values adjust automatically after calculation.
| Zone | % MHR | Beats / min (MHR unknown) |
Type of effort |
|---|---|---|---|
| Z1 | 50–60 % | -- | Recovery / active walking |
| Z2 | 60–70 % | -- | Easy run / endurance |
| Z3 | 70–80 % | -- | Tempo pace / threshold |
| Z4 | 80–90 % | -- | Sustained intervals |
| Z5 | 90–100 % | -- | Sprints / very short efforts |
Estimated MHR by age (3 formulas)
| Age | Fox (220−age) | Tanaka (208−0.7×age) | Nes (211−0.64×age) |
|---|---|---|---|
| 20 yrs | 200 bpm | 194 bpm | 198 bpm |
| 25 yrs | 195 bpm | 190 bpm | 195 bpm |
| 30 yrs | 190 bpm | 187 bpm | 192 bpm |
| 35 yrs | 185 bpm | 184 bpm | 189 bpm |
| 40 yrs | 180 bpm | 180 bpm | 185 bpm |
| 45 yrs | 175 bpm | 177 bpm | 182 bpm |
| 50 yrs | 170 bpm | 173 bpm | 179 bpm |
| 55 yrs | 165 bpm | 170 bpm | 176 bpm |
| 60 yrs | 160 bpm | 166 bpm | 173 bpm |
| 65 yrs | 155 bpm | 163 bpm | 169 bpm |
| 70 yrs | 150 bpm | 159 bpm | 166 bpm |
Margin of error: ±10-15 bpm depending on the individual. Tanaka and Nes are more accurate than Fox for adults.
Heart rate zones (example: MHR = 185 bpm, age 35)
| Zone | % MHR | BPM | Effort type | Usage |
|---|---|---|---|---|
| Z1 | 50 – 60 % | 93 – 111 | Recovery / active walking | Recovery between sessions |
| Z2 | 60 – 70 % | 111 – 130 | Easy run / endurance | 70-80% of volume |
| Z3 | 70 – 80 % | 130 – 148 | Tempo pace / threshold | Steady-state runs |
| Z4 | 80 – 90 % | 148 – 167 | Sustained intervals | VO₂max development |
| Z5 | 90 – 100 % | 167 – 185 | Sprints / very short efforts | Max power |
Frequently Asked Questions
What is the best formula to calculate maximum heart rate?
The Tanaka formula (208 − 0.7 × age) is generally considered more accurate than the classic "220 − age". The Nes formula (211 − 0.64 × age) is also widely used, especially for athletes. All provide an estimate with a margin of error of ±10-15 bpm. Use our calculator above to compare all three instantly.
Is the "220 minus age" formula reliable?
The 220 − age formula (Fox & Haskell, 1970) is the best known but the least accurate. It often overestimates MHR in older individuals and trained athletes. Moreover, it was developed using predominantly male samples, making it even less reliable for women. The Tanaka (2001) and Nes (2013) formulas, based on larger, more recent and gender-balanced samples, are preferable for setting your training paces.
How are heart rate zones Z1 to Z5 defined?
The 5 zones are percentages of MHR: Z1 (50-60%) recovery, Z2 (60-70%) base endurance, Z3 (70-80%) tempo/threshold, Z4 (80-90%) sustained intervals, Z5 (90-100%) sprint. This breakdown is inspired by AHA / Mayo Clinic recommendations. Combine them with your VO₂max for precision training.
My measured MHR differs from the calculated value — is that normal?
Yes, perfectly normal. Two people of the same age can have a 10 to 20 bpm difference. The formulas give a statistical average. If you know your actual MHR (from a stress test or field test), enter it in the "known Max HR" field above to get personalised training zones.
How to use heart rate zones for running training?
Z1-Z2 = easy endurance (70-80% of training volume). Z3 = tempo/threshold. Z4-Z5 = intervals and VO₂max. Combine HR zones with training paces and monitor your anaerobic threshold for optimal progress.
Does temperature affect my heart rate during running?
Yes, significantly. In hot weather (>25°C), your heart rate can be 10-15 bpm higher at the same pace. This means your perceived zones shift. Use the temperature impact calculator to adjust your targets, and track calorie expenditure which also increases with heat.
5. Limitations & individual profile
- These are average estimates. Two people of the same age can have a 20 bpm difference without being abnormal.
- Cardiac medications (beta-blockers, etc.), certain pathologies or stress strongly modify MHR: ask your doctor for advice.
- MHR doesn't indicate your level: you can be very performant with a "low" MHR and vice versa.
6. Field test (reserved for experienced runners)
A more accurate estimate can be obtained in a field test, only if you're in good health and ideally with your doctor's agreement:
- Warm-up: 15 to 20 minutes of progressive jogging.
- Slight uphill section: perform 2 to 3 repetitions of 2 to 3 minutes very intense (almost max), 2 to 3 minutes recovery between each.
- Monitor your heart rate. The peak reached during the 2nd or 3rd repetition is often close to your MHR.
- Cool down: 10 minutes of easy jogging + dynamic stretching.
Reminder: this protocol is reserved for people in good health, already used to intense efforts. If in doubt, get accompanied by a coach or health professional.
To go further
Once your MHR is determined, you can:
- Calculate your optimal training paces by combining HR and speed
- Estimate your VO₂max to track your aerobic progression
- Understand the anaerobic zone to better manage your effort zones
- Plan your sessions with the speed and pace calculator
- Predict your times on different race distances
- Adjust your effort for heat or cold conditions
- Estimate your calorie burn per session
- Check the impact of carbon-plate shoes on your performance