How to calculate heart rate maximum?
The Heart Rate Calculator uses the Oakland non-linear formula to estimate your maximum heart rate:
This formula is considered more accurate than the widely-used Haskell & Fox equation (220 − age), which was, according to one of its creators, "never supposed to be an absolute guide to rule people's training." The Oakland formula better accounts for the non-linear decline in maximum heart rate with age. However, because maximum heart rate varies greatly between individuals — even within the same age group — the only truly accurate measurement comes from a physician-supervised maximum heart rate test. If you have that result, you can enter it directly into the "Custom Maximum Heart Rate" field.
Resting heart rate
Your resting heart rate is the number of times your heart beats per minute while you are at rest. To get an accurate reading:
- Do not measure within two hours of exercise or a stressful event.
- Avoid caffeine for at least an hour before measuring (it can elevate your heart rate).
- Do not measure after extended sitting or standing, as these can affect your reading.
- Sit quietly for at least 5 minutes before taking the measurement.
- Take multiple readings and average them for the best accuracy.
How to measure your resting heart rate
- Place your index and middle fingers on your wrist (below the base of your thumb) or on the side of your neck just under your jawbone.
- Count the number of beats you feel in 15 seconds.
- Multiply that number by 4 to get your beats per minute (bpm).
The calculator's built-in "Count My Pulse (15 sec)" mode does this multiplication automatically. For greater accuracy, count for a full 60 seconds. It is also good practice to take a few measurements and average them, as mistakes can be easily made.
What is a good resting heart rate?
The normal healthy range for resting heart rate is 60–100 bpm. However, the lower your resting heart rate, the stronger and more efficient your heart typically is — it can pump the same amount of blood with fewer beats. That said, there is wide natural variation between individuals. The average resting heart rate is approximately 65.6 ± 7.7 bpm.
- < 40 bpm: Very low — consult a doctor unless you are a highly trained endurance athlete.
- 40–49 bpm: Athletic — excellent cardiovascular fitness.
- 50–59 bpm: Excellent — very good heart health.
- 60–69 bpm: Good — healthy cardiovascular function.
- 70–79 bpm: Average — a normal resting heart rate for most adults.
- 80–89 bpm: Below average — regular aerobic exercise may help lower it.
- 90–99 bpm: Poor — consider lifestyle changes and consulting a doctor.
- ≥ 100 bpm: Too high (tachycardia) — consult a doctor.
If your resting heart rate is below 60 bpm but you do not lead an athletic lifestyle, or above 100 bpm without recent exercise or stimulants, consult a healthcare professional. Always repeat measurements before drawing conclusions, as errors can be made.
Resting heart rate chart
The table below provides reference resting heart rate ranges by age group and fitness category:
| Age | Athlete | Excellent | Good | Average | Below Avg | Poor |
|---|---|---|---|---|---|---|
| 18–25 | < 49 | 49–55 | 56–61 | 62–65 | 66–69 | 70–73 |
| 26–35 | < 49 | 49–54 | 55–61 | 62–65 | 66–70 | 71–74 |
| 36–45 | < 50 | 50–56 | 57–62 | 63–66 | 67–70 | 71–75 |
| 46–55 | < 50 | 50–57 | 58–63 | 64–67 | 68–71 | 72–76 |
| 56–65 | < 51 | 51–56 | 57–61 | 62–67 | 68–71 | 72–75 |
| 65+ | < 50 | 50–55 | 56–61 | 62–65 | 66–69 | 70–73 |
Heart rate zones
The calculator uses the Karvonen formula to calculate personalized heart rate training zones based on your heart rate reserve (HRR — the difference between your maximum and resting heart rate):
Heart Rate Reserve (HRR) = Max HR − Resting HR
- Zone 1 — Recovery (50–60%): Very light activity. Ideal for warm-ups, cool-downs, and active recovery days.
- Zone 2 — Endurance (60–70%): Light to moderate effort. The fat-burning zone; ideal for long slow distance training and building aerobic base.
- Zone 3 — Aerobic (70–80%): Moderate effort. Improves cardiovascular fitness and aerobic endurance.
- Zone 4 — Threshold (80–90%): Hard effort. Pushes your lactate threshold; improves speed and race performance.
- Zone 5 — VO₂ Max (90–100%): Maximum effort. Short, intense intervals that maximize aerobic capacity.
FAQs
Is a lower resting heart rate always better?
Generally yes — a lower resting heart rate indicates a more efficient heart. However, a very low resting heart rate (below 40 bpm) can indicate a heart rhythm issue unless you are a highly trained endurance athlete. Always consult a doctor if you are concerned.
How accurate is the Oakland formula?
The Oakland formula (192 − 0.007 × age²) is more accurate than the commonly used 220 − age formula, especially for older adults where the linear formula tends to overestimate maximum heart rate. However, maximum heart rate is highly individual and varies significantly — even within the same age group. The only truly accurate measurement comes from a physician-supervised stress test.
Can I improve my resting heart rate?
Yes. Regular aerobic exercise is the most effective way to lower your resting heart rate over time. Adequate sleep, stress management, limiting caffeine and alcohol, and maintaining a healthy weight also contribute to a healthier resting heart rate.
We try our best to make this calculator as precise and reliable as possible. However, this tool can never replace professional medical advice. Always consult a qualified healthcare professional before making significant changes to your exercise routine or if you have concerns about your heart rate.