Calculate pulse rate in bpm from beats counted over a set time, or find your maximum heart rate and target heart rate zone from your age.
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Pulse Rate Formula
The calculator has pulse-count, R–R interval, and adult exercise-target modes. Exercise targets offer two explicitly selected methods; each entered percentage is divided by 100 before use.
Measure pulse
Target zone, percent of max heart rate
Target zone, heart-rate reserve (Karvonen)
- BPM: pulse rate in beats per minute
- beats: number of beats you counted
- seconds: time you spent counting
- MaxHR: estimated maximum heart rate
- age: age in years
- RestingHR: resting pulse in bpm
- intensity (%): the selected percentage of estimated maximum or of heart-rate reserve; these percentage scales are different
Pulse-count mode scales the entered count and duration to bpm. A one-beat difference changes the result by 60/counting seconds bpm; the displayed ± value is arithmetic sensitivity, not a confidence interval or a bound on timing or rhythm error. R–R mode converts an entered beat interval or measured average interval to the corresponding rate; one interval is not a long-term average. Exercise-target mode uses the selected method and requires resting pulse only for HRR. Its adult age input range is 18–120 years, a software limit rather than a validated prescription range. It does not automatically switch methods or classify resting pulse, and it is not a pediatric or personalized exercise prescription.
Typical Pulse Rate Values
The first table contains selected, non-exhaustive MedlinePlus resting-pulse references; newborns and some child age groups are omitted. Rest for at least 10 minutes before measuring a resting pulse. The second table uses the AHA general-guide bands of 50–70% and 70–85% of estimated maximum heart rate, not HRR, with rounded bpm values. These tables do not classify an individual or establish safe personal exercise limits.
| Age group | Resting pulse (bpm) |
|---|---|
| Infant 1–11 months | 80–160 |
| Toddler 1–2 years | 80–130 |
| Child 3–4 years | 80–120 |
| Child 7–9 years | 70–110 |
| Age 10 years and older | 60–100 |
| Trained adult athlete | 40–60 |
| Age | Est. max HR | Moderate (50–70% of Max HR) | Vigorous (70–85% of Max HR) |
|---|---|---|---|
| 20 | 200 | 100–140 | 140–170 |
| 30 | 190 | 95–133 | 133–162 |
| 40 | 180 | 90–126 | 126–153 |
| 50 | 170 | 85–119 | 119–145 |
| 60 | 160 | 80–112 | 112–136 |
| 70 | 150 | 75–105 | 105–128 |
Example Problems
Example 1: counting beats. You count 28 beats in 30 seconds. BPM = 28 / 30 × 60 = 56 bpm. A one-beat difference over that duration equals 2 bpm: 27–29 beats gives 54–58 bpm with the timing held fixed. This is not a confidence interval, and the result alone does not establish whether the pulse is normal for that person.
Example 2: target zone with Karvonen. Age 40, resting pulse 65 bpm, and a chosen 50–85% HRR band. Estimated Max HR = 220 − 40 = 180 bpm. HRR = 180 − 65 = 115 bpm. Lower target = 65 + 115 × 0.50 = 122.5 bpm. Upper target = 65 + 115 × 0.85 = 162.75 bpm. This gives about 123–163 bpm for those entered HRR percentages; it is not the AHA 50–85% of maximum band, which would be 90–153 bpm.
FAQ
Where should I take my pulse? At the wrist, place your index and middle fingers below the base of the opposite thumb and press gently. If using the neck, sit or lie down, use gentle pressure, and never press both sides at once.
How long should I count? MedlinePlus recommends a full-minute count or a 30-second count multiplied by 2. A one-beat difference equals 1 bpm over 60 seconds, 2 bpm over 30 seconds, 4 bpm over 15 seconds, and 6 bpm over 10 seconds. Longer counting reduces this counting-step effect; it does not remove timing error or variation in rhythm.
Is 220 minus age accurate? It is a population estimate, not a measured personal maximum or a hard safety limit. Individual values vary, and medicines or heart conditions can change the appropriate target. The AHA advises asking a health professional about personal targets when these apply.
Why is my resting pulse lower than the standard range? Endurance training, certain medications such as beta blockers, and natural variation can all lower resting pulse. If you have not trained heavily and you feel dizzy or short of breath, talk to a clinician.
