Compare maximum-heart-rate estimates or an entered measurement and inspect percentage-of-maximum versus heart-rate-reserve arithmetic.
01 / PURPOSE-SPECIFIC INPUTS
Estimates are not measurements or individualized exercise prescriptions. Medications and medical conditions can affect HR response; arithmetic bins do not establish fat-burning thresholds.
02 / RESULT & INTERACTIVE INSPECTION
Adult general information only. Age-based maximum HR has substantial individual uncertainty. Heart-rate-affecting medicines, cardiovascular conditions and other health factors can change appropriate monitoring and exercise intensity; seek individualized guidance. No diagnosis or exercise intensity is prescribed.
Selected range: 138–164 bpm at 60–80% HR reserve plus resting HR. Comparison 1: 220 − age · population estimate, 190 bpm.
| Intensity bin | Lower bpm | Upper bpm |
|---|---|---|
| 50–60% | 125 | 138 |
| 60–70% | 138 | 151 |
| 70–80% | 151 | 164 |
| 80–90% | 164 | 177 |
| 90–100% | 177 | 190 |
| Method / evidence | Maximum bpm |
|---|---|
| 220 − age · population estimate | 190 |
| 208 − 0.7 × age · population estimate | 187 |
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The age formulas 220−age and 208−0.7×age describe population estimates, while measured mode uses an independently entered maximum. They are displayed separately, not averaged or treated as interchangeable personal measurements.
Compare maximum-heart-rate estimates or an entered measurement and inspect percentage-of-maximum versus heart-rate-reserve arithmetic. Inspect real calculated values through accessible visual controls and review the worked assumptions.
Target Heart Rate Calculator calculates locally in browser memory. Financial values, schedules, measurements, health inputs and other entries are not sent to a third-party calculation-processing API or stored as a personal profile. Ordinary page requests may still be logged. Clipboard access occurs only when you choose Copy Result.
The age formulas 220−age and 208−0.7×age describe population estimates, while measured mode uses an independently entered maximum. They are displayed separately, not averaged or treated as interchangeable personal measurements.
HR reserve equals selected maximum minus resting HR. Target HR equals resting HR plus the chosen fraction of that reserve. At maximum 190, resting 60 and 60% HRR, the result is 60+0.60×130 = 138 bpm.
No. Percentage-of-maximum multiplies maximum directly; HRR adds resting HR after multiplying the reserve. The selected basis is labeled beside the target range and zone table.
No. The 50–60 through 90–100 percent bins are arithmetic ranges under the selected basis, not individually validated metabolic thresholds or a guaranteed physiological training effect.
Age predictions have individual uncertainty. Heart-rate-affecting medicines and cardiovascular or other medical conditions can alter appropriate monitoring and intensity. The tool does not diagnose a condition or prescribe individualized exercise.
Mayo Clinic’s exercise-intensity explanation describes 208−0.7×age, HRR arithmetic, individual variation and medication effects. CDC explains relative intensity and the talk test. The traditional 220−age method is a separately labeled approximation.