Target Heart Rate Calculator
Zones built on YOUR resting heart rate beat generic charts. Enter both numbers for personalized bands.
Zone 3 target (aerobic)
151 bpm
- Max HR (220−age)
- 188 bpm
| Zone | Intensity | Heart rate |
|---|---|---|
| Z1 | 50% | 127 bpm |
| Z2 | 60% | 139 bpm |
| Z3 | 70% | 151 bpm |
| Z4 | 80% | 163 bpm |
| Z5 | 85% | 170 bpm |
How the Target Heart Rate Calculator works
The calculation follows the standard method used across the US — no shortcuts, no hidden assumptions. Here is exactly what happens behind the scenes:
Formula
THR = (HRmax − HRrest) × intensity + HRrest
Frequently Asked Questions
How does the Target Heart Rate Calculator work?
Enter your numbers above and results update instantly using standard formulas, computed entirely on your device.
Is the Target Heart Rate Calculator free to use?
Yes — completely free with no signup required, and it works on phones, tablets, and desktops.
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