Heart Rate Zones Calculator
Estimated maximum heart rate and the 60, 70, 80 and 90 percent training thresholds.
Results
Estimated maximum heart rate
184
bpm
Estimated maximum heart rate
185
bpm
Minimum
110
bpm
Value
128
bpm
Second value
147
bpm
Maximum
165
bpm
What this tool does
Both formulas shown are age-based estimates with a spread of ten beats per minute or more between individuals, so a measured maximum from a supervised test is always better. If you have a heart condition or are starting to exercise after a long break, talk to a doctor before training by heart rate.
Formula
HRmax ≈ 208 − 0.7 × age (Tanaka) · classic: 220 − age
Variables
| Symbol | Meaning | Unit |
|---|---|---|
a | Age | — |
HT | Estimated maximum heart rate | bpm |
HC | Estimated maximum heart rate | bpm |
Z2 | Minimum | bpm |
Z3 | Value | bpm |
Z4 | Second value | bpm |
Z5 | Maximum | bpm |
Worked example
- Age35
- Estimated maximum heart rate184 bpm
- Estimated maximum heart rate185 bpm
- Minimum110 bpm
- Value128 bpm
- Second value147 bpm
- Maximum165 bpm
Limitations
- This tool is informational only. It does not diagnose, treat or replace a qualified health professional. Speak to a doctor before making decisions about your health.
- The result is an estimate based only on the values you type. Real situations often include factors this calculator does not know about.