Health & Sports Tools
Heart Rate Zone Calculator
Find endurance, tempo, and VO2 max heart-rate bands.
Slug: heart-rate-zone-calculator
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#heart rate
#training zones
What you get
- Instant calculations with inline validation.
220-minus-age and Karvonen formulas. Explains five standard training zones. Encourages lab tests or wearables for precision.
Estimated max HR
190 bpm
Resting HR
65 bpm
Age
30 yrs
| Training zone | % of reserve | Target bpm |
|---|---|---|
| Zone 1 · Recovery | 50–60% | 128–140 bpm |
| Zone 2 · Endurance | 60–70% | 140–153 bpm |
| Zone 3 · Tempo | 70–80% | 153–165 bpm |
| Zone 4 · Threshold | 80–90% | 165–178 bpm |
| Zone 5 · VO₂ max | 90–100% | 178–190 bpm |
Uses the Karvonen formula (heart rate reserve). Consult a physician before high-intensity training if you have cardiovascular concerns.
A platform that keeps
growing naturally
Every feature starts as a real need. New tools keep appearing not because of trends, but because someone runs into a problem and decides to solve it properly.
