Calories Burned Heart Rate
Estimate calories from heart rate. Keytel formula, HR zones, Live Session mode, VO2 estimate. 80–90% accuracy. ACSM, Keytel et al. 2005.
Preset Scenarios
Live Session — Enter HR every 5 min
$ Calories: 344 calCal/min: 11.5 | Zone 3 | 70% max HR
Max HR: 185 bpm | VO2 est: ~25 mL/kg/min
Screenshot summary: Total calories, cal/min, zone, % max HR, VO2 estimate. Share your burn on social.
For educational and informational purposes only. Verify with a qualified professional.
Answer Capsule: Male: Cal/min = (-55.0969 + 0.6309×HR + 0.1988×Wkg + 0.2017×Age) / 4.184. Female: (-20.4022 + 0.4472×HR - 0.1263×Wkg + 0.074×Age) / 4.184. HR-based estimation is 80–90% accurate vs indirect calorimetry. Optimal range 90–150 bpm.
📋 Key Takeaways
- • Male: Cal/min = (-55.0969 + 0.6309×HR + 0.1988×weight_kg + 0.2017×age) / 4.184
- • Female: Cal/min = (-20.4022 + 0.4472×HR - 0.1263×weight_kg + 0.074×age) / 4.184
- • Source: Keytel et al. 2005 (BJSM), ACSM. 4.184 kJ/cal conversion.
💡 Did You Know?
📖 How It Works
🎯 Expert Tips
Stay in 90–150 bpm
Best accuracy range for HR-based estimation.
Use Live Session
Track real-time HR for more accurate session totals.
Zone awareness
Zone 2 = fat burn; Zone 4–5 = high intensity.
±10% variance
Individual variation exists. Use as guideline.
📊 Comparison Table
| HR (bpm) | Zone | Cal/min (155 lb M, 35yo) |
|---|---|---|
| 100 | 1 | ~5.2 |
| 130 | 2 | ~8.1 |
| 155 | 3 | ~10.2 |
| 170 | 4 | ~11.5 |
| 185 | 5 | ~12.8 |
📈 Infographic Stats
📚 Official Sources
⚠️ Disclaimer: HR-based estimates have ±10% variance. Accuracy drops outside 90–150 bpm. Not a substitute for medical or lab testing.