Device research record
Garmin Fenix 6
Signals and sensors
From the device record. Fields the source does not state are left out.
- Maker
- Garmin
- Form factor
- Wrist
- Series
- Fenix 6
- Family
- Garmin smartwatch
- Signals recorded
- PPG, Accelerometer
- Also called
- Fenix 6, Fenix 6 Pro
What published studies show
Results quoted from 3 published validation studies, each against a clinical reference. A result applies to the model and protocol tested, not to every model the brand sells. From the wearable accuracy database (v1.0.0).
HRV (RMSSD)1 study
| Device tested | Result | Reference | Sample | Study |
|---|---|---|---|---|
| Garmin Fenix 6 | 10.52%Mean absolute percentage error | ECG | n = 13, Home, during sleep, 536 nights | Dial et al. (2025)Independent |
| Garmin Fenix 6 | 0.87Lin's concordance correlation | ECG | n = 13, Home, during sleep, 536 nights | Dial et al. (2025)Independent |
- Garmin Fenix 610.52%
Mean absolute percentage error · vs ECG · n = 13, Home, during sleep, 536 nights
Dial et al. (2025) Independent
- Garmin Fenix 60.87
Lin's concordance correlation · vs ECG · n = 13, Home, during sleep, 536 nights
Dial et al. (2025) Independent
Blood oxygen (SpO2)1 study
| Device tested | Result | Reference | Sample | Study |
|---|---|---|---|---|
| Garmin Fenix 6 | 4.29% (CCC 0.10)Mean absolute percentage error | Medical-grade pulse oximeter | n = 22, Normoxic and hypoxic conditions | Carrier et al. (2025)Independent |
- Garmin Fenix 64.29% (CCC 0.10)
Mean absolute percentage error · vs Medical-grade pulse oximeter · n = 22, Normoxic and hypoxic conditions
Carrier et al. (2025) Independent
VO2max estimate1 study
| Device tested | Result | Reference | Sample | Study |
|---|---|---|---|---|
| Garmin Fenix 6 | 7.05% (CCC 0.73)Mean absolute percentage error | Indirect calorimetry | n = 19, Graded exercise test and outdoor run | Carrier et al. (2025)Independent |
- Garmin Fenix 67.05% (CCC 0.73)
Mean absolute percentage error · vs Indirect calorimetry · n = 19, Graded exercise test and outdoor run
Carrier et al. (2025) Independent
Energy expenditure (calories)1 study
| Device tested | Result | Reference | Sample | Study |
|---|---|---|---|---|
| Garmin Fenix 6walking | 32.0% walk / 21.8% runMean absolute percentage error | Indirect calorimetry | n = 20, Outdoor 2-km walk (6 km/h) and run (10 km/h) | Le et al. (2022)Independent |
- Garmin Fenix 632.0% walk / 21.8% run
Mean absolute percentage error, walking · vs Indirect calorimetry · n = 20, Outdoor 2-km walk (6 km/h) and run (10 km/h)
Le et al. (2022) Independent
Comparisons
Head-to-head comparisons for this brand.
- Garmin vs Apple Watch: PPG, ECG & Battery Compared
- Apple Watch Ultra 2 vs Garmin Fenix 8: Specs Guide
- Polar vs Garmin: PPG Sensor Accuracy for Athletes
- Forerunner 965 vs Fenix 8: Battery, Water Rating and ECG
- WHOOP vs Garmin: PPG-Based Recovery and Training Analytics
- Fitbit vs Garmin: Heart Rate Accuracy Compared
- Amazfit vs Garmin: Budget vs Premium PPG Sensor Technology
- COROS vs Garmin: PPG Sensor and Training Platform Compared
- Suunto vs Garmin: PPG Sensor Accuracy for Outdoor Athletes
- Samsung Galaxy Watch vs Garmin: Sensors Compared