What Is a Normal Blood Oxygen Level?
SpO2 estimates how much oxygen your blood is carrying. Wearables are useful for trends, not one-off panic readings.
Typical ranges
- Most healthy adults at rest: 95%–100%
- Persistent readings under ~92% usually need prompt medical review
- Altitude can lower baselines
Wearable caveats
Fit, cold hands, and motion artifacts can distort wrist readings. Prefer repeated resting measurements.
Frequently Asked Questions
Is 94% SpO2 dangerous?
Recheck while resting; if repeatedly low or you feel unwell, contact a clinician.
Disclaimer: This article is for informational purposes only and does not constitute medical advice. Consult a healthcare professional for medical concerns.