Healthy adult at rest, sea level.
Enter your SpO2 reading above to see what band it falls in and what to do.
Within the healthy adult range.
Call emergency services (911) immediately.
Pulse oximetry can be inaccurate, but at this reading the safer assumption is that something is wrong. Do not drive yourself.
Each band is shown at equal visual width for clarity — actual numeric ranges are noted on each cell.
For educational reference only. This tool helps you interpret a pulse oximeter reading you have already taken — it does not measure SpO2 and is not a substitute for clinical assessment. Pulse oximetry can be inaccurate in low perfusion, with nail polish, in carbon monoxide poisoning, or in dark skin tones (FDA 2024 guidance). If your reading is below 90%, you have new shortness of breath, chest pain, blue lips/fingertips, confusion, or you feel unwell at any reading, seek medical care.
Pulse oximeter chart by BestRatedDocs · Reviewed by Dr. David Taylor, MD, PhD