Oxygen Level Checker
Enter the required values below to run the educational estimation.
Pulse Oximeter Technology and Limitations
Pulse oximeters use light beams to estimate oxygen saturation. While helpful, many factors can interfere with their accuracy, including poor peripheral circulation (cold hands), movement, dark nail polish, artificial nails, skin pigmentation, or carbon monoxide exposure (which registers falsely high).
When to Seek Urgent Medical Attention
Never rely solely on a home device reading to decide if you need medical care. If you are struggling to breathe, have blue lips or face, have severe chest pressure, or feel confused, seek emergency services immediately, regardless of what the screen displays.
When to Seek Urgent Medical Attention
- Any reading below 90% (severe hypoxemia requiring immediate evaluation).
- Difficulty breathing, wheezing, gasping, or rapid breathing.
- Chest pain, pressure, confusion, blue skin, lips, or fingernails.
Frequently Asked Questions
SpO2 stands for peripheral capillary oxygen saturation. It estimates the percentage of oxygen-carrying hemoglobin in your blood relative to the total hemoglobin.
For most healthy individuals, a normal resting SpO2 level ranges between 95% and 100%. Readings consistently below 95% warrant medical evaluation.
