Yes, an oxygen level of 98% is good. It falls squarely in the normal range of 95% to 100% for healthy adults and means your blood is carrying oxygen efficiently to your organs and tissues. There’s nothing to worry about with a reading of 98%.
What the Normal Range Looks Like
Oxygen saturation, the number you see on a pulse oximeter, reflects the percentage of red blood cells currently carrying oxygen. For most people, 95% to 100% is considered normal. A reading of 98% puts you near the top of that range.
Readings below 95% suggest your body may not be getting enough oxygen. Below 90% is the threshold most clinicians use to define hypoxemia, a state of genuinely low blood oxygen that typically requires treatment. Between 90% and 94% is a gray zone where symptoms can start appearing, including headaches, restlessness, a faster heart rate, and shortness of breath. At 98%, you’re well above any of these concern thresholds.
When 98% Might Not Apply to You
For people with chronic obstructive pulmonary disease (COPD), the picture is different. European and British clinical guidelines recommend a target oxygen saturation of 88% to 92% for hospitalized COPD patients. A large study published in the Emergency Medicine Journal found that COPD patients with oxygen levels above 92% while receiving supplemental oxygen actually had higher mortality rates. Those in the 97% to 100% range had roughly three times the risk of death compared to those kept at 88% to 92%.
This doesn’t mean 98% is dangerous for a healthy person. It means that for people with COPD, too much supplemental oxygen can suppress the body’s breathing drive and cause carbon dioxide to build up. If you have COPD and your oxygen reads 98% while you’re on supplemental oxygen, that’s worth discussing with your care team.
Oxygen Levels at High Altitude
If you’re checking your oxygen at elevation, expect lower numbers. At around 10,000 feet (3,050 meters), a healthy person’s oxygen saturation can drop to 88% to 91% simply because the air contains less oxygen. That’s a normal physiological response, not a sign of illness. So if you’re hiking in the mountains and your reading dips into the low 90s, altitude is the likely explanation. At sea level, though, 98% is exactly what you’d hope to see.
How Accurate Is Your Pulse Oximeter?
Pulse oximeters work by shining light through your skin to estimate how much oxygen your red blood cells are carrying. That means anything interfering with light transmission can skew the reading. Nail polish, artificial nails, cold fingers, and poor circulation can all cause inaccurate results. Most consumer-grade devices have a margin of error of about 2%, so a reading of 98% could realistically be anywhere from 96% to 100%, all of which are normal.
Skin pigmentation is a more serious accuracy concern. Research from Harvard Medical School has confirmed that darker skin tones can cause pulse oximeters to overestimate oxygen levels. This means a device might display 98% when the true value is lower. People with darker skin who are experiencing symptoms like shortness of breath or confusion should pay attention to how they feel, not just the number on the screen. This issue, called hidden hypoxemia, occurs at higher rates among patients from racial and ethnic minority groups and is associated with worse outcomes.
What About Babies and Children?
Oxygen targets for newborns are slightly different than for adults, particularly for premature infants. Babies born before 32 weeks are typically kept at 90% to 94% when on supplemental oxygen, and above 90% on room air. For older newborns (32 weeks and beyond), the target widens to 92% to 98%. Healthy children and teens follow the same 95% to 100% range as adults. A reading of 98% is normal for a child of any age outside the neonatal intensive care setting.
What Numbers Should Concern You
Oxygen saturation is one of the simplest vital signs to track at home, and 98% is a reassuring number. Here’s a quick reference for context:
- 95% to 100%: Normal for healthy individuals at sea level.
- 91% to 94%: Below normal. You may notice mild symptoms like a faster pulse or slight breathlessness.
- Below 90%: Clinically low. Symptoms can include confusion, rapid breathing, anxiety, and in severe cases, bluish skin around the lips or fingertips.
If your oxygen consistently reads below 95% at rest and at sea level, or if you’re experiencing symptoms of low oxygen even with a normal reading, that’s worth investigating. A single reading of 98% on its own tells you your oxygen is right where it should be.