A healthy resting adult takes 12 to 20 breaths per minute. That number shifts significantly with age, dropping from as high as 60 breaths per minute in newborns to the low teens in adolescents, then climbing slightly again in older adults. Your breathing rate is one of four core vital signs, and it responds to everything from sleep and exercise to anxiety and illness.
Normal Breathing Rates by Age
Children breathe faster than adults because their lungs are smaller and their metabolisms run hotter. Here’s what’s considered normal at rest:
- Infants (under 1 year): 30 to 60 breaths per minute
- Toddlers (1 to 3 years): 24 to 40 breaths per minute
- Preschoolers (4 to 5 years): 22 to 34 breaths per minute
- School-age children (6 to 12 years): 18 to 30 breaths per minute
- Adolescents (13 to 17 years): 12 to 16 breaths per minute
- Adults: 12 to 20 breaths per minute
Older adults tend to breathe slightly faster at baseline. A study of long-stay patients aged 67 to 101 found a normal range of 16 to 25 breaths per minute, higher than the standard adult range. In that same study, every patient admitted with a lower respiratory tract infection was breathing faster than 26 times per minute, with an average around 30. For elderly individuals, a rate above 28 is generally considered abnormally fast.
How Your Body Controls Breathing Rate
You don’t have to think about breathing because specialized centers in your brainstem generate a baseline rhythm automatically. What fine-tunes that rhythm, moment to moment, is carbon dioxide. Sensors on the surface of the brainstem detect shifts in the acidity of the fluid surrounding your brain. When carbon dioxide rises, that fluid becomes more acidic, and the sensors trigger deeper, faster breathing to flush the excess CO2 out. When CO2 drops, breathing slows.
Carbon dioxide is the primary driver of breathing under normal conditions. Oxygen levels play a secondary role, monitored by sensors in the carotid arteries (near the jaw) and the aorta. These peripheral sensors mainly kick in when oxygen drops unusually low, such as at high altitude or during severe lung disease. High CO2 and increased acidity amplify the sensitivity of these oxygen sensors, so the two systems reinforce each other when something goes wrong.
Breathing During Exercise and Sleep
During intense exercise, breathing rate roughly doubles. Research on adults at peak exertion found an average maximum of about 36 breaths per minute, with no significant difference between men and women. The range varied widely, from the upper 20s to the mid-40s, depending on fitness level and effort.
Sleep pushes breathing in the opposite direction. Your overall ventilation drops in every sleep stage compared to wakefulness, and the pattern becomes more rapid but shallower. During REM sleep (the stage associated with dreaming), the volume of each breath falls to roughly 73% of what it is while you’re awake. This is normal. The slight irregularity in breathing rhythm during REM sleep is also expected and not a sign of trouble on its own.
When Breathing Is Too Fast
A resting rate consistently above 20 breaths per minute in adults is called tachypnea. It doesn’t always signal a medical emergency. Exercise, anxiety, pain, and fever all raise your breathing rate temporarily. But a persistently elevated rate at rest can point to infection, lung disease, heart problems, blood clots in the lungs, or a condition called metabolic acidosis, where your blood becomes too acidic and your body compensates by breathing faster to blow off CO2.
One specific pattern worth knowing: Kussmaul breathing is unusually deep and rapid breathing that occurs when the body is trying to correct severe acidosis. It’s most commonly associated with diabetic ketoacidosis, a dangerous complication of uncontrolled diabetes.
Hyperventilation, where both rate and depth increase beyond what the body needs, is frequently triggered by anxiety or panic attacks. It lowers CO2 levels too far, which can cause tingling in your fingers, lightheadedness, and chest tightness. These symptoms feel alarming but typically resolve once breathing slows.
When Breathing Is Too Slow
Fewer than 12 breaths per minute at rest in an adult is called bradypnea. The most common causes are sedatives, opioid medications, alcohol intoxication, an underactive thyroid, and traumatic brain injury. Opioids are particularly notable because they directly suppress the brainstem’s drive to breathe, which is why opioid overdose can be fatal.
Hypoventilation, where breathing is too shallow or too slow to meet the body’s oxygen needs, can also result from conditions that weaken the muscles involved in breathing. Diseases affecting the nerves or muscles of the diaphragm and chest wall, including ALS, Guillain-Barré syndrome, and muscular dystrophy, can gradually reduce a person’s ability to ventilate effectively. Sleep apnea, both the obstructive and central types, represents another form of reduced ventilation, with repeated pauses in breathing during sleep.
How to Count Your Breathing Rate
Sit in a chair or upright in bed and relax for a few minutes before measuring. Count the number of times your chest or abdomen rises over the course of a full 60 seconds. Each rise counts as one breath. Counting for only 15 seconds and multiplying by four is less accurate because breathing rhythm naturally varies from one breath to the next.
If you’re checking someone else’s rate, try to observe without telling them. People unconsciously change their breathing when they know it’s being watched. A common clinical trick is to keep your fingers on their wrist as if you’re still checking their pulse while you silently count chest movements.
A single reading outside the normal range isn’t necessarily meaningful. Stress, caffeine, recent activity, and even a full stomach can temporarily shift your rate. A pattern of consistently abnormal readings at rest, especially combined with other symptoms like chest tightness, dizziness, or fatigue, is what matters.