Is 22 breaths a minute normal?

The question

Mrs Smith's sats, pulse and blood pressure look fine, but she's breathing 22 a minute: is that a problem, or can it wait?

Understand

Mrs Smith's sats, pulse and blood pressure look fine, but she's breathing 22 times a minute, up from 16. Is that a problem? A normal adult at rest breathes about 12 to 20 times a minute, and above 20 can be an early sign of getting sicker. Sensors in the brain and the neck (chemoreceptors) watch the blood: when oxygen runs low, or an illness like sepsis builds up acid, they make you breathe faster. A pulse oximeter shows the result, not how hard someone is working to breathe. So breathing rate is often an early warning, and it changes by a bigger share than pulse or blood pressure. Yet it is the vital sign least often written down. Count it for a full minute without the person noticing, because knowing you are being watched changes how you breathe, and report a raised rate even when the rest looks fine. Charts and rules vary: follow your local policy. Mrs Smith and her numbers are fictional examples, and the drawings are simplified teaching schematics.

1. Low oxygen, or acid building up (as in sepsis), makes sensors in the brain and neck speed up breathing.
2. So breathing rate often changes early, and by a bigger share than pulse or blood pressure.
3. Sats show the result, not how hard the person is working to breathe. Yet breathing is the vital sign least often recorded.

Key takeaways

• Adult at rest: usually 12–20 breaths a minute.
• Count a full minute, without the person noticing.
• Above 20 can be an early sign of getting sicker: report it, as your local chart and policy say.
• Good sats don't rule out a problem: count the breathing too.

In practice

• Count a full minute, without the person noticing: knowing changes how you breathe.
• Compare with the last set: a rise matters, even inside the range.
• Report a raised rate even when the other obs look fine. Charts and rules vary: follow your local policy.

Check yourself

Mr Brown's sats, pulse and BP are in range. You count his breathing for 15 seconds after telling him: 5 breaths. What do you do?

Words to know

Respiratory rate

breaths a minute; a normal adult at rest is usually 12–20 (respir- (breathe) + -atory (to do with))

Chemoreceptor

a sensor that detects chemicals in the blood, such as oxygen, carbon dioxide or acid (chemo- (chemical) + receptor (receiver))

Sats (SpO₂)

oxygen saturation: how much of the blood's haemoglobin is carrying oxygen

Transcript

Sources

1. Cretikos MA et al. Respiratory rate: the neglected vital sign. Med J Aust 2008;188(11):657-659. Ventilation is driven mainly by CO2 with oxygen contributing; hypoxaemia, hypercarbia and metabolic acidosis (e.g. sepsis) raise the rate; relative changes in rate are much greater than in heart rate or systolic BP in unstable patients; over half of serious adverse events had RR > 24 and could be flagged up to 24 h earlier; > 20 'probably unwell', > 24 'likely critically ill'; RR is the vital sign least often recorded (read 10 October 2026)
2. Healthify He Puna Waiora (NZ) - Breathing rate: adults at rest usually 12-20 breaths per minute; count for one full minute; your rate can change if you know it is being counted; a faster rate may be an early sign the body is under stress (read 10 October 2026)
3. StatPearls - Physiology, Respiratory Drive (Brinkman JE, Toro F, Sharma S; updated 5 Jun 2023): peripheral chemoreceptors in the carotid bodies (neck) and aortic bodies mainly sense low arterial oxygen, and also CO2 and hydrogen ions; central chemoreceptors in the medulla sense pH changes; the respiratory centre changes the rate and depth of breathing; low oxygen raises the rate more than the depth; CO2 that builds up makes the blood more acidic, and breathing more removes it (read 11 October 2026)

Checked against these sources at the time of publishing. Sources change, so check the date above and your local policy. Spotted an error? Tell us and we'll correct it.