What is the normal respiration rate range (breaths per minute)?

• A. 12-20 breaths/min
• B. 8-12 breaths/min
• C. 20-30 breaths/min
• D. 10-15 breaths/min

Answer: (A)

Normal respiration rate at rest for a healthy adult is 12 to 20 breaths per minute. This range reflects steady, quiet breathing when the body isn’t exerting itself and gas exchange is balanced. Rates within this window indicate normal oxygen intake and carbon dioxide removal. If breathing speeds up above this range, it’s a sign of tachypnea and can occur with fever, illness, anxiety, or increased work of breathing. Breathing consistently slower than this range can point to bradypnea, possibly from medication effects or central nervous system changes. While some individuals may sit toward the lower end under certain conditions, the widely used reference for a resting adult remains 12–20 breaths per minute.