What is the normal respiratory rate for an adult?

The normal respiratory rate for an adult is between 12 and 20 breaths per minute. This range is established based on physiological studies of human respiration, reflecting the optimal rate at which the body exchanges oxygen and carbon dioxide while maintaining proper metabolic function. Maintaining this respiratory rate is essential for ensuring adequate ventilation and gas exchange in the lungs.

Rates that fall below 12 breaths per minute may indicate bradypnea, which can signal underlying health issues such as respiratory depression. Conversely, rates exceeding 20 breaths per minute could suggest tachypnea and may arise from various conditions, including anxiety, fever, or respiratory distress. Therefore, the established norm of 12-20 breaths per minute provides a valuable benchmark for assessing respiratory function in adults.