Background Cerebral and cardiac blood flow are important to the pathophysiology and development of cerebro‐ and cardiovascular diseases. The purpose of this study was to investigate the age dependence of normal cerebral and cardiac hemodynamics in children and adults over a broad range of ages. Methods and Results Overall, 52 children (aged 0.6–17.2 years) and 30 adults (aged 19.2–60.7 years) without cerebro‐ and cardiovascular diseases were included in this study.