By life stage, expected resting heart rate ranges are: Newborn (birth to 4 weeks) : 100–205 beats per minute (bpm). Infant (4 weeks to 1 year) : 100–180 bpm. Toddler (1 to 3 years) : 98–140 bpm. Preschool (3 to 5 years) : 80–120 bpm. School-age (5 to 12 years) : 75–118 bpm. Adolescent (13 to 17) : 60–100 bpm.