Every high-yield number, cut-off and bedside formula the Pediatrics Prometric asks — with calculators.
| Age | HR (awake) | RR | SBP |
|---|---|---|---|
| Newborn | 100–180 | 40–60 | 60–90 |
| Infant (1–12 mo) | 100–160 | 30–50 | 70–100 |
| Toddler (1–3 y) | 90–150 | 24–40 | 80–110 |
| Preschool (3–5 y) | 80–140 | 22–34 | 90–110 |
| School (6–12 y) | 70–120 | 18–30 | 90–120 |
| Adolescent | 60–100 | 12–20 | 100–130 |
Median expected SBP ≈ 90 + (2 × age). Tachycardia is the earliest sign of shock; hypotension is late (decompensated).
| Age | Fast breathing |
|---|---|
| <2 months | ≥60/min |
| 2–11 months | ≥50/min |
| 1–5 years | ≥40/min |
| Age | Estimated weight (kg) |
|---|---|
| 0–12 months | (0.5 × age in months) + 4 |
| 1–5 years | (2 × age in years) + 8 |
| 6–12 years | (3 × age in years) + 7 |
Anchors: term birth weight ≈ 3.5 kg; ~10 kg at 1 year; ~20 kg at 5 years; ~30–35 kg at 9–10 years.
Use a length-based tape (Broselow) when available; it is more accurate than age formulas, which underestimate weight in obese children.