Kramer Index Calculator

MENTZER INDEX CALCULATOR- DIFFRENTIATE BETWEEN THALASSEMIA AND IRON DEFICIENCY ANEMIA

The Kramer Index Calculator is a simple and effective tool for estimating the severity of neonatal jaundice by identifying the extent of skin discoloration in newborns.

By selecting the visible jaundice zones, the Kramer Index Calculator provides an approximate total serum bilirubin (TSB) level based on the highest zone involved. This online Kramer Index Calculator is designed for educational and clinical support, helping healthcare professionals and students understand Kramer’s method.

While the Kramer Index Calculator can guide initial assessment, confirmatory laboratory testing is essential before making any treatment decisions.

Kramer’s Zones – TSB Estimator (Highest Zone)

Tap zones where jaundice is visible. Each tap cycles: none → light → deep → none. Select multiple areas; on Calculate we use the highest-numbered selected zone (clinical Kramer method).

Light yellow Deep yellow You can mark more than one zone; only the farthest caudal (highest) counts.

Select one or more areas, then click Calculate Estimated TSB.

Disclaimer: Kramer’s method estimates TSB by the most caudal zone involved and intensity. Confirm with lab TSB; treat per standard neonatal jaundice guidelines.

Reference (Kramer’s rule)

Zone	Light staining	Deep staining
1. Face & neck	5–7 mg/dL	7–9 mg/dL
2. Chest & upper abdomen	7–9 mg/dL	9–11 mg/dL
3. Lower abdomen & thighs	9–11 mg/dL	11–13 mg/dL
4. Legs & forearms	11–13 mg/dL	14–16 mg/dL
5. Palms & soles	13–15 mg/dL	≥ 17 mg/dL