Drugs & toxicology

Lead unit converter

Blood lead level (toxic exposure)

Also known as: Pb, Blood lead, BLL, Blood lead level, Blutblei, Plomb

Converter

Enter a value in any unit and all other units fill in.

µmol/L µg/dL µg/L nmol/L ng/dL

Worked example

1.75 µg/dL (middle of the reference range) = 0.0845 µmol/L

Conversion formulas

µmol/L	µmol/L = µg/dL × 0.04826	µg/dL = µmol/L × 20.72
µg/L	µg/L = µg/dL × 10	µg/dL = µg/L × 0.1
nmol/L	nmol/L = µg/dL × 48.26	µg/dL = nmol/L × 0.02072
ng/dL	ng/dL = µg/dL × 1000	µg/dL = ng/dL × 0.001

Reference range

Unit	Adults
µmol/L	0 – 0.1689
µg/dL	0 – 3.5
µg/L	0 – 35
nmol/L	0 – 168.9
ng/dL	0 – 3500

Source: AIHA: CDC lowers blood lead reference value to 3.5 µg/dL (MMWR 2021) · Last reviewed: 2026-10-14

Note from the source: CDC blood lead reference value 3.5 µg/dL (97.5th percentile of US children, 2021); a screening threshold, not a safe level. The earlier value was 5 µg/dL

Frequently asked questions

How do I convert Lead from µg/dL to µmol/L?

µmol/L = µg/dL × 0.04826. In the other direction: µg/dL = µmol/L × 20.72.

What is the reference range of Lead?

For adults the range is 0 – 3.5 µg/dL (AIHA: CDC lowers blood lead reference value to 3.5 µg/dL (MMWR 2021)). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for Lead?

Common units are µmol/L, µg/dL, µg/L, nmol/L, ng/dL.