Scottish Trace Element & Micronutrient Reference Laboratory

Scotland's specialised laboratory for trace elements and vitamins in health and disease

Units for Blood Lead Measurement

Units for blood lead can be confusing. Most clinical laboratories in the UK report results in µmol/l to be consistent with the reporting of all other clinical measurements in mol/L units. However, the legislation for lead exposure is still based on a blood lead measurement in a now archaic unit, µg/100 mL. The unit of volume for either mass (e.g. µg) or molar (e.g. µmol) unit standards is now the litre (L) and logically a system set to 100 mL as volume should have no place in modern science.

Please note that the units µg/100 mL are also referred to as:

  • µg/dL where dL = decilitre
  • mcg/100 mL.

Conversion of Units for Blood Lead

To convert a result from one set of units to another, enter the result in the appropriate box and click on Convert. Reset clears all values from the boxes.

µmol/L
µg/L
µg/100 mL
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