As we know One pmol/μL is equal to 0.001 mM (1 pmol/μL = 0.001 mM).

To convert Picomole/Microliter to Millimolar, multiply your pmol/μL figure by 0.001.

Example : convert 25 pmol/μL to mM:

25 pmol/μL = 25 × 0.001 mM = mM

To convert Millimolar to Picomole/Microliter, divide your mM figure by 0.001.

Example : convert 25 mM to pmol/μL:

25 mM = 25 ÷ 0.001 pmol/μL = pmol/μL