Calculate serum osmolality

Serum sodium: 

Serum glucose: 

Serum BUN:

Serum ETOH:

Calculated serum osmolality =

For a successful calculation, you must enter all of the values.  The ETOH value is set at a default of 0 but may be modified.

The formula for this calculation is:   

(2[Na+]) + [Glucose] + [BUN] +


18 2.8


Calculate serum alcohol once you have calculated serum osmolality:

Return to calculations home page