Osmolarity Calculator
Chemistry & BiologyCalculate the osmolarity of a solution from solute concentration and dissociation factor.
Osmolarity
The osmolarity of the solution in milliosmoles per liter (mOsm/L).
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Chemistry & Biology calculators
Frequently Asked Questions
What is the dissociation factor?
The dissociation factor represents how many separate particles a molecule splits into when dissolved — sodium chloride dissociates into two ions, giving a factor of 2, while glucose does not dissociate, giving a factor of 1.
Why does osmolarity matter in biology and medicine?
Osmolarity determines the osmotic pressure of a solution, which governs water movement across cell membranes — accurate osmolarity is critical for preparing IV fluids and cell culture media that are safe and effective for biological tissue.
What is normal human blood osmolarity?
Normal human plasma osmolarity typically falls within a range of about 275 to 295 milliosmoles per liter, a tightly regulated value the body maintains through kidney and hormonal mechanisms.
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