Internal Medicine · Emergency Medicine · Nephrology
Calculated Serum Osmolality (2×[Na+K]) calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
Allowed range: 100–180 mmol/L
Allowed range: 1–10 mmol/L
Allowed range: 0–1200 mg/dL
Allowed range: 0–200 mg/dL
Result
4 fields remaining
Anyone can run this calculator. Sign in to save, favourite, or send the result.
Ruqelo is AI and can make mistakes. Check important information.
Clinical inputs
- Serum sodium (mmol/L)Accepted range: 100 to 180
- Serum potassium (mmol/L)Accepted range: 1 to 10
- Serum glucose (mg/dL)Accepted range: 0 to 1200
- Blood urea nitrogen (mg/dL)Accepted range: 0 to 200
Primary source
Martín-Calderón JL et al. Choice of the best equation for plasma osmolality calculation: comparison of fourteen formulae. Clin Biochem. 2015;48:529-533. DOI: 10.1016/j.clinbiochem.2015.03.005. PMID: 25794428. Scope: calculated serum osmolality (mOsm/kg) = 2 × (Na + K) + glucose/18 + urea/6 with glucose and urea in mg/dL (urea/6 ≡ BUN/2.8); listed as an acceptable widespread 2(Na+K) equation. (2015)
View source