How to Use This Tool
Apply a visible sodium correction factor for glucose above 100 mg/dL. Several correction factors are published, and applying one without the original glucose, units and clinical situation can mislead treatment.
What Corrected Sodium actually establishes
The factor is editable because the appropriate relationship is debated and may vary at very high glucose concentrations. The page returns estimated corrected sodium in mmol/l from the measurements named below; Corrected Sodium does not verify how they were collected or combine them with symptoms, examination findings and medical history.
Equation and input contract for Corrected Sodium
Corrected sodium equals measured sodium + factor × max(0, glucose − 100) ÷ 100. The required entries are Measured serum sodium, Measured glucose, Sodium correction per 100 mg/dL above 100; values should come from the same dated observation, specimen or record unless a label explicitly calls for different dates.
- For Corrected Sodium, Measured serum sodium uses the example
130mmol/L; replace it with the value and unit from the same record. - For Corrected Sodium, Measured glucose uses the example
500mg/dL; replace it with the value and unit from the same record. - For Corrected Sodium, Sodium correction per 100 mg/dL above 100 uses the example
1.6mmol/L; replace it with the value and unit from the same record.
Using estimated corrected sodium in mmol/l safely
Use the equation selected by the treating team and do not use this browser result to direct fluid or insulin treatment. For Corrected Sodium, an unexpected answer should prompt a check of units, dates, transcription and the original measurement method. Do not adjust medicine, feeding, fluids, exercise, screening or treatment to make the result match an expected value.
The page-specific limit of Corrected Sodium
This is an estimate for printed units and excludes measured osmolality, fluid status, ketoacidosis, timing and treatment changes. Preserve that limitation with any saved estimated corrected sodium in mmol/l. A reference interval or action threshold still depends on the patient, collection method, laboratory and clinical setting, none of which this arithmetic selects automatically.
Evidence reviewed for Corrected Sodium
The attached reference is NIH MedlinePlus — Sodium blood test. It supports the equation, definition or measurement practice used for estimated corrected sodium in mmol/l, while the original report and a licensed pediatrician, physician, pharmacist or other relevant professional remain authoritative for interpretation.
Emergency boundary
Do not use a calculator during a possible emergency. Severe breathing difficulty, blue or gray color, seizure, fainting, new confusion, stroke symptoms, inability to wake or rapid deterioration require urgent local medical help.
Privacy and repeatability for Corrected Sodium
Corrected Sodium runs in the current browser tab without requesting a name, login or medical-record connection. Keep identifying details out of the fields, preserve the original units and remember that extra decimal places cannot repair an uncertain measurement.
Sources & assumptions
Tool Spec v2 · verified 2026-08-22. Platform rules and fees can change; the editable inputs remain authoritative for your account.
Official references
- NIH MedlinePlus — Sodium blood test (checked 2026-08-22)
Model assumptions
- Every value is entered in the unit printed beside its field.
- This is an estimate for printed units and excludes measured osmolality, fluid status, ketoacidosis, timing and treatment changes.
- This educational calculation is not a diagnosis, prescription, emergency assessment, or substitute for a licensed clinician.
