What amount of oral sodium (in grams) corresponds to 100 mEq of sodium?

Medical Advisory BoardAll articles are reviewed for accuracy by our Medical Advisory Board
Educational purpose only • Exercise caution as content is pending human review
Article Review Status
Submitted
Under Review
Approved

Last updated: October 13, 2026 • View editorial policy

Have a follow-up question?

Our Medical A.I. is used by practicing medical doctors at top research institutions around the world. Ask any follow up question and get world-class guideline-backed answers instantly.

Ask Question

100 mEq of Oral Sodium Equals Approximately 2.3 Grams of Sodium

100 mEq of sodium corresponds to 2.3 grams (2,300 mg) of elemental sodium, which is equivalent to approximately 5.8 grams of sodium chloride (table salt). 1

Understanding the Conversion

The conversion is straightforward using basic chemistry:

  • 1 mEq of sodium = 23 mg of elemental sodium
  • 100 mEq × 23 mg = 2,300 mg = 2.3 grams of sodium

Multiple clinical practice guidelines consistently reference this conversion when discussing sodium intake recommendations. The American Journal of Kidney Diseases guidelines explicitly state that "2.3 g [100 mmol] of sodium" represents the tolerable upper intake level recommended by both the American Heart Association and Institute of Medicine for healthy adults 1.

Practical Context

When prescribing or counseling about sodium intake:

  • Salt vs. Sodium: Since table salt (sodium chloride) is 40% sodium by weight, 2.3 grams of sodium equals approximately 5.8 grams of salt 1. This is roughly one teaspoon of table salt 2.

  • Clinical Applications: This conversion is particularly relevant when:

    • Setting dietary sodium restrictions for patients with hypertension, CKD, or heart failure
    • Calculating sodium balance in dialysis patients 3
    • Prescribing sodium supplementation for salt-wasting conditions 2

Important Caveats

Medication sodium content: Many medications contain significant sodium that must be counted toward daily intake. For example, sodium polystyrene sulfonate (Kayexalate) contains 100 mg (4.3 mmol) of sodium per 100 g of powder 2. This is often overlooked but can significantly impact total sodium intake, particularly in patients on sodium-restricted diets.

Population-specific recommendations: While 100 mEq (2.3 g) represents the upper limit for general populations, specific patient groups may require different targets. Hypertensive dialysis patients may need more stringent restriction to 43-65 mmol (1-1.5 g) daily 1, while children with salt-wasting CKD may require supplementation of 2-4 mmol/kg/day 2.

References

1
Guideline

clinical practice guidelines for hemodialysis adequacy, update 2006.

American Journal of Kidney Diseases, 2006

Related Questions

With a serum sodium of 133 mEq/L after recent excessive sweating, should the sodium be rechecked once the patient has been free of sweating for at least 12–24 hours?
Is a persistently low serum sodium of ≤136 mmol/L, with all other basic metabolic panel values normal, indicative of a specific pathology?
How should free water be administered to a patient with a serum sodium of 168 mEq/L?
How many milliequivalents of sodium are needed to increase serum sodium concentration by 1 mEq/L?
How do I assess sodium and volume retention in a patient?
In a patient with tremor, bradykinesia, dizziness, and headache, whose brain MRI shows bilateral periventricular and deep white‑matter hyperintensities, subtle diffusion restriction, and thinning of the posterior corpus callosum, what is the likely diagnosis and what further evaluation is recommended?
Is there evidence that intubation is unnecessary in acutely intoxicated patients with a Glasgow Coma Scale score above 8, normal oxygenation, and stable vital signs?
What is the appropriate desmopressin dosing regimen for treating hyponatraemia in SIADH?
What is the best next-generation sequencing test platform for comprehensive clinical sequencing?
Is a preterm fetus more susceptible to umbilical cord compression, as indicated by variable decelerations?
What is the appropriate treatment for a 5 mm right‑sided renal stone in a woman who now has back pain and lower abdominal discomfort?

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.