Conversion Table

Compound
Symbol
Atomic Weight
Valence
mEq/l
mg/dl
SI
Sodium
Na
23
1
(mg X valence)/atomic weight
(mEq X atomic weight)/valence
mmol/l*
Potassium
K
39
1
(mg X valence)/atomic weight
(mEq X atomic weight)/valence
mmol/l*

To convert from the SI unit to mEq, divide by the valence of the compound.

To convert from the SI unit to mg, multiply by the atomic weight of the compound.

1 mole = atomic weight in grams

1 mmol = atomic weight in milligrams

Examples:

Convert 50 mmol/L Na to mg/dL Na:

50 mmol/L Na X 23 atomic weight Na = 1150 mg/dL Na

Convert 3.3 mmol/L K to mg/dL K:

3.3 mmol/L K X 39 at weight K = 128.7 mg/dL K

To calculate concentration (% CHO) of a beverage from grams CHO:

(grams CHO/ volume of 1 serving, 240 ml per cup) X 100 = percentage

Convert 15 g CHO to % CHO in beverage

(15 grams/240 ml) X 100 = 6% CHO

Sources: The Nephron Information Center. Chemistry Conversions. Accessed June 14, 2007: http://nephron.com/cgi-bin/SI.cgi and Système International (SI) Conversion Factors for Selected Laboratory Components. Jounral of the American Medical Association. Accessed June 14th, 2007: http://jama.ama-assn.org/content/vol295/issue1/images/data/103/DC6/JAMA_auinst_si.dtl.



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