Best/Most reliable resource for Lab Values on NCLEX RN??

Students NCLEX

Updated:   Published

Hi everyone,

I know there is a lab value sheet floating around AN. In fact, I am pretty sure I have it downloaded already.

Still, I am curious if anyone out there knows of the most accurate data base or source for actual "normal" values/limits that will show up on the NCLEX RN for 2013-2016.

I know lab values across resources are all relatively similar or close in range. However, I'll admit I am a bit dyslexic with numbers. Combined with my testing anxiety I simply want a strong/reliable set of values that will keep me "safe" when taking the NCLEX.

In school I always referenced my Lewis Med-surg book... however, I have noticed on more than one occasion, that Kaplans ranges are a bit different. Between 3 resources (Lewis, Saunders, and Kaplan) the numbers all vary to some extent.

If anyone could share a link or post lab values that held true for you while taking the NCLEX-RN, I would truly appreciate it. Also, if you have any tip/tricks or mnemonics for keeping numbers straight please share.

For example (values from Lewis)


Na+ 135-145

K+ 3.5-5.0


pH 7.35-7.45

pCO2 35-45


85 Posts


I use the NCSBN course, on there they have all the labs and they are the makers of the Nclex

K+ 3.5- 5

Ca+ 4.5.- 5

Mg 1.5-2.5

Phos 1.8-2.6

Na+ 135-145

Cl 95-105

Crt .5-1.2

BUN 10-20

PTT 60-70 or 1 � times higher if on Heparin

PT 11.0 - 12.5 or 2.o -3.5 times higher if on coumadin

INR 2.0-3.5 for coumadin

WBC 5-10


HCT 40

Hgb 15

pH 7.35-7.45 (40)

co2 35-35

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