Normal Adult Lab Values

What is the normal sodium ($\text{Na}^+$) range?

$$136\text{--}145\,\text{mEq/L}$$

What is the normal serum potassium ($\text{K}^+$) range?

$$3.5\text{--}5.2\,\text{mEq/L}$$

What is the normal ionized calcium ($\text{Ca}^{2+}$) range?

$$4.65\text{--}5.28\,\text{mg/dL}$$

What is the normal total serum calcium range?

$$8.8\text{--}10.4\,\text{mg/dL}$$

What is the normal serum chloride ($\text{Cl}^-$) range?

$$96\text{--}106\,\text{mEq/L}$$

What is the normal magnesium ($\text{Mg}^{2+}$) range?

$1.8\text{--}2.6\,\text{mg/dL}$ (Note: Magnesium may be slightly lower during the second and third trimesters of pregnancy.)

What is the normal phosphate/phosphorus range?

$$2.7\text{--}4.5\,\text{mg/dL}$$

What is the normal Blood Urea Nitrogen (BUN) level for adults?

$$6\text{--}20\,\text{mg/dL}$$

What is the normal Blood Urea Nitrogen (BUN) level for adults over age 60?

$$8\text{--}23\,\text{mg/dL}$$

What is the normal serum creatinine range for males?

$$0.6\text{--}1.3\,\text{mg/dL}$$

What is the normal serum creatinine range for females?

$$0.6\text{--}1.1\,\text{mg/dL}$$

What is the normal AST range for males? aspartate aminotransferase

$$14\text{--}20\,\text{units/L}$$

What is the normal AST range for females?

$$10\text{--}36\,\text{units/L}$$

What is the normal ALT range for males?

$$10\text{--}40\,\text{units/L}$$

What is the normal ALT range for females? (alanine aminotransferase)

$$7\text{--}35\,\text{units/L}$$

What is the normal albumin range?

$$3.5\text{--}5.2\,\text{g/dL}$$

What is the normal prealbumin range?

$$19\text{--}38\,\text{mg/dL}$$

What is the normal serum $\text{CO}_2$ range?

$$23\text{--}30\,\text{mEq/L}$$

What is the normal anion gap?

$$8\text{--}16\,\text{mEq/L}$$

What is the normal serum osmolality range?

$$275\text{--}295\,\text{mOsm/kg H}_2\text{O}$$

What is the normal fasting blood glucose level for adults?

$\le 100\,\text{mg/dL}$ (SI value: $\le 5.6\,\text{mmol/L}$)

What is the normal hemoglobin A1c (HbA1c) level?

$$\le 5.6\%$$

What is the normal arterial blood pH range?

$$7.35\text{--}7.45$$

What is the normal $\text{PaCO}_2$ range?

$$35\text{--}45\,\text{mm Hg}$$

What is the normal $\text{HCO}_3^-$ range?

$$22\text{--}32\,\text{mEq/L}$$

What is the normal $\text{PaO}_2$ level?

$$>80\,\text{mm Hg}$$

What is the normal $\text{SaO}_2$ level? (arterial oxygen saturation)

>94\%

What is the normal white blood cell (WBC) count?

$4.5\text{--}10.5 \times 10^3\,\text{cells/mm}^3$ or $4.5\text{--}10.5 \times 10^9/\text{L}$

What is the normal RBC count for males?

$$4.2\text{--}5.4 \times 10^6/\text{mm}^3$$

What is the normal RBC count for females?

$$3.6\text{--}5.0 \times 10^6/\text{mm}^3$$

What is the normal hemoglobin (Hgb) range for males?

$$14\text{--}17.4\,\text{g/dL}$$

What is the normal hemoglobin (Hgb) range for females?

$$12\text{--}16\,\text{g/dL}$$

What is the normal hematocrit (Hct) range for males?

$$42\%\text{--}52\%$$

What is the normal hematocrit (Hct) range for females?

$$36\%\text{--}48\%$$

What is the normal platelet count?

$$140,000\text{--}400,000/\text{mm}^3$$

What is the normal prothrombin time (PT)?

$$11\text{--}13\,\text{seconds}$$

What is the normal INR for a patient not taking an anticoagulant?

$$0.8\text{--}1.2$$

What is the therapeutic INR range for a patient taking warfarin?

$$2.0\text{--}3.0$$

What is the INR range for a patient with a mechanical prosthetic heart valve?

$$2.5\text{--}3.5$$

What is the normal APTT range? (Activated Partial Thromboplastin Time)

$$21\text{--}35\,\text{seconds}$$

What is the normal total cholesterol range?

$$140\text{--}199\,\text{mg/dL}$$

What is the normal HDL range for males?

$$35\text{--}65\,\text{mg/dL}$$

What is the normal HDL range for females?

$$35\text{--}80\,\text{mg/dL}$$

What is the normal LDL-C level? (Low-density lipoprotein)

<100\,\text{mg/dL}

What is the normal LDL-P level?

$$<1,000\,\text{nmol/L}$$

What is the normal triglyceride level?

$$<150\,\text{mg/dL}$$

What is the normal Triiodothyronine level (T3) range for adults?

$$80\text{--}200\,\text{ng/dL}$$

During pregnancy: 116 to 247 ng/dL

What is the normal T3 range during pregnancy?

$116\text{--}247\,\text{ng/dL}$ (SI value: $1.8\text{--}3.8\,\text{nmol/L}$)

What is the normal T4 (Thyroxine) level range?

$$5.4\text{--}11.5\,\mu\text{g/dL}$$

What is the normal TSH range? (Thyroid-stimulating hormone  )

$0.45\text{--}4.5\,\mu\text{U/mL}$ (SI value: $0.45\text{--}4.5\,\text{mU/L}$)