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Common Laboratory (LAB) Values [ P ]

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Lab (Specimen)

Conventional Units

SI Units

Parathyroid hormone (PTH), intact  (serum) top of page 11 - 54 pg/ml 1.2 - 5.8 pmol/L
Partial thromboplastin time (PTT)  (plasma)
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20 - 36 sec 20 - 36 sec
Phosphorus (serum)
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2.5 - 4.5 mg/dL 0.81 - 1.45 mmol/L
Platelet count (blood)
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150,000 - 450,000/µL 150 - 450 x 109/L
Potassium (serum)
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3.5 - 5 mEq/L 3.5 - 5 mmol/L
Prealbumin (serum)
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18 - 45 mg/dL 180 - 450 mg/L
Progesterone (serum)

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Male:
0.3-1.0 ng/mL

Female:
0-8 days: 0-8 ng/mL
9 days-12 years: 0-1.0 ng/mL
Follicular: 0.2-0.8 ng/mL
Luteal: 4.1-23.7 ng/mL
Mid-luteal: 4.5-25.2 ng/mL
Postmenopaus.: 0.1-0.6 ng/mL
1st trimester: 11.2-90.0 ng/mL
2nd trimester: 25.6-89.4 ng/mL
3rd trim: 48.4-422.5 ng/mL
Prolactin (serum)

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Age   Male
(ng/mL) 
Female
(ng/mL) 
<1 mo  3.7-81.2  0.3-95.0 
1-11 mo  0.3-28.9  0.2-29.9 
1-3 y  2.3-13.2  1.0-17.0 
4-6 y  0.8-16.9  1.6-13.1 
7-9 y  1.9-11.6  0.3-12.9 
10-12 y  0.9-12.9  1.9-9.6 
13-15 y  1.6-16.6  3.0-14.4 
Adults  2.1-17.7  2.8-29.2 
Nonpregnant: 2.8-29.2 
Pregnant: 9.7-208.5 
Postmenopausal: 1.8-20.3 
Prostate specific antigen (PSA) (serum) Male
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0.0 -  4 ng/mL 0.0 -  4 µg/L
Protein, total (serum)
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6.0 - 8.5 g/dL 60 - 85 g/L
Protein, total (urine)
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< 150 mg/day < 150 mg/day
Protein C activity (plasma)
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70 - 140% of nml 0.7 - 1.4 of nml
Protein C antigen (plasma)
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70 - 140% of nml 0.7 - 1.4 of nml
Protein electrophoresis (serum)

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Total protein 6 - 8.5 g/dL
Albumin
56.0 - 69.7% |  3.6 -4.8 g/dL
Alpha-1 globulins
1.4 - 2.9%  |   0.1 -0.2 g/dL
Alpha-2 globulins
7.3 - 12.6%  |   0.5 -0.8 g/dL
Beta globulins
9.0 - 14.8%  |  0.6 -1.0 g/dL
Gamma globulins
8.0 - 18.2%  |  0.5 -1.3 g/dL
Total protein 60 - 85 g/L
Albumin
36 -48 g/L
Alpha-1 globulins
1- 2 g/L
Alpha-2 globulins
5 - 8 g/L
Beta globulins
6 - 10 g/L
Gamma globulins
5 - 13 g/L
Protein S activity (plasma)
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Male: 70 - 150% of nml
Female: 58 - 130% of nml
Male: 0.7 - 1.5 of nml
Female: 0.58 - 1.3 of nml
Protein S antigen (plasma)
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Male: 70 - 140% of nml
Female: 70 - 140% of nml
Male: 0.7 - 1.4 of nml
Female: 0.7 - 1.4 of nml
Prothrombin time (PT)  (plasma)

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9 - 12.5 seconds

INR: International Normalized Ratio. The INR serves to normalize results obtained from different laboratories for the variable responsiveness of different thromboplastin reagents. Each thromboplastin is assigned an International Sensitivity Index (ISI) based on comparison to an international reference thromboplastin from the World Health Organization. The formula for calculating the INR is:
INR = [patient's results/normal patient average](ISI)
9 - 12.5 seconds
Pyruvate (blood)
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0.3 - 0.9 mg/dL 34 - 102 µmol/L

Important Notes  top of page icon

>Unless noted, all values are for adults.
>All laboratory values listed are method dependent (Methods include: immunoassay, colorimetry, electrophoresis, HPLC, etc).
>Values may vary between laboratories.
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Medical Calculators - A thru Z
Lab Values - A thru Z