Appendix C Conversion Factors for Biochemistry and Hematology

STANDARD INTERNATIONAL UNITS

A value in other units is multiplied by the factor to convert to S.I. units.

A value in S.I. units is divided by the factor to convert to other units.

bgcolor=white>Formula Weight

Component	Other Units	S.I. Units	Factor
Ammonia	17.03	μg∕dl	μmol∕l	0.59
Ammonium ion	18.04	μg∕dl	μmol∕l	0.554
Beta-hydroxybutyrate	104.1	mg/dl	mmol/l	0.096
Bicarbonate	61.02	mEq/l	mmol∕l	no change
Bilirubin	584	mg/dl	μmol∕l	17.1
Calcium	40.08	mg/dl	mmol/l	0.250
Calcium	40.08	mEq/l	mmol/1	0.5
Carotene	536.85	μg∕dl	μmol∕l	0.0186
Chloride	35.45	mEq/1	mmol/l	no change
Cholesterol	387	mg/dl	mmol∕l	0.0259
Copper	63.546	mg/dl	μmol∕l	157.4
Copper	63.546	μg∕dl	μmol∕l	0.1574
Copper	63.546	ppm or μg∕ml	μmol∕l	15.74
Creatine	131.14	mg/dl	μmol∕l	76.25
Creatinine	113.12	mg/dl	μmol∕1	88.4
Fluorine	19.00	mg/l	μmol∕l	52.64
Fluorine	19.00	ppm or μg∕ml	μmol∕l	52.64
Glucose	180.16	mg/dl	mmol∕1	0.0555
Iodine, protein bound	126.904	μg∕dl	μmol∕l	0.079
Iron	55.847	μg∕dl	μmol∕l	0.179
Ketones (acetoacetic acid)	102.1	mg/dl	mmol∕l	0.098 (0.1)
Lactate	89.07	mg/dl	mmol∕l	0.112
Lactic acid	90.08	mg/dl	mmol∕l	0.111
Lead	207.2	ppm or μg∕ml	μmol∕l	4.83
Lead	207.2	μg∕dl	μmol∕l	0.0483
Magnesium	24.305	mg/dl	mmol∕1	0.411
Magnesium	24.305	mEq/l	mmol∕l	0.5
Molybdenum	95.94	ppm or μg∕ml	μmol∕l	10.42

bgcolor=white>Vitamin B₁₂

Component	Formula Weight	Other Units	S.I. Units	Factor
Phosphate, inorganic (as P)	30.974	mg∕dl	mmol∕l	0.323
Phosphorus, inorganic	30.974	mg∕dl	mmol∕l	0.323
Phosphorus, inorganic	30.974	mEq/1	mmol∕l	no change
Potassium	39.098	mEq/l	mmol∕l	no change
Progesterone	314.47	ng/ml	nmol∕l	3.18
Protein-total	—	g/dl	g∕1	10
Selenium	78.96	ppm or μg∕ml	μmol∕l	12.66
Selenium	78.96	μg∕dl	μmol∕l	0.1266
Sodium	22.990	mEq/1	mmol∕l	no change
T₃ Tri-iodothyronine	646	ng/dl	nmol∕l	0.0155
T₄ Thyroxine	773	μg∕dl	nmol∕l	12.9
T₄ Thyroxine	773	ng/ml	nmol∕l	1.29
Urea	60.06	mg∕dl	mmol∕l	0.166
Urea nitrogen (2N∕molecule)	28.014	mg∕dl	mmol∕l	0.357
Vitamin A	286.44	μg∕dl	μmol∕l	.0349
Vitamin B₁₂	1355.42	ng∕dl	pmol∕l	7.38
1355.42	pg∕dl	pmol∕l	0.00738
Vitamin E	430.69	μg∕ml	μmol∕l	2.32
Zinc	65.38	mg∕dl	μmol∕l	152.95
Zinc	65.38	ppm or μg∕dl	μmol∕l	15.295
Bone calcium	40.08	% of Ash	mol∕kg of Ash	0.25
Bone magnesium	24.305	% of Ash	mol∕kg of Ash	0.41
Thyroid iodine	126.904	μg∕100 g	μmol∕kg	0.079
Tissue copper	63.546	ppm or μg∕g	μmol∕kg	15.74
Tissue fluorine	19.00	ppm or μg∕g	μmol∕kg	52.63
Tissue lead	207.2	ppm or μg∕g	μmol∕kg	4.826
Tissue manganese	54.938	ppm or μg∕g	μmol∕kg	18.20
Tissue molybdenum	95.94	ppm or μg∕g	μmol∕kg	10.42
Tissue selenium	78.96	ppm or μg∕g	nmol∕kg	12660
Tissue selenium	78.96	ppm or μg∕g	μmol∕kg	12.66
Tissue zinc	65.38	ppm or μg∕g	μmol∕kg	15.30
Liver vitamin A	286.44	ppm or μg∕g	μmol∕kg	3.49
Liver vitamin B₁₂	1355.42	pg∕g	pmol∕kg	0.74
Hemoglobin		g per 100 ml	g∕dl	no change
P.C.V. (packed cell volume)		%	l∕l	0.01
R.B.C. (red blood cells)		10⁶∕cu. mm	10¹²∕l	no change
R.B.C. (red blood cells)		10⁶∕μl	10¹²∕l	no change
W.B.C. (white blood cells)		10³∕cu. mm	10⁹∕l	no change
M.C.H. (mean corpuscular hemoglobin)		μμg	pg	no change
M.C.H.C. (mean corpuscular hemoglobin concentration)		%	g∕dl	no change
M.C.V. (mean corpuscular volume)		μ³	fl	no change
Platelets		10³∕cu. mm	10⁹∕l	no change

dl = 100 ml; cu. mm = mm³ = μl

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Source: Smith Mary C., Sherman David M.. Goat Medicine. 3rd edition. — Wiley-Blackwell,2023. — 976 p.. 2023

Appendix C Conversion Factors for Biochemistry and Hematology

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