Adult men: 0.7 - 1.18 mg/dL
Adult women: 0.5 - 1.2 mg/dL
Children from 3 to 15 years old: 0.24 - 0.73 mg/dL
Infant from 2 months to 3 years old: 0.15 - 0.37 mg/dl
In the International System of Units (SI), creatinine in the blood is measured in µmol/L. The normal creatinine level in the SI is:
Adult men: 62 - 105 µmol/l
Adult women 45 - 107 µmol/l
Children from 3 to 15 years old: 21 - 65 µmol/l
Infant from 2 months to 3 years old: 13 - 33 µmol/l
Each laboratory must establish its own normal ranges for creatinine in the blood. These ranges depend on the makeup of the local population, the technologies used and the accuracy of the measurement. There may be also slight differences in the normal levels according to age, gender, race or ethnic origin, geographic region, diet, type of sample and other relevant status.
Your doctor will study the results along with your medical record, screenings, physical condition, symptoms and any other relevant information about your situation.
Creatinine is a breakdown product of creatine. Creatine is found in large amount is skeletal muscles. Creatine provides the energy (ATP) that muscles need to move. The creatinine level in the blood is quite stable. Creatinine production depends on muscle growth.
With an average muscle growth and with a proper protein intake, creatinine gives information about kidney state.
Creatinine in the blood depends on age, corpulence, race and sex. It can be low in case of low muscle mass, cachexia, amputees and old people.
A normal creatinine level in the blood cannot rule out a kidney failure.
Creatinine is a muscle mass indicator and an indirect marker of kidney status. Creatinine level in the blood depends mainly on muscle mass.
High creatinine level in the blood suggest a kidney problem and a follow-up it is necessary. Low creatinine level in the blood does not provide too much information.
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The following values are considered to be normal values:
IMPORTANT: These levels are expressed in mg/dl They are an example of a healthy man of about 45 years of age with no known disease, an adequate muscular tone, not taking any medication and with an appropriate intake of protein in the diet. The ranges can be different depending on the laboratory or on your personal circumstances.
|0.7 mg/dl||0.71 mg/dl||0.72 mg/dl||0.73 mg/dl||0.74 mg/dl||0.75 mg/dl||0.76 mg/dl||0.77 mg/dl|
|0.78 mg/dl||0.79 mg/dl||0.8 mg/dl||0.81 mg/dl||0.82 mg/dl||0.83 mg/dl||0.84 mg/dl||0.85 mg/dl|
|0.86 mg/dl||0.87 mg/dl||0.88 mg/dl||0.89 mg/dl||0.9 mg/dl||0.91 mg/dl||0.92 mg/dl||0.93 mg/dl|
|0.94 mg/dl||0.95 mg/dl||0.96 mg/dl||0.97 mg/dl||0.98 mg/dl||0.99 mg/dl||1 mg/dl||1.01 mg/dl|
|1.02 mg/dl||1.03 mg/dl||1.04 mg/dl||1.05 mg/dl||1.06 mg/dl||1.07 mg/dl||1.08 mg/dl||1.09 mg/dl|
|1.1 mg/dl||1.11 mg/dl||1.12 mg/dl||1.13 mg/dl||1.14 mg/dl||1.15 mg/dl||1.16 mg/dl||1.17 mg/dl|