Blood test

Normal creatinine level in the blood

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Normal creatinine level in the blood

What is the normal level of creatinine in the blood?

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

Why normal levels can differ across different labs?

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.

What is the role of creatinine?

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.

What is a creatinine blood test used for?

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.

Where can I find more information about creatinine in the blood?

You can visit our pages about:

Which values are considered a normal creatinine level in the blood?

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.

Creatinine
Normality
0.7 mg/dl0.71 mg/dl0.72 mg/dl0.73 mg/dl0.74 mg/dl0.75 mg/dl0.76 mg/dl0.77 mg/dl
0.78 mg/dl0.79 mg/dl0.8 mg/dl0.81 mg/dl0.82 mg/dl0.83 mg/dl0.84 mg/dl0.85 mg/dl
0.86 mg/dl0.87 mg/dl0.88 mg/dl0.89 mg/dl0.9 mg/dl0.91 mg/dl0.92 mg/dl0.93 mg/dl
0.94 mg/dl0.95 mg/dl0.96 mg/dl0.97 mg/dl0.98 mg/dl0.99 mg/dl1 mg/dl1.01 mg/dl
1.02 mg/dl1.03 mg/dl1.04 mg/dl1.05 mg/dl1.06 mg/dl1.07 mg/dl1.08 mg/dl1.09 mg/dl
1.1 mg/dl1.11 mg/dl1.12 mg/dl1.13 mg/dl1.14 mg/dl1.15 mg/dl1.16 mg/dl1.17 mg/dl
1.18 mg/dl       
foto de Dr. Javier Muga Bustamante
Written by

Dr. Javier Muga Bustamante

Last update: 25/03/2020

Bibliography

  • Concise Book of Medical Laboratory Technology: Methods and Interpretations. 2nd Edition. 2015. Ramnik Sood. ISBN: 978-93-5152-333-8. Pag. 475.
  • NCCLS. Protocols for determination of limits of detection and limits of quantitation; approved guideline. NCCLS Document EP17-A. Pennsylvania: NCCLS, 2004.
  • Painter PC, Cope JY, Smith JL. Reference information for the clinical laboratory. In: Burtis CA, Ashwood ER, eds. Tietz textbook of clinical chemistry. Philadelphia:WB Saunders Company, 1999;1809pp. ISBN 9780721656106.
  • Ceriotti F, Boyd JC, Klein G, Henny J, Queraltó J, Kairisto V, Panteghini M. Reference intervals for serum creatinine concentrations: Assessment of available data for global application. Clin Chem. 2008; 54(3): 559-566.
  • Common Terminology Criteria for Adverse Events (CTCAE). Version 5.0.Published: November 27, 2017. U.S. Department of health and human Services. Disponible en: https://ctep.cancer.gov

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