Calculadora de Creatinina
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
normal: 0,7-1,3 mg/dL (H), 0,6-1,1 mg/dL (M)
About this calculator
The Creatinine Calculator is a tool that assesses whether blood creatinine levels are within normal ranges for adults. Creatinine is a waste product produced by muscles and eliminated by the kidneys; elevated levels may indicate kidney impairment. The tool compares the entered value with reference ranges: 0.7 to 1.3 mg/dL for men and 0.6 to 1.1 mg/dL for women, providing a simple classification: normal, low, or high.
To use the calculator, enter the serum creatinine value in mg/dL and select gender. The result shows whether the value is within the expected range. This tool is useful for people who have received blood test results and want a quick interpretation before consulting a doctor. Remember that creatinine alone does not replace a full medical evaluation, which considers age, muscle mass, and health history.
When to use? Ideal after a routine blood test, especially if there is suspicion of kidney disease, diabetes, hypertension, or use of medications affecting the kidneys. It can also be used by healthcare professionals as an initial screening. Cautions: normal values vary with age and muscle mass; athletes may have higher levels. Dehydration and meat consumption can temporarily influence results.
This calculator does not replace complementary tests such as glomerular filtration rate (GFR) or urinary albumin/creatinine ratio. Consult a nephrologist for a full interpretation. The tool is for educational purposes only and does not provide a diagnosis.
Frequently asked questions
What does high creatinine mean?
High creatinine may indicate that the kidneys are not filtering waste properly. It can be a sign of acute or chronic kidney disease, dehydration, urinary obstruction, or certain medications.
Is low creatinine a concern?
Low creatinine is usually not concerning and can occur in people with low muscle mass, malnutrition, or liver disease. However, it should be evaluated by a doctor.
What is the difference between creatinine and urea?
Both are kidney markers, but urea is more influenced by diet and hydration. Creatinine is more stable and specific for kidney function.
Is the calculator suitable for children?
No, the reference ranges used are for adults. Children have different values that vary with age and muscle development.
Do I need to fast for a creatinine test?
Fasting is not required, but it is recommended to avoid excessive meat consumption the day before, as it can temporarily raise creatinine.