Estimates eGFR from serum creatinine using the equation for Japanese adults.
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Calculation basis and official references
Reviewed on:
This calculator is not a diagnosis, treatment plan, or prescription. Please consult a qualified clinician about your medical decisions. This equation applies to adults aged 18 and over only.
Formula basis
eGFR (mL/min/1.73m2) = 194 x serum creatinine (mg/dL) to the power of -1.094 x age (years) to the power of -0.287. For females, multiply the result by 0.739. The resulting eGFR value is classified into six stages: G1 (90 or above), G2 (60-89), G3a (45-59), G3b (30-44), G4 (15-29), and G5 (below 15).
Calculation method
Estimates eGFR (estimated glomerular filtration rate) from serum creatinine, age, and sex using the equation developed for Japanese adults, and shows the corresponding CKD GFR stage (G1-G5).
Exclusions and checks required
This equation applies only to adults aged 18 and over; this calculator does not accept ages under 18. A different equation is required for children.
It assumes an enzymatically measured serum creatinine value (reported to two decimal places); results vary with measurement method, muscle mass, and recent food intake.
A full CKD assessment requires the GFR stage plus proteinuria/albuminuria staging, the underlying cause, and confirmation that the finding persists for 3 months or more. A single estimate does not by itself establish kidney function status.
Example input:：Example: 40-year-old male, serum creatinine 0.8 mg/dL
age
40
sex
Male
cr
0.8
An eGFR of 85.9 mL/min/1.73m2 (stage G2) is a reference figure; a single estimate cannot by itself determine whether CKD is present.
Who is this calculator for? Kidney Function (eGFR)
Estimates eGFR from serum creatinine using the equation for Japanese adults.
What values should I enter?
Applies to: Lab values
How should I interpret this estimate?
Estimates eGFR (estimated glomerular filtration rate) from serum creatinine, age, and sex using the equation developed for Japanese adults, and shows the corresponding CKD GFR stage (G1-G5).
How to use
Enter your input values and press Calculate.
Review the result and compare it with expected context.
eGFR (mL/min/1.73m2) = 194 x serum creatinine (mg/dL) to the power of -1.094 x age (years) to the power of -0.287. For females, multiply the result by 0.739. The resulting eGFR value is classified into six stages: G1 (90 or above), G2 (60-89), G3a (45-59), G3b (30-44), G4 (15-29), and G5 (below 15).