Estimated creatinine clearance.
CrCl - Cockcroft-Gault - Kidney Function - Renal Dosing
Free Creatinine Clearance Calculator - Cockcroft-Gault CrCl Estimator
Use this creatinine clearance calculator to estimate Cockcroft-Gault CrCl from age, sex, weight and serum creatinine. Compare actual, ideal and adjusted body weight methods, convert serum creatinine units, calculate BSA-normalized CrCl and estimate 24-hour urine creatinine clearance.
Creatinine Clearance Calculator
Choose estimated Cockcroft-Gault CrCl or 24-hour urine CrCl. Results are educational, not a diagnosis.
Estimated Creatinine Clearance
72 mL/min
Your result will appear here.
CrCl72
Weight Used78 kg
BMI27.0
Category60-89
CrCl position on scale
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Result Dashboard
Creatinine clearance result summary
Dashboard cards summarize estimated CrCl, serum creatinine, BMI, ideal weight, adjusted weight and BSA-normalized value.
Creatinine after unit conversion.
Weight references for CrCl.
BSA-adjusted context value.
Calculation Breakdown
Inputs used in your CrCl estimate
Transparent breakdown of age, serum creatinine, body size and selected formula method.
Quick Presets
Try common CrCl examples
Load examples to understand how serum creatinine, age and body weight change estimated clearance.
Important: Cockcroft-Gault estimates CrCl and may be inaccurate in unstable kidney function, pregnancy, extreme body size, unusual muscle mass or rapidly changing creatinine.
Cockcroft-Gault formula
CrCl = ((140 − age) × weight in kg) ÷ (72 × serum creatinine in mg/dL). For females, multiply the result by 0.85.
Ideal and adjusted weight
Devine IBW is 50 kg + 2.3 kg per inch over 5 feet for males and 45.5 kg + 2.3 kg per inch over 5 feet for females. Adjusted weight = IBW + 0.4 × (actual − IBW).
24-hour urine CrCl
Measured CrCl = urine creatinine × urine volume ÷ serum creatinine ÷ 1440 minutes. Units must be consistent for creatinine values.
Reference Context
CrCl ranges and interpretation guide
Use ranges as educational context only. CKD staging usually requires eGFR and urine albumin, not this calculator alone.
| CrCl / kidney function estimate | General context | What to do |
|---|---|---|
| 90 mL/min or higher | Often considered preserved clearance in adults | Use with clinical context and lab review |
| 60-89 mL/min | Mildly reduced range in many tools | Review risk factors and repeat testing as advised |
| 30-59 mL/min | Moderately reduced range | Discuss medication dosing and kidney evaluation |
| 15-29 mL/min | Severely reduced range | Medical review is important |
| Below 15 mL/min | Very low clearance context | Urgent specialist guidance may be needed depending on symptoms |
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SEO Kidney Function Guide
About creatinine clearance, what it measures and why it matters
Clean educational content for users searching for CrCl calculator, Cockcroft-Gault equation, serum creatinine and kidney function estimates.
What is creatinine clearance?
Creatinine clearance estimates how much creatinine is cleared from the blood by the kidneys over time. Creatinine is a waste product formed from normal muscle activity. Healthy kidneys filter creatinine from the blood and remove it in urine.
Creatinine clearance can be estimated from serum creatinine using equations or measured from timed urine collection plus blood creatinine.
What does this calculator measure?
The Cockcroft-Gault mode estimates CrCl from age, sex, weight and serum creatinine. The 24-hour urine mode estimates measured creatinine clearance from urine creatinine, urine volume and serum creatinine.
The page also calculates BMI, ideal body weight, adjusted body weight, body surface area and a BSA-normalized CrCl value for educational context.
Why creatinine can rise
Serum creatinine may rise when kidneys filter less efficiently, but creatinine can also be influenced by muscle mass, diet, hydration, medications, supplements and lab method. A single value should not be interpreted alone.
If creatinine rises unexpectedly or symptoms are present, professional review is important.
CrCl vs eGFR
CrCl and eGFR are related but not identical. Cockcroft-Gault CrCl is often used in medication dosing contexts. eGFR and urine albumin are commonly used together to screen, diagnose and monitor chronic kidney disease.
Always follow the method requested by your clinician, lab report or medication label.
How to use this calculator safely
- Enter accurate age, sex, height, weight and serum creatinine.
- Select the creatinine unit exactly as shown on your lab report.
- Compare actual, ideal and adjusted weight methods if body size is unusual.
- Use the PDF report as a discussion aid, not a treatment decision.
- Ask a qualified healthcare professional before changing medication doses.
When to seek medical advice
Discuss results with a healthcare professional if CrCl is low, creatinine is rising, urine output changes, swelling occurs, blood pressure is high, diabetes is present, kidney disease is known, or medications require renal dosing.
Seek urgent care for severe symptoms such as confusion, chest pain, severe dehydration, very low urine output or rapidly worsening illness.
Medical disclaimer: This creatinine clearance calculator provides educational estimates only. It is not medical advice, diagnosis, treatment, prescription or emergency guidance. Kidney function, medication dosing and abnormal lab results must be reviewed by a qualified healthcare professional.
FAQ
Creatinine Clearance Calculator FAQs
What is the Cockcroft-Gault equation?
It is a formula that estimates creatinine clearance from age, body weight, sex and serum creatinine.
Should I use actual, ideal or adjusted weight?
Actual body weight is commonly used, but ideal or adjusted body weight may be considered when body size is far from average. This calculator provides all three for comparison.
Can creatinine clearance diagnose CKD?
No. CKD diagnosis and staging usually require professional interpretation of blood tests, urine albumin and clinical history.
What is serum creatinine?
Serum creatinine is a blood measurement of creatinine, a waste product from muscle metabolism that kidneys help remove.
What is 24-hour urine creatinine clearance?
It uses a timed urine collection and blood creatinine to estimate how much creatinine is cleared over a full day.
Is this calculator free?
Yes. WisePro Toolbox calculators are free to use without registration.
Sources used for page logic
- Cockcroft-Gault formula and female multiplier for estimated creatinine clearance.
- Timed urine collection concept for creatinine clearance using urine and blood creatinine.
- Kidney testing context: GFR and urine albumin are commonly used to check for kidney disease.