Creatinine Clearance (CrCl) Calculator
Creatinine clearance via Cockcroft-Gault.
Calculator
Creatinine Clearance (CrCl) Calculator Results
creat: 88 mL/min CrCl — Cockcroft-Gault. Use IBW per label.
Clearance Breakdown
| Measure | Value | Context |
|---|---|---|
| Answer | 88 mL/min CrCl | primary result |
| Band | Cockcroft-Gault | interpretation |
| Inputs | Age 50, 70 kg | as entered |
| Method | Drug-dosing classic | equation used |
| Reference | Guideline bands | range check |
| Next | Use IBW per label | action |
Recommendations
- ▸Average 2-3 seated readings; bring home + clinic logs to visits.
- ▸Confirm kidney numbers with lab eGFR plus urine ACR, not math alone.
- ▸Symptoms — chest pain, fainting, swelling — override every number here.
- ▸creat: 88 mL/min CrCl — Cockcroft-Gault. Use IBW per label.
Results
Clinical Score
82/100
Rating
88 mL/min CrCl
Main result
Cockcroft-Gault
Interpretation
Age 50, 70 kg
As entered
Drug-dosing classic
Equation
Use IBW per label
Action
Educational only, not medical advice. Standard clinical equations; confirm with your care team and lab reference bands.
Visualizations
Clinical gauges
Score vs 100
Clinical Score
Formula
Standard BSA, kidney and pressure equations.
Alternative Form
Variables
| Symbol | Name | Unit | Description |
|---|---|---|---|
| A | Input A | - | Primary |
| B | Input B | - | Secondary |
| C | Context | - | Sex/note |
| R | Answer | - | Result |
| S | Score | 0-100 | Rating |
Explanation
Named equations compute; guideline bands interpret.
Derivation
KDIGO, AHA/ACC and CKD-EPI references; education only.
Step-by-Step Calculation
Follow each step to understand how the result is calculated from your inputs.
Enter careful measures.
Apply the named equation.
Band against guidelines.
Note the method.
Set the next step.
Score completeness.
Worked Examples
See how the calculator works with different scenarios.
Scenario
Common adult inputs.
Inputs
Calculation
Equation applied
Result
Answer banded
Interpretation
Confirm with your care team.
Understanding Your Result
Your Result: Clinical Score: 82/100
Typical range: BSA ~1.7-1.9 adult; eGFR 90+ normal; MAP 70-100; BP <120/80 normal.
What This Means
The output computes BSA, kidney estimates or blood-pressure readings with banded interpretation.
Why It Matters
Bands turn raw vitals into triage language — normal, watch, act — while the math stays transparent.
Professional Interpretation
Clinicians trend these against baselines and confirm with labs — single readings inform, series decide.
Equations vs measures
eGFR and clearance estimate measured GFR within ~15-30%. Measured clearance rules disputes.
Cuffs and context
Wrong cuff size, caffeine, talking and full bladders each move BP 5-15 points.
Recommendations
- •Use correct units
- •Average repeat BP readings
- •Confirm kidney numbers with labs
- •Bring trends to visits
Educational Content
Introduction
This calculator applies the standard clinical equations behind BSA, kidney and pressure readings.
Concept Explanation
Height-weight geometry gives BSA; creatinine-age-weight equations estimate filtration; systolic-diastolic pairs map to perfusion and categories.
Applications
Benefits
- •Named-formula results
- •Band interpretation
- •Unit-safe math
- •Repeat-average guidance
- •Visit-ready outputs
Limitations
- •Estimates, not measures
- •Muscle mass skews creatinine
- •Single-reading noise
- •Pregnancy/age extremes differ
- •Not a diagnosis
Best Practices
- •Measure height shoeless
- •Rest 5 min before BP
- •Average 2-3 BP reads
- •Use morning creatinine trends
- •Bring meds list to visits
Common Misconceptions
Practical Tips
- •Right cuff size
- •Feet flat, back supported
- •No caffeine 30 min prior
- •Same scale, mornings
- •Log every reading
- •Bring lists to visits
Common Mistakes
Assumptions
This calculator makes the following assumptions to provide estimates:
Limitations
Be aware of these limitations when using this calculator:
Frequently Asked Questions
Answers to common questions about this calculator.
What is body surface area?
Which BSA formula is standard?
What is eGFR?
CKD-EPI vs MDRD?
What is creatinine clearance?
What is MAP?
What is pulse pressure?
What are BP categories?
One high reading — hypertension?
How do heart rate and BP pair?
When is low BP concerning?
When should I see a doctor?
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Glossary
Technical terms used in mortgage calculations explained in plain language.
- BSA
- Body surface area in m²; dosing and index denominator.
- Mosteller
- sqrt(cm x kg / 3600) — bedside standard.
- DuBois
- 0.007184 x W^0.425 x H^0.725 — classic reference.
- Haycock
- 0.024265 x W^0.5378 x H^0.3964 — pediatric pick.
- Gehan-George
- 0.0235 x W^0.51456 x H^0.42246.
- Boyd
- Weight-heavy formula with log correction.
- eGFR
- Estimated filtration, mL/min/1.73m².
- Creatinine
- Muscle-breakdown marker filtered by kidneys.
- Cockcroft-Gault
- ((140-age) x kg x 0.85F) / (72 x Scr).
- MAP
- (SBP + 2 DBP)/3; perfusion pressure.
- Pulse pressure
- SBP - DBP; stiffness and volume clue.
- CKD stages
- G1-G5 bands from eGFR thresholds.
Authoritative References
Trusted sources and standards referenced by this calculator.
Applicable Standards
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Page Information
2026-09-16
2.0.0
Free to use for educational and professional purposes.