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Health & Fitness

Creatinine Clearance (Cockcroft-Gault) Calculator

Estimated creatinine clearance from age, weight, serum creatinine and sex (Cockcroft & Gault, 1976).

Your inputs

Change any value, everything updates instantly.

Allowed range 18–110 yr.

Allowed range 30–250 kg.

Allowed range 0.2–15 mg/dL.

0 = Male · 1 = Female

Try an example

Creatinine clearance

72.73 mL/min

This means your creatinine clearance works out to 72.73 mL/min with the values you entered.

Creatinine clearance: 72.73 mL/min
Creatinine clearance
72.73 mL/min

What you are seeing

Each bar grows to show one result for your everyday situation.

The top bar is the main answer: 72.73 mL/min.

Change age (now 60) and every bar updates instantly.

Result explanation: Creatinine clearance

72.73 mL/min.

Real-life comparison: With age 10% higher, it would be 67.27 mL/min.

Low, normal or high? Clinical reference tool for education. Dosing decisions belong to a qualified clinician.

Graph and details

18416487110055111AgemL/min

How the answer changes with age

How to read this chart: The line shows the main result across the allowed range. The dot marks your input.

What this calculator does

Estimated creatinine clearance from age, weight, serum creatinine and sex (Cockcroft & Gault, 1976).

What your result means

This means your creatinine clearance works out to 72.73 mL/min with the values you entered.

Real-life numbers vary, prices, habits and conditions change, so treat this as a practical guide.

Results are shown rounded; the full value is used internally.

The formulas

The same formula runs every time you change an input.

1. Creatinine Clearance (Cockcroft-Gault)

CrCl = (140 − age) × weight(kg) ÷ (72 × SCr mg/dL) × 0.85 if female

Symbols

age
Age (yr)
kg
Body weight (kg)
scr
Serum creatinine (mg/dL)
female
Sex (option)

Why this formula works

This is the standard everyday arithmetic for this situation, using the values you enter.

Unit check

Inputs are converted to consistent units before calculating ✓

Worked example

  1. Substitute your values: Age = 60; Body weight = 72; Serum creatinine = 1.1; Sex = 0
  2. Apply the formula: CrCl = (140 − age) × weight(kg) ÷ (72 × SCr mg/dL) × 0.85 if female = 72.73

Common mistakes

  • Entering a value in the wrong unit (for example minutes instead of hours).
  • Using an outdated price or rate.
  • Forgetting extra costs or time that apply in your case.

Working for your numbers

  1. Substitute your values: Age = 60; Body weight = 72; Serum creatinine = 1.1; Sex = 0
  2. Apply the formula: CrCl = (140 − age) × weight(kg) ÷ (72 × SCr mg/dL) × 0.85 if female = 72.73

This means your creatinine clearance works out to 72.73 mL/min with the values you entered.

Frequently asked questions

What does this creatinine clearance (cockcroft-gault) calculator calculate?

Estimated creatinine clearance from age, weight, serum creatinine and sex (Cockcroft & Gault, 1976).

How accurate is the result?

The calculation follows the stated formula exactly. Your result is an estimate and depends on the accuracy of the values you enter.

Can I use different units or currencies?

Yes. Use the controls beside the calculator inputs. Conversions preserve the underlying value used by the formula.

Symbols and assumptions

age
Age (yr)
kg
Body weight (kg)
scr
Serum creatinine (mg/dL)
female
Sex (option)
  • Values entered are realistic for your situation.
  • Rates and prices stay constant over the period calculated.
  • Displayed values are rounded; internal values are not.

Sources and review

Reviewed 2026-09-25 · Next review 2027-09-25

Time and Frequency DivisionNISTHandbook 44 — specifications for weighing and measuring devicesNIST

Important limitation. Practical estimate for everyday planning. Real outcomes depend on prices, conditions and personal circumstances, check important figures before relying on them.

Quick reference

Creatinine Clearance (Cockcroft-Gault) Calculator: results for common inputs, worked out with the formula on this page.
ScenarioAge (yr)Body weight (kg)Serum creatinine (mg/dL)Creatinine clearance
Worked example60721.172.7273 mL/min
Half the amounts30360.55100 mL/min
Double the amounts1101442.227.2727 mL/min

Need the full picture? Get the detailed PDF report with charts, tables, formulas and working steps.

Reviewed 2026-10-18 · Next review 2027-04-18

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