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Clinical calculator summary

Carboplatin Calvert Formula Calculator

AUC-based carboplatin dosing formula using target exposure and kidney function.

Evidence-based context for fast calculator use

Purpose:
Support regimen-specific carboplatin dose calculation
Population:
Patients being considered for carboplatin where AUC-based dosing is used
Factors:
Target AUC, GFR or creatinine clearance, GFR cap policy, Cockcroft-Gault assumptions
Reference:
Calvert et al., J Clin Oncol 1989; FDA/NCI carboplatin dosing guidance
HomeCarboplatin Calvert Formula Dose
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Carboplatin Calvert Formula Dose

Clinical Context & Background

The Calvert formula estimates total carboplatin dose in milligrams from target AUC and kidney function: Dose = target AUC x (GFR + 25). The original formula used measured GFR; in practice, many protocols use creatinine clearance or other kidney-function estimates.
This calculator supports either direct GFR/CrCl entry or Cockcroft-Gault estimation. Because institutional protocols differ on measured GFR, estimated kidney function, serum creatinine rounding, and GFR capping, verify the result against the regimen protocol, pharmacy policy, and current renal dosing guidance before prescribing.
Formula Logic
Total dose (mg) = target AUC x (GFR + 25). Optional cap applies GFR/CrCl maximum of 125 mL/min before calculating the dose.

Reference Data

Target AUCTypical Context
AUC 4-6Common range for many single-agent or combination protocols; confirm regimen-specific target
GFR cap 125 mL/minCommon FDA/NCI-style maximum-dose convention; institutional practice may differ
Measured GFRPreferred when estimates are unreliable or accurate therapeutic dosing is critical

Clinical Workflow

Use, Interpret, And Continue The Patient Pathway

Expand for workflow guidance, limitations, examples, and related next steps.

When To Use

  • Use when a carboplatin-containing protocol specifies a target AUC and the appropriate kidney-function input is known.
  • Use only when the patient and clinical setting match the population described for Carboplatin Calvert Formula.

How To Interpret

  • The output is a total milligram dose; it is not a dose per square metre and depends directly on the kidney-function estimate.
  • Interpret thresholds with the entered units, current clinical status, and local guideline context.

What To Do Next

  • Verify regimen AUC, renal method, recent creatinine stability, institutional capping policy, and independent chemotherapy dose check.
  • Document the inputs, result, clinical judgment, and any reason for deviating from the model-guided pathway.

Limitations

  • Estimated creatinine clearance may be unreliable with unstable renal function, extreme body composition, low muscle mass, or non-standardized creatinine assays.
  • This calculator supports clinical assessment and does not independently prescribe treatment.

Validated Population

Patients receiving carboplatin when a regimen-specific target AUC and appropriate measured or estimated kidney function are available

Clinical example

At target AUC 5 and kidney function 75 mL/min, the Calvert equation gives 500 mg before protocol-specific verification and rounding.

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Frequently Asked Questions

Is the Calvert formula dose in mg/m2?

No. The Calvert formula calculates total carboplatin dose in milligrams, not mg/m2.

Should GFR be capped at 125 mL/min?

Some FDA/NCI-style guidance caps GFR at 125 mL/min to limit high calculated doses, but some modern kidney-dosing guidance and institutions may not cap. Follow the regimen protocol and pharmacy policy.

Evidence-based oncology decision support. Verify with clinical guidelines.