Carboplatin Calculator
Calculate carboplatin dose from target AUC, age, weight, sex, and serum creatinine using the Calvert formula.
Carboplatin Dosing Overview
Carboplatin is dosed by area under the curve (AUC) rather than by body surface area alone. The Calvert formula links target AUC to renal function. This calculator uses Cockcroft-Gault creatinine clearance and caps GFR at 125 mL/min for the maximum dose estimate.
Formulas
$$\text{Cockcroft-Gault (male)} = \frac{(140 - age) \times weight}{72 \times SCr}$$
$$\text{Cockcroft-Gault (female)} = \frac{(140 - age) \times weight \times 0.85}{72 \times SCr}$$
$$\text{Calvert dose (mg)} = AUC \times (GFR + 25)$$
Age is in years, weight in kg, and serum creatinine (SCr) in mg/dL. GFR is capped at 125 mL/min when calculating the maximum dose note.
Clinical Notes
Institutional protocols, actual body weight versus ideal weight, and alternative renal estimates may change the final prescribed dose. Always confirm with oncology pharmacy and local guidelines.
Frequently Asked Questions
What is target AUC?
AUC is the desired drug exposure for a cycle. Common targets are often 5 to 7, but protocols vary by regimen and patient factors.
Why cap GFR at 125?
Very high calculated clearance can overestimate dose. Capping limits the maximum Calvert dose in patients with excellent renal function.
Can I use creatinine in µmol/L?
This tool expects mg/dL. Convert µmol/L to mg/dL by dividing by 88.4 before entering the value.
Is Cockcroft-Gault the only renal estimate used?
No. Some centers use measured GFR or other equations. Follow your institution's carboplatin dosing policy.
Does sex affect the formula?
Yes. The female Cockcroft-Gault equation multiplies the numerator by 0.85.