Chemotherapy Dose Re-Derivation and Variance
Re-derives an ordered chemotherapy dose from the regimen and the patient's size, with the percent variance.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Dose basis of the regimen
- mg/m²
- Regimen dose per m² or per kg
- 75
- Height
- 180.5 cm
- Actual weight
- 72 kg
- Body surface area formula the order used
- Mosteller
- Ordered dose
- 150
Result: Calculated 142.5 mg; ordered 150 mg; variance +5.3%.
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Dose basis of the regimen
- Regimen dose per m² or per kg
- Height (needed for a dose per m²)
- Actual weight
- Body surface area formula the order used (needed for a dose per m²)
- Ordered dose (mg, or units)
- Dosing weight, if policy uses one other than actual (optional)
- Percent reduction for this cycle (optional)
The other 2 fields
- Institutional body surface area cap (optional)
- Tolerance for a pass or fail (optional)
How this is calculated
Citation
Arithmetic identity (dose per unit of body size times size). Weight basis: Griggs JJ, et al. Appropriate Systemic Therapy Dosing for Obese Adult Patients With Cancer: ASCO Guideline Update. J Clin Oncol 2021;39:2037-2048. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.