Radiation Therapy Fractionation Calculator
Calculate BED and EQD2 from the Linear-Quadratic model for radiation therapy planning. Compare fractionation schedules and assess normal tissue toxicity.
Medical Disclaimer
This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. Never disregard professional medical advice or delay seeking it because of results from this tool.
Inputs
Results
Total physical dose (Gy)
60
BED — Tumor (Gy)
72
How to Use This Calculator
- Enter total prescribed dose (Gy), number of fractions, and fraction size (Gy/fraction).
- Enter the alpha/beta ratio for the tissue of interest (typical: tumors 10, late-responding tissue 3).
- Read the biologically equivalent dose (BED) and equivalent dose in 2 Gy fractions (EQD2).
- Compare BED across different fractionation schemes to assess radiobiological equivalence.
- Use EQD2 to convert hypofractionated or SBRT doses to conventional fractionation equivalents.
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