Bradford Factor Calculator
Calculate B = S²D, average days lost per absence spell, and a one-spell comparison for the same total days.
A QUICK WALKTHROUGH
How to use this tool
- Number of absence spells (S)
- Total working days lost (D)
- Calculate
Formula and limits
Bradford Factor: B = S² × D, where S is the number of separate absence spells and D is total working days lost. Average spell length = D/S when S > 0. Comparison: the same total D in one spell has factor 1² × D = D. This is a descriptive arithmetic metric only. Never use it to make disciplinary or medical decisions. No trigger threshold is provided. Do not use this score for disciplinary or medical decisions. It is not a diagnosis or a decision rule.
Inputs stay in this browser.
Inputs stay in this browser.
GOOD TO KNOW
Common questions
Does this provide a trigger threshold?
No. It reports the arithmetic and a comparison only. It must not be used for disciplinary or medical decisions, and no threshold is recommended.