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Bradford Factor calculator.

Spells × spells × days: how many separate absences someone has had, squared, times the total days off. It weights frequency over length, because five Mondays disrupt a team more than one bad week.

Separate occasions, usually over a rolling 12 months
All working days lost across those spells
162 Medium — worth an informal chat

Most policies suggest a supportive conversation around this level.

3 × 3 × 18 = 162

What the number usually means.

0 – 49Low. Nothing to act on — ordinary life happening at an ordinary rate.
50 – 199Medium. Often the point for an informal, supportive check-in — is everything alright, is there a pattern, does anything need adjusting.
200 – 449High. Many policies treat this as the trigger for a formal absence review meeting.
450 +Serious. Most policies escalate here — formal process, occupational health referral, or both.
Two honest caveats. Every employer sets its own thresholds — the bands above are common conventions, not law, so your organisation's absence policy is the one that counts. And the Bradford Factor is a blunt instrument: it cannot tell a disability-related absence from a duvet day, and using it without human judgement, or without regard to the Equality Act, gets employers into trouble. It is a prompt for a conversation, not a verdict.

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© 2026 Furrell · West Yorkshire All figures and names shown in demonstrations are invented.