Free calculator

Absence rate calculator

The absence rate is the share of available working time lost to absence. Enter your headcount, the working days in the period and the total days lost.

Absence rate % = days lost ÷ (employees × working days) × 100

Your numbers

For a full year, about 230 working days per full-time employee is a common starting point once weekends, public holidays and annual leave are removed. Use your own figure if you know it.

Absence rate 3.5%

Available working days
11,500
Days lost per employee
8
People absent on an average day
1.7

Planned leave (annual leave, public holidays) is normally excluded from days lost.

What the absence rate tells you

The absence rate turns days lost into a percentage, so a 20-person team and a 2,000-person company can be compared on the same scale. It answers a simple question: of all the time we expected people to work, how much did we lose to absence?

Worked example

  1. 50 employees each expected to work 230 days: 50 × 230 = 11,500 available days.
  2. Total sickness and unauthorised absence in the year: 400 days.
  3. Absence rate: 400 ÷ 11,500 × 100 = 3.48%.
  4. Days lost per employee: 400 ÷ 50 = 8 days.
  5. On an average day, 400 ÷ 230 = 1.7 people are absent, which is the cover you need to plan for.

Make the rate more useful

  • Split it by team, site and shift. A company-wide average hides the one team running at three times the rest.
  • Track it monthly, not just yearly. Seasonal peaks and sudden changes only show up over time.
  • Pair it with frequency. The same rate can come from a few long absences or many short ones. The Bradford Factor shows the difference.
  • Put a cost on it. The cost of absence calculator turns days lost into money, including cover.

For a fuller view of what absence data can reveal, read what is workforce intelligence or see attendance and absence patterns.

Frequently asked questions

What is the absence rate?

The absence rate is the percentage of available working time lost to absence in a period. It is calculated as days lost to absence divided by total available working days, multiplied by 100. It lets you compare teams, sites and periods of different sizes.

How do you calculate the absence rate?

Multiply the number of employees by the working days each was expected to work in the period to get available days. Divide the total days lost to absence by that number and multiply by 100. For example, 400 days lost out of 11,500 available days is an absence rate of 3.5%.

What counts as absence in the absence rate?

Usually unplanned absence such as sickness and unauthorised absence. Planned leave such as annual leave, public holidays and agreed parental leave is normally excluded, because it is not lost working time. Whatever you include, define it clearly and keep it consistent.

What is the difference between absence rate and Bradford Factor?

The absence rate measures how much time a group loses, as a percentage. The Bradford Factor scores an individual pattern, giving more weight to frequent short absences. Use the rate to track teams and trends, and the Bradford Factor to spot individual patterns that need a conversation.

Can the absence rate be calculated automatically?

Yes. If attendance and leave are recorded digitally, the rate can be calculated per team, site and week without spreadsheets. TeamzMate calculates it from attendance records and explains changes, for example which team or day of the week is driving a rise.

More free calculators

Bradford Factor calculator

Score short, frequent absences with S² × D.

Cost of absence calculator

Pay, on-costs and the cover absence triggers.

Overtime cost calculator

Annual overtime cost vs. hiring another person.

Labour cost percentage calculator

Share of revenue spent on labour.

See these numbers calculated for you, every week.

TeamzMate reads your attendance, schedules and payroll hours and explains absence, overtime and labour cost automatically, in plain words.

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