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Employee Absence & Lost Workday Calculator

Calculate the percentage of scheduled employee workdays lost to absence.

  • Formula & worked example
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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Edit a calculated value to solve backwards, or lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Use the result with context

Results are estimates for planning and education. Confirm rates, taxes, fees, and legal requirements with the relevant institution or a qualified professional before making a financial decision.

Formula and method

Divide absent employee-days by employees multiplied by scheduled workdays, then multiply by 100. Ten absent days across 20 employees and 20 workdays represent 2.5% of scheduled employee-days.

Absence (%) = absent employee-days ÷ (employees × workdays) × 100

Worked example

Enter these known values and leave the other values blank.

Total employees
20
Total workdays
20
Total days absent
10
Absenteeism rate
2.5 %

Assumptions and limitations

  • Inputs describe one consistent reporting period. Review the formula and counting conventions before comparing results.

Common questions

Should I count calendar days or employee-days?

Use employee-days: three employees absent for two scheduled days contribute six absent days. Keep the employee count and reporting period consistent.

References

The calculation equations, inverse formulas, units, and input rules were imported from this source. Bookify provides the interface and equation solver.

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