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Absence Rates Velocity Calculator

Measure how quickly an absence rate is rising or falling between two periods, in percentage points per month.

Your Details

Overview

Use this Absence Rates Velocity Calculator to compare a starting and ending absence rate over a chosen number of months. It shows the total movement in percentage points, the relative change from the baseline, and the average monthly speed of change.

How it works

The calculator subtracts the starting absence rate from the ending absence rate to find the total change in percentage points. It then divides that change by the number of months to calculate the average monthly velocity. It also expresses the movement as a percentage of the starting rate, which can help compare changes across teams or periods with different baselines.

How to use this calculator

  1. 1Enter the absence rate at the start of the period.
  2. 2Enter the absence rate at the end of the period.
  3. 3Add the number of months between the two measurements.
  4. 4Review the monthly velocity and overall change.
  5. 5Compare results only where the underlying absence-rate method is consistent.

Example Calculation

Starting absence rate

4%

Ending absence rate

4%

Time between rates

6

Absence Rate Velocity

0.12 percentage points/month

The absence rate rises by 0.70 percentage points, equal to an average velocity of 0.12 percentage points per month. This is a 20.0% increase relative to the 3.5% starting rate.

Frequently asked questions

What is absence rate velocity?

Absence rate velocity is the average speed at which an absence rate changes over time. It is usually expressed as percentage points per month.

What does a negative absence rate velocity mean?

A negative result means the ending absence rate is lower than the starting rate, indicating an average decline over the period measured.

Why are percentage points used instead of percentages?

Percentage points show the direct difference between two rates. For example, a move from 3% to 4% is an increase of 1 percentage point, even though it is a 33.3% relative increase.

How should I calculate the absence rates used here?

Use a consistent method, such as total absence time divided by total scheduled working time, multiplied by 100. Apply the same rules to both periods.

Can I compare absence velocity between departments?

Yes, but compare departments only when their absence definitions, reporting periods, workforce coverage, and data quality are similar.

Does this calculator account for seasonal absence patterns?

No. It calculates the average change between two points in time. Seasonal illness, holidays, reorganisations, and one-off events can affect the result.

Explore Related Calculators

Absence Rates Velocity (Individual) CalculatorCompare an individual's absence rate across two periods and estimate how quickly that rate is changing over time.Calculate →Absence Rates Velocity (Team) CalculatorCompare team absence rates across two periods and estimate how quickly the absence rate is improving or worsening.Calculate →Absence Rates Velocity (Annual) CalculatorEstimate your annualized employee absence rate from absence days, average headcount, working days and the reporting period.Calculate →Absence Rates Sprint Capacity CalculatorEstimate your team’s realistic sprint capacity after allowing for planned and typical unplanned absences.Calculate →

Assumptions and warnings

Assumptions

  • Both rates are calculated consistently, using the same definition of absence and the same method for counting scheduled time.
  • The velocity is an average over the selected period and does not show month-to-month fluctuations.
  • A positive velocity indicates that the absence rate increased, while a negative velocity indicates that it decreased.
  • The calculation compares rates only and does not adjust for workforce size, seasonality, policy changes, or unusual events.
Absence Rates Velocity Calculator