Irish Calculators
Work & pay

Compa Ratio Calculator: Salary vs Range Midpoint

Divide salary by the range midpoint to see the employee's compa ratio. Put both figures on the same hours basis; the ratio alone does not determine fair pay or a pay increase.

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Your numbers

€
€
Your figures stay on this device.

How the calculation works

Compa ratio shows where a salary sits relative to a salary-range midpoint. It uses the midpoint as its denominator, making it useful for a consistent pay-position description while leaving performance, role evaluation and pay decisions outside the calculation.

Compa ratio = employee salary ÷ range midpoint × 100.

  1. Match the two pay figures

    Confirm the employee salary and midpoint use the same currency, period and hours basis. Differences in those conventions can overwhelm the intended salary comparison.

  2. Divide by the midpoint

    Calculate salary divided by midpoint. The midpoint remains the reference whether the employee is below or above it.

  3. Express the ratio as a percentage

    Multiply by one hundred. A result of 100% represents the midpoint itself; values below or above it describe salary’s position on that reference.

Worked example: Below midpoint

Sample inputs demonstrate the method. They are not a forecast or product offer.

The example salary is €45,000 against a €50,000 midpoint. Dividing €45,000 by €50,000 yields 0.9, displayed as 90%. The €5,000 difference is measured against midpoint in the ratio, rather than against the current salary.

Employee salary (€)
45000
Salary range midpoint (€)
50000

Expected result

Compa ratio
90%
Worked example: Above midpoint

Sample inputs demonstrate the method. They are not a forecast or product offer.

Employee salary (€)
60000
Salary range midpoint (€)
50000

Expected result

Compa ratio
120%

Understanding your result

A 90% compa ratio says salary is nine tenths of midpoint. It does not mean that a 10% increase in the employee’s salary would necessarily reach the midpoint.

The ratio alone cannot establish fair pay or prescribe an increase. Different role scopes, pay structures and hours bases require consideration before comparing employee ratios.

Questions you might have

What does this compa ratio calculator include?

Compare an employee’s salary with the midpoint of a salary range using the same pay period and working-time basis.

Which assumptions should I check?

Use either full-time equivalent figures for both inputs or the same part-time basis. A ratio is descriptive and does not determine fair pay or a salary increase.

Choosing the right inputs

Employee salary
Use salary on the same pay-period and working-hours basis as the midpoint. If the midpoint is full-time annual pay, convert a part-time salary to a comparable basis first.
Salary range midpoint
Enter the relevant positive range midpoint. It is not the top of the range, a maximum budget, or automatically a market average unless that is how your range is defined.

Common mistakes to avoid

  • Do not compare a part-time cash salary directly with a full-time midpoint.
  • Compa ratio is not range penetration, which would require the range minimum and maximum as additional inputs.

Assumptions to check

  • Use either full-time equivalent figures for both inputs or the same part-time basis. A ratio is descriptive and does not determine fair pay or a salary increase.

Sources and method

Read our calculation and testing approach.