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Free tool

Utilization rate calculator

Utilization rate is billable hours divided by available hours. Available hours are the hours a person is expected to work in a year, less paid time off and holidays. Enter a normal week and the time off, and the calculator returns annual utilization and the billable hours per week a target needs.

Three weeks of vacation and holidays at 40 hours a week is 120.

Result

Utilization, 75%

Utilization
75%
Available hours per year
1,960
Billable hours per year
1,470
Weeks worked
49
Billable hours per week to hit the target
32

Runs in your browser. Nothing you type is sent or stored.

The formula

Utilization = billable hours / (hours per week x 52 - time off hours)

Terms

  • Utilization rate
  • Billable hours

Go deeper

How to calculate utilization rate and set targets by role

Common questions

  • Most firms leave paid time off and holidays out of available hours, so a person is not measured against weeks they were never expected to work. Whichever way you choose, use it for everyone and every period, or the numbers will not compare.
  • Principals spend more of their time on business development, management and mentoring, which is necessary and not billable. A single firm-wide target treats that work as a shortfall.
  • No. The calculator runs in your browser. Nothing you type is sent anywhere or stored.

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