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Billable Utilization Calculator

Measure billable hours against available hours, the core economics of a services business.

About Billable Utilization Calculator

The billable utilisation is the share of available working hours that billable hours represents, expressed as a percentage. The same figure is also shown per 1,000 and as a "one in every N" odds statement, which is easier to reason about when the rate is very small. Absolute counts hide scale — a rate normalises the number so you can compare periods, channels or cohorts of different sizes, where higher is better.

Formula

Billable Utilization

Billable Utilisation = Billable hours ÷ Available working hours × 100

Billable hours
The subset being measured
Available working hours
The full population it is drawn from

Worked example

With the default values below, Billable Utilization Calculator returns Billable Utilisation of 70.88%. Change any input above and every figure here is recalculated in your browser.

Inputs used

Billable hoursminimum 0
1,290
Available working hoursminimum 0
1,820

Results

Billable Utilisation
70.88%
Remaining (whole minus part)
530
Equivalent per 1,000
708.8
One in Every
1.4

Step by step

  1. 1Values used
  2. 2Billable Utilization
  3. 3Billable Utilisation= 70.88
  4. 4Remaining (whole minus part)= 530
  5. 5Equivalent per 1,000= 708.8
  6. 6One in Every= 1.4

Assumptions and limits

  • The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • This is an estimate for general information and not professional financial, tax or legal advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is Billable Utilization calculated?

Billable Utilisation = Billable hours ÷ Available working hours × 100 The billable utilisation is the share of available working hours that billable hours represents, expressed as a percentage. The same figure is also shown per 1,000 and as a "one in every N" odds statement, which is easier to reason about when the rate is very small.

Why does Billable Utilization matter?

Absolute counts hide scale — a rate normalises the number so you can compare periods, channels or cohorts of different sizes, where higher is better.

What values do I need to enter?

This calculator takes 2 inputs: Billable hours, Available working hours. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.

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