Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Result
Current utilisation
76.3%
Weekly billings
$33,640
Annualised billings
$1,614,720
Hours from target per week
-4.0
Revenue per billable head
$201,840
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How to use this
- 1Enter billable team members.
- 2Enter available hours per person per week.
- 3Enter billable hours logged per week.
- 4Enter average billable rate ($).
- 5Enter target utilisation (%).
- 6Read your current utilisation on the right — it updates as you type.
- 7Hit Share to keep the scenario or send it to someone.
About this calculator
Utilisation is billable hours over available hours. Agencies target 70–80% — above 85% and the team burns out with no capacity to pitch new work.
Worked example
Using the values the calculator loads with:
Inputs
- Billable team members: 8
- Available hours per person per week: 38
- Billable hours logged per week: 232
- Average billable rate: 145 $
- Target utilisation: 75 %
Results
- Current utilisation: 76.3%
- Weekly billings: $33,640.00
- Annualised billings: $1,614,720.00
- Hours from target per week: -4
- Revenue per billable head: $201,840.00
What each field means
Inputs
- Billable team members
- The billable team members used in the calculation. Starts at 8 so you have a working example on load.
- Available hours per person per week
- The available hours per person per week used in the calculation. Starts at 38 so you have a working example on load. Accepted range: 1–60.
- Billable hours logged per week
- The billable hours logged per week used in the calculation. Starts at 232 so you have a working example on load.
- Average billable rate ($)
- The average billable rate used in the calculation, measured in $. Starts at 145 $ so you have a working example on load.
- Target utilisation (%)
- The target utilisation used in the calculation, measured in %. Starts at 75 % so you have a working example on load. Accepted range: 10–100 %.
Results
- Current utilisation
- Returned as a percentage and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Weekly billings
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Annualised billings
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Hours from target per week
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Revenue per billable head
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How does the agency utilization calculator work?
Utilisation is billable hours over available hours. Agencies target 70–80% — above 85% and the team burns out with no capacity to pitch new work. The underlying maths is: Utilisation = Billable hours ÷ Available hours. Capacity = Headcount × Hours × Target utilisation.
What do I need to enter?
5 values: billable team members, available hours per person per week, billable hours logged per week, average billable rate, and target utilisation. Each field starts with a sensible default, so you can change one number at a time and watch the result move.
What does the current utilisation result mean?
It is returned as a percentage and updates live as you edit the inputs, so you can compare two or three versions of a scenario in a few seconds.
Is this calculator free, and do I need an account?
Yes, it's free, and no account is required. Nothing you type is stored on our servers — the maths runs entirely in your browser.
How accurate is the result?
It applies the standard formula exactly, so the arithmetic is precise. Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
Who is this tool for?
It's built for anyone comparing money scenarios before committing — budgeting a payment, sanity-checking a quote, or seeing what a change in rate or term actually costs.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Agency Utilization Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/agency-utilization
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/agency-utilization" target="_blank" rel="noopener">Agency Utilization Calculator — RevenueLab</a> (2026).</p>
Source: [Agency Utilization Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/agency-utilization) (2026).