Billable vs total hours (agency health). The Utilization Rate Calculator takes billable hours in the period, available working hours, target utilisation and returns utilisation rate plus gap to target, extra billable hours needed to hit the target. Results update as you type, and the formula is shown under the result so you can repeat it in your own spreadsheet.
Operational metrics turn time and capacity into money. Small improvements in utilisation, cycle time or defect rate compound across every unit produced, so measure them regularly. Use the worked example below to check the maths against your own figures.
How the Utilization Rate Calculator works
Agencies and consultancies aim for 70–80% utilisation for delivery staff; higher leaves no time for learning and selling, lower erodes margin.
Worked example
With the example values (billable hours in the period of 1200 hours, available working hours of 1800 hours, target utilisation of 75%), the utilisation rate is 66.67%; gap to target -8.33%, extra billable hours needed to hit the target 150.0 hours. Change any figure above and the result updates immediately; use Copy results to paste the summary into a note or email.
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Frequently Asked Questions
How is utilisation rate calculated?
utilisation = billable hours ÷ available hours.
Which figures do I need?
Billable hours in the period, available working hours, target utilisation. Take them from the same period and the same set of accounts or reports so the ratio is consistent, and check the example values as a guide to the units expected.
How do I use this in practice?
Measure the metric for a normal week, set a target, change one thing, and measure again. Operational gains come from many small, verified improvements.
