Pay & rates
Utilization Rate Calculator
Calculate billable hours as a percentage of available hours for a defined period.
Use this capacity-planning metric to make billable-time assumptions explicit without treating utilization as a promise of demand.
What the result means
The result divides billable hours by available hours. Billable hours cannot exceed available hours in this bounded planning metric.
The formula
Billable hours / available hours * 100
Results are displayed to at most two decimal places. Calculations use the unrounded inputs.
A worked example
Put the formula to work
- Billable hours (hours per period)
- 1,000
- Available hours (hours per period)
- 1,600
Utilization rate: 62.5%
1,000 billable hours out of 1,600 available hours is 62.5% utilization.
How to use this calculator
- Choose one matching time period.
- Count genuinely billable hours.
- Count total available hours.
- Review nonbillable work and capacity assumptions.
Why this number matters
Utilization makes the difference between total capacity and client-billable time visible for rate and workload planning.
Input definitions
- Billable hours (hours per period)
- Hours assigned to client-billable work.
- Available hours (hours per period)
- Total hours available in the same period; must exceed zero.
Assumptions and limitations
- Does not predict demand, revenue, quality, taxes, leave, overtime, or staffing needs.
- Definitions of available and billable time vary by organization.
- A high percentage is not a guarantee of sustainable workload or income.
Methodology
The default result and worked example use the same calculation functions as the interactive tool. The formula cannot verify the quality or scope of your source data.
Read our calculation methodology
Last updated .