Quick answer
Utilization rate = billable hours ÷ available hours × 100. 1,400 billable hours out of 1,800 available is 77.78%.
Enter billable and available hours. The calculator returns the utilization rate.
Related tools: Meeting Cost Calculator: Cost of a meeting from attendees and hourly cost. Monthly Working Days Calculator: Weekdays in a month less holidays you enter. Payroll Cost Calculator: Total payroll cost with a payroll burden you enter.
How to use the Utilization Rate Calculator
- Enter billable hours (0 or more).
- Enter available hours (above 0).
- Press Calculate to see the result, and use Reset to start again.
| Input | What to enter | Allowed values |
|---|---|---|
| Billable hours | A number | ≥ 0 |
| Available hours | A number | > 0 |
Formula and method
Formula
utilization = billable ÷ available × 100
IEEE-754 double precision; shown to the decimals indicated.
Use the same period for both.
Worked examples
These examples are verified: each one is an automated test case that the live calculator must reproduce exactly.
Example 1
Inputs: Billable hours = 1400; Available hours = 1800.
| Result | Value |
|---|---|
| Utilization rate | 77.78% |
Example 2
Inputs: Billable hours = 30; Available hours = 40.
| Result | Value |
|---|---|
| Utilization rate | 75% |
The first line is the headline result (utilization rate). IEEE-754 double precision; shown to the decimals indicated.
Setting targets
Consulting and agency teams often target 70 to 85%. 100% is unrealistic because of meetings, training, admin and leave. A rate of 77.78% means about 22% of available time was non-billable.
Defining available hours
Decide whether available hours exclude holidays and leave. Billable hours cannot exceed available hours. Compare the same definition over time.
Defining available hours in practice
1,400 billable hours out of 1,800 available is 77.78%. A 40-hour week with 30 billable hours is 75%.
Utilization depends on what you count as available. Some firms exclude holidays and paid leave from the denominator and others do not, so use one definition consistently when comparing periods.
How the result changes with available hours
Holding every other input at the first worked example, this table changes only available hours. It shows how sensitive the answer is to that one value; each row was produced by running this calculator.
| Available hours | Utilization rate |
|---|---|
| 1800 | 77.78% |
| 3600 | 38.89% |
| 7200 | 19.44% |
What happens with invalid input
These messages are produced by the calculator itself, so you know what to fix.
- Available hours: entering "0" shows "Available hours must be greater than 0." beside that field and no result.
- Billable hours: entering "50" shows "Billable hours cannot exceed available hours." beside that field and no result.
Choosing between the Utilization Rate Calculator and similar calculators
Each row shows what a related calculator on this site asks for and what it returns, so you can pick the one that matches your question.
| Calculator | You enter | It returns |
|---|---|---|
| [Meeting Cost Calculator](/business/meeting-cost-calculator/) | attendees, average cost per person per hour and duration | Meeting cost |
| [Monthly Working Days Calculator](/business/monthly-working-days-calculator/) | year and month | Working days |
| [Payroll Cost Calculator](/business/payroll-cost-calculator/) | employees, average annual salary and taxes and benefits on top of salary | Annual payroll cost |
| [Churn Rate Calculator](/business/churn-rate-calculator/) | customers lost and customers at start | Churn rate |
| [Conversion Rate Calculator](/business/conversion-rate-calculator/) | conversions and visitors | Conversion rate |
Background: business metrics
Business ratios depend on exactly which costs and revenues you include, so read each page's definition. Two common checks: break-even units = fixed costs ÷ (price − variable cost per unit), so $50,000 of fixed costs with a $10 price and $5 variable cost breaks even at 10,000 units; and net profit margin = net profit ÷ revenue, so $20,000 profit on $100,000 revenue is 20%.
Return on investment ignores time: 20% over five years is far less impressive than 20% in one, so compare returns over the same period.
Assumptions and limitations
- Billable cannot exceed available
If a required value is empty, not a number, or outside its allowed range, the form marks that field with a message and shows no result instead of a misleading number. The automated checks deliberately try invalid entries for available hours and billable hours to confirm this.
Frequently asked questions
What is a good utilization rate?
Often 70 to 80% for professional services.
Is it the same as productivity?
No, it measures billable time not output.
How can I raise it?
Reduce non-billable time and improve scheduling.
Should paid leave count as available hours?
It depends on the firm's definition. Pick one rule and apply it to every period so the trend is comparable.
Is 100% utilization a sensible target?
Usually not. Non-billable work such as admin and training means a target below 100% is normal.
What does the Utilization Rate Calculator calculate?
Billable hours as a share of available hours. It returns Utilization rate.
What formula does the Utilization Rate Calculator use?
utilization = billable ÷ available × 100. Use the same period for both.
What do I need to enter in the utilization Rate Calculator?
You enter Billable hours and Available hours.
How is the result rounded or limited?
IEEE-754 double precision; shown to the decimals indicated. Billable cannot exceed available.
What is an example of a utilization Rate result?
With billable hours 1400 and available hours 1800, the utilization rate is 77.78%.
Related calculators
- Meeting Cost Calculator — Cost of a meeting from attendees and hourly cost.
- Monthly Working Days Calculator — Weekdays in a month less holidays you enter.
- Payroll Cost Calculator — Total payroll cost with a payroll burden you enter.
- Churn Rate Calculator — Share of customers lost over a period.
- Conversion Rate Calculator — Share of visitors who convert.
- Productivity Rate Calculator — Productivity from output and input (hours, workers or cost).
Sources
- Common definition used on this page. No single authoritative standard defines it, so the exact formula is stated in the formula section above
Content last reviewed 2026-11-04. Formulas and worked examples are checked by automated tests against independently computed values.