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Utilization Rate Calculator

Find what share of your working time is billable. The utilization rate calculator divides billable hours by available hours, shows the result against both scheduled hours and hours left after time off, and works out the billable hours and value for a target.

Runs in your browserFree, no signupFormula shown below
4 for a month, 13 for a quarter, 52 for a year.
Holidays, PTO, and other approved leave. Used for net utilization.
Optional
Admin, meetings, sales, training.
Your firm's or your own goal.

Net billable utilization

79%

120 h billable ÷ 152 h available after time off.

Utilization breakdown
Gross utilization (of 160 h scheduled)75%
Net utilization (after time off)79%

Always state which hours you divide by: the same billable time gives a higher percentage against net hours than against scheduled hours.

Where the scheduled hours went
Where the scheduled hours went
Scheduled hours160 h (Billable: 120, Time off: 8, Not logged: 32)

Utilization Rate Calculator, printed from employeecalculators.com/utilization-rate-calculator/. Estimates of gross amounts before taxes and deductions, based on the values entered; not payroll or legal advice.

How the utilization rate calculator works

  1. Enter billable hours for a period: a week, month, quarter, or year.
  2. Describe the period: scheduled hours per week and the number of weeks. Add hours of holidays and leave to get net utilization.
  3. Optionally add non-billable hours you logged, your billing rate, and a target percentage.
  4. Read both percentages. Gross utilization is against all scheduled hours; net utilization is against hours you were actually available.

Utilization rate formula

Utilization rate = billable hours ÷ available hours × 100
Gross: available hours = hours per week × weeksNet: available hours = gross available hours − time off
Billable hours for a target = net available hours × target %

Worked example: a month with a week of leave

40 hours a week for 4 weeks, 20 hours off, 112 billable hours, 30 non-billable hours, $95 an hour

  1. Scheduled hours: 40 × 4 = 160. Net available: 160 − 20 = 140.
  2. Gross utilization: 112 ÷ 160 = 70%. Net utilization: 112 ÷ 140 = 80%.
  3. Billable share of the 142 logged hours: 112 ÷ 142 = 78.87%.
  4. Billable value: 112 × $95 = $10,640. An 85% target needs 119 billable hours, 7 more than this month.

Gross vs net utilization

The same billable hours give a different percentage depending on what you divide by. In the example, 112 billable hours are 70% of scheduled time but 80% of the time actually available. Neither is wrong; they answer different questions. When you share a utilization figure, say which hours you divided by, and compare people or months using the same definition.

To see how many hours a full year holds after holidays and PTO, use the work hours per year calculator. To set a rate that works at your utilization, read how to set a freelance hourly rate.

Assumptions

  • Billable hours, time off, and non-billable hours are what you enter; the calculator does not round them.
  • Utilization can exceed 100% when billable hours are more than scheduled hours, for example with overtime.
  • Billable value is hours × rate before discounts, write-offs, or expenses.

Frequently asked questions

How do you calculate utilization rate?

Divide billable hours by available hours and multiply by 100. 120 billable hours out of 160 available is 120 ÷ 160 × 100 = 75%.

Should time off count as available hours?

It depends on what you want to measure, so say which one you use. Gross utilization divides by all scheduled hours and shows how much of the year is billed. Net utilization divides by hours actually available after holidays and leave, which is fairer for judging a busy month.

What is a good billable utilization rate?

There is no single standard. Targets are set by each firm and role, and depend on how much time goes to sales, management, training, and admin. A target of 100% leaves no time for any of that. Enter your own target to see the billable hours it requires.

Is utilization the same as realization?

No. Utilization measures hours: how much available time is billable. Realization measures money: how much of the billable value is actually billed and collected after discounts and write-offs.

How does utilization affect my hourly rate?

The fewer hours you bill, the higher your rate must be to reach the same income. The freelance rate calculator uses your billable percentage to find the rate that covers your income goal and expenses.

Related guides

How to Set a Freelance Hourly RateSet a freelance or contractor hourly rate that covers your income goal, expenses, time off, and unbilled hours. A worked example and a comparison with salary.
Freelance Rate CalculatorFind the hourly and day rate that covers your income goal, expenses, and unbilled time.Work Hours Per Year CalculatorWorking days and hours in any year, minus federal holidays and your PTO, with a month-by-month table.Hours and Minutes CalculatorAdd up a list of hours and minutes and get the total in decimal hours and pay.Annual Income CalculatorYour yearly gross income from pay, average overtime, bonuses, commission, tips, and other work.

How this calculator was built. The formula, defaults, and edge cases are documented in a research record and covered by automated tests. It estimates gross amounts from your inputs; it does not determine legal entitlements, taxes, or take-home pay. Read our methodology and disclaimer.

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