Your utilization rate is the share of your working time that a client actually pays for. Enter your hours below for the percentage, add your rate to see what an hour of your working life is really worth, and add an income goal to find the rate you need to hit. No sign-up, and nothing you type is stored.
Your hours
How efficiently your working time converts into income. Count everything you worked, including admin, invoicing and marketing.
Your rate
Optional. With a rate the calculator also shows your effective hourly rate.
Your income goal
Work out the utilization your income needs
Your own pay plus business costs.
52 minus holidays and downtime.
The week you intend to work, not the one you fear.
Your result
Enter your billable and total hours above and the result appears here.
How it works
- Enter your billable and total hours. Billable means hours you can legitimately put on a client's invoice, not the hours you did invoice. Then decide whether total means the hours you worked or the hours you were available, because the two give different answers from the same week.
- Add your hourly rate. The percentage becomes an effective hourly rate: your headline rate scaled by how much of your time earns.
- Check it against your income goal. Enter what the business needs to bring in and the weeks and hours you'll work, and you get the utilization that goal requires rather than an industry average.
The arithmetic behind all three is in our guide to calculating your utilization rate, along with the current benchmarks and what to do when the number disappoints. British English spells it utilisation and American English utilization, and it's the same measure and the same sum either way.
Frequently asked questions
What is the formula for utilization rate?
Billable hours divided by total hours, multiplied by 100. If you worked 43 hours last week and 27 were billable, your utilization rate is 62.8%. The only decision that changes the answer is whether total hours means the hours you worked or the hours you were available to work.
What is a good utilization rate?
For a solo freelancer, 60% to 70% of hours worked is a healthy band. SPI Research put the average for professional services firms at 66.4% in 2025 and treats 75% as high-performer territory, though those figures measure available hours rather than hours worked, so they aren't directly comparable to a freelancer's number.
Should I use hours worked or available hours?
Use hours worked if you want to know how efficiently your time converts into income, which is the usual freelance question. Use available hours if you want to know how full your book is. The two can differ by five points or more on the same week, so record which one you used alongside the number.
What is an effective hourly rate?
Your headline rate multiplied by your utilization. At £50.00 an hour and 62.5% utilization, every hour you work earns £31.25. It's the figure to compare against a salary, because a salary pays for your admin hours too. Our guide on setting your hourly rate runs the same arithmetic from the other end.
Is this utilization calculator free?
Yes. There's no account to create and no email address to hand over, and nothing you type is stored on our servers. The numbers live in your browser session and go when you close the page.
Can 100% utilization be a bad sign?
Yes. Every freelance business needs unpaid hours for proposals, invoicing, learning and the projects that overrun. A sustained rate above 75% usually means the business development has stopped, and the empty pipeline arrives about a quarter later.
Stop estimating the hours you're dividing
A utilization rate is only as honest as the timesheet under it, and the hours that go missing on a Friday afternoon are almost always the unpaid ones. VibaCloud builds your week from the meetings already in your Outlook or Google calendar, keeps non-billable lines on the sheet at zero value, and reports the split for you. Free to use, no card needed.
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