Billable hours calculator
Turn the time you worked into the amount you invoice — with the rounding increments professional firms actually use.
Run a practice that bills by the hour? Calenkli lets clients book (and pay for) your time directly — fewer gaps, fewer no-shows, more billable hours.
Get your booking linkFrequently asked questions
How do I calculate billable hours?
Add up the time you actually worked, round it to your billing increment, then multiply by your hourly rate. For example 2 hours 20 minutes at $150/hour, rounded to 6-minute units, bills as 2.4 hours = $360.
What is the 6-minute (0.1 hour) billing increment?
Many law firms and professional-services firms bill in tenths of an hour: every 6 minutes is 0.1 of a billable hour. Any time spent is rounded up to the next 6-minute unit, which is why tracking time accurately matters.
How do I avoid losing billable time?
The time that quietly slips away is usually scheduling and admin: arranging calls, sending reminders, rescheduling. Letting clients self-book and automating reminders keeps more of your day inside billable work.
Turn time into booked meetings
Calenkli gives you a free booking link: people pick a slot in their own timezone, answer your questions first, and the meeting lands on your calendar automatically.
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