Custom day length
Use 24 hours for calendar days, or a smaller value for work days, billable days or study days where only part of each day counts.
Example
Seven calendar days equal 168 hours. Seven work days at 7.5 hours per day equal 52.5 hours.
When to change hours per day
Keep 24 for ordinary time conversion. Change the value when you are converting work schedules, study plans, billable time or shifts.
Common mistakes
Do not use calendar days and work days interchangeably. A project lasting 10 calendar days is not the same as 10 work days unless work happens every day.
Last reviewed: 2026-05-17