Appointment duration determines the length of a bookable meeting in a Google Calendar schedule. A custom duration can fit a consultation or service that does not match a preset. Keep it separate from the availability period in which several appointments may fit.
Open the schedule configuration
On a computer, create an Appointment schedule or open the existing schedule for editing. Check the title and destination calendar before changing a setting that visitors use to select a meeting. Review whether the change should affect this booking page’s future availability.
Set the appointment length
Under Appointment duration, open the duration dropdown. Google’s setup guidance provides a Custom option for a different length. Enter the intended duration and review the weekly availability and scheduling window that surround it.
A duration longer than an available period cannot be assumed to produce a valid slot. Buffer settings, booking limits, and conflicts can further reduce the times offered. Do not change those protections merely to make a desired slot appear.
Verify the actual bookable interval
Continue through the setup and save. Open the booking page and inspect the start and end of a representative offered appointment. Confirm that its length matches the service description and leaves the intended preparation or transition time. Review existing booked events separately rather than promising that a schedule edit automatically resizes every earlier booking. If the page shows fewer choices than expected, compare duration with the configured availability and conflicts before recreating the schedule. A custom number in the editor is only useful when the resulting page offers valid appointments of that length under the current account’s actual booking rules.
References
Reviewed against the linked official product guidance on November 4, 2026. Features, limits, screen labels, and access can vary by account, platform, region, and organization policy.