When you reserve with /reserve, every checkout the tools require must still be valid for the whole reservation, through the calculated end the form shows. Changing the Date, Start time or Duration refreshes the choices and any warning.
- Durations stop where a checkout expires. A checkout is valid through its displayed date (Eastern time), so a reservation can run until midnight at the start of the next day. Whole-day bookings follow calendar days.
- Duration too long? The form shortens it to the longest duration that works.
- Nothing fits? The form shows Review selection instead of Reserve and names the checkout that is the problem. Choose an earlier date or start time, change the tools, or ask for a renewal in the member portal. See Request a Tool Checkout.
- Tools you can't reserve through that time are hidden unless you already selected them. A selected tool marked (checkout required) stays visible so you can fix it. Shop and group prerequisites apply too.
Check the calculated end before you submit. A checkout that expires later does not change a reservation you already made. For the rest of the steps, see Reserve a Shop or Tool.
Last reviewed: October 2026