WORK BACKWARD
Start-By Calculator
Work backward from a deadline with room for preparation, breaks, and a buffer.
Save plans in this browser, or sign in to save them to your account. Save a copy keeps a separate version. Browser saves stay on this device.
PICK UP WHERE YOU LEFT OFF
Your saved plans
Plans saved in this browser appear here. Clearing browser storage removes them. Export a copy to keep it. Log in to use account saves.
Loading saved plans…
Good estimates make their assumptions visible.
These tools calculate from the numbers you enter. Example values are editable starting points, not measured averages. Dates and times use your browser’s timezone; a day of elapsed time is 24 hours. Save your own plans, adjust the assumptions, and compare the result.
Timers can recover elapsed time after a refresh. Keep this page open for alerts; sleeping devices and suspended tabs may delay sound. Your inputs are not sent to an AI or a media service.