Deep Work Planner

How is the number of deep-work sessions calculated?

First, deep-work hours = total work hours − meeting hours − admin hours, never below zero. Then sessions are counted in a loop: if the remaining minutes cover a session, count it, subtract its length, and subtract a break only if the remaining time covers one. With 5.0 deep-work hours, 90-minute sessions and 15-minute breaks, that gives 3 sessions.

What does the chronotype setting change?

Only the text of the “best time window” line: 8:00 AM – 12:00 PM for the morning lark option, 9:00 AM – 1:00 PM for intermediate and 12:00 PM – 6:00 PM for the night owl option. It does not change the session count, the breaks or any other result. The windows are fixed labels chosen by the tool’s author, not something measured for you.

Why is the total break time less than sessions × break length?

There is no break after the final session, so total break time is (sessions − 1) × break length. Three sessions with 15-minute breaks show 30 minutes.

Why does a 10-minute session length become 15?

The tool enforces a 15-minute minimum session. A session length of 0, which is also what a cleared box becomes, falls back to 90 minutes. A break of 0 is accepted and counted as zero, so a cleared break box means no breaks.

What counts as shallow work?

The tool defines shallow work as meetings plus admin hours, nothing else. Time that is not assigned to meetings, admin or full sessions, for example the minutes left over when a final session does not fit, is not reported anywhere in the results.

Does the planner place sessions on the clock?

No. It returns counts and totals, and a separate peak-window label. If your sessions do not all fit inside that window, the tool does not notice. Compare the sessions you need against the window yourself.

What does “deep work” mean here?

In this tool it simply means the hours left after meetings and admin, used in blocks of uninterrupted work on one demanding task. It assumes all of that remaining time is genuinely available, so lunch, interruptions and ramp-up time are not subtracted unless you include them under admin.

Are 90-minute sessions the recommended setting?

90 minutes is the default value, not a finding. The tool counts whatever length you enter, so a 45- or 60-minute session length is just as valid and will produce more, shorter sessions from the same hours.