Shape peak hours into focused work blocks. Auto fit tasks, buffers, and recovery time smartly. Finish each day knowing what matters got done first.
Tune your windows, commitments, and tasks. Then generate a realistic plan.
| Date | Wake–Sleep | Peak Window | Fixed (min) | Buffer (%) | Deep Block | Result Snapshot |
|---|---|---|---|---|---|---|
| 2026-02-19 | 07:00–23:00 | 09:30–12:30 | 120 | 10 | 50/10 | Peak: 180 min · Deep: ~150 min · Buffer: ~60 min |
Numbers vary based on tasks, breaks, and remaining time windows.
Peak minutes are the overlap between your day window and your chosen peak window. For example, a 07:00–23:00 day has 960 minutes. A 09:30–12:30 peak adds 180 minutes, or 18.8% of the day. Use this percentage to keep your best hours scarce and protected. If peak coverage is under 10%, reduce meetings inside that window first. If coverage is over 35%, narrow it to sharpen focus.
Deep blocks follow a repeatable cadence: setup cost, work block, then a short break. With a 3 minute setup, 50 minutes of work, and a 10 minute break, one cycle uses 63 minutes. Three cycles deliver 150 minutes of deep output and 30 minutes of recovery. Longer blocks increase output per setup, but fatigue rises after 90 minutes for many people. Use breaks as true recovery, not inbox time.
Buffer minutes are reserved from the task pool to absorb interruptions, overruns, and handoffs. The calculator uses Buffer = ceil(TaskPool × Buffer%). If TaskPool is 420 minutes and Buffer% is 10, the buffer becomes 42 minutes. Treat buffer as flexible capacity for urgent work, travel time, or spillover. If you frequently miss tasks, raise buffer before extending work hours, because reliability beats intensity.
Task estimates drive the entire plan, so apply quick quality checks. Label deep tasks when they require uninterrupted thinking, writing, or building. Label shallow tasks when they are reactive, routine, or communication heavy. If total task minutes exceed FreeForTasks, reduce scope or split tasks into smaller pieces. A practical rule is to keep any single task under 120 minutes, then review completion rates weekly. When you are unsure, add a 15% estimation cushion to deep tasks, and shift noncritical shallow tasks into the afternoon to protect momentum. every day.
Operationally, run the plan in the morning, export it, and compare planned versus actual. Track three numbers: deep minutes completed, shallow minutes completed, and buffer consumed. A healthy day often completes 70–90% of scheduled minutes, with buffer covering surprises. When buffer hits zero, move remaining tasks forward instead of compressing breaks. Over time, refine peak hours and block length based on what produces your best work.
It is the time range you want protected for high-focus work. The plan prioritizes deep blocks inside it, then schedules shallow items and buffer around your fixed commitments.
Deep tasks are packed into repeating cycles: setup cost, focused work block, then a break. If a deep task needs more time, it continues in the next available deep segment.
Buffer percent reserves a slice of your task pool for delays, unexpected requests, and overruns. A higher buffer improves reliability, but reduces planned task minutes, so tune it to your day’s volatility.
Switching into deep work often requires prep: opening files, recalling decisions, and defining the next step. The setup cost models that ramp time so your schedule stays realistic.
If your sleep time is earlier than your wake time, the calculator treats sleep as the next day automatically. Schedule rows may show (+1) to indicate next-day times.
Export the plan to share with a team, print it, or import it into a tracker. Compare the planned schedule with actual outcomes to improve estimates and protect future peak hours.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.