Enter Your Timing and Energy Details
The calculator keeps a single vertical page flow, while the input grid expands to three columns on large screens.
Track energy patterns, schedule deep work, and breaks. See hourly scores for sharper daily planning. Turn scattered effort into consistent output with smarter timing.
The calculator keeps a single vertical page flow, while the input grid expands to three columns on large screens.
This example shows how the timer can convert energy patterns into practical work windows.
| Time Slot | Sample Score | Level | Suggested Use |
|---|---|---|---|
| 07:00 AM | 78 | Strong | Preparation, planning, and inbox clearing |
| 09:00 AM | 91 | Peak | Creative writing, coding, analysis, strategy work |
| 01:30 PM | 58 | Moderate | Admin work, routine reviews, lighter tasks |
| 04:00 PM | 74 | Strong | Calls, structured tasks, collaborative sessions |
| 08:00 PM | 63 | Moderate | Wrap-up, planning tomorrow, low-pressure work |
The calculator builds an hourly productivity score, then searches for the best full-length focus windows based on your selected timer block.
Base Energy = Morning, Afternoon, or Evening energy rating
Chronotype Adjustment = Time-of-day bonus or penalty
Sleep Adjustment = (Sleep Hours − 7.5) × 0.8
Caffeine Adjustment = Boost × decay over 4 hours
Recovery Bonus = ((Short Break + Long Break ÷ Cycles Before Long) ÷ Focus Block) × 1.8
Penalties = Meeting Load + Task Load + Stress + Midday Dip + Late Fatigue
Productivity Score = clamp((Base Energy + Adjustments − Penalties) × 10, 0, 100)
Peak Window Score = Average score across one complete focus block
The highest non-overlapping windows become your top recommended focus periods for the day.
It represents a combined estimate of how suitable each time slot is for focused work. Higher scores suggest better conditions for deep work, complex decisions, and demanding cognitive tasks.
Chronotype shifts your natural peak hours. Morning types usually perform earlier, evening types often rise later, and balanced types stay productive across a wider middle portion of the day.
The model gives caffeine a temporary boost that fades over roughly four hours. This helps reflect the short-lived lift many people feel after coffee or similar stimulants.
Many people experience a natural early afternoon slump. The calculator includes a modest circadian dip around midday, which can lower scores even when your overall energy remains decent.
Timer efficiency compares planned focus minutes against total planned focus plus break minutes. A higher percentage means more of your scheduled timer time is spent on concentrated work.
No. It is a planning aid, not a strict rule. Use it to shape better timing decisions, then adjust for deadlines, team meetings, family needs, and personal preferences.
Use low-score periods for lighter work such as email, routine admin, filing, reviews, or transition tasks. Save your strongest windows for deep or creative work.
Recalculate whenever your sleep, meetings, stress, or task mix changes. Updating the inputs daily can make the timer recommendations more realistic and useful.
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.