Productivity Calculator
Estimate focus efficiency, weekly output capacity, and time to finish a deliverable from deep-work hours, interruptions, and context-switch overhead.
Last updated: 2026-03-25
Productivity calculator
Enter your values
Turn your planned focus time into a more realistic weekly capacity estimate before you commit to a deadline.
Focus Efficiency
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Enter your deep-work time, interruption load, and goal size to estimate true weekly output capacity.
Calculation History(0)
Example calculations
Tap an example to prefill the calculator with sample values.
Focused maker schedule
Strong deep-work blocks, moderate interruptions
A good baseline for an individual contributor who can still protect part of the week for concentrated execution.
Result: Healthy efficiency with a realistic time-to-goal once overhead is counted
Fragmented manager week
Low protected focus time and heavy switching
Useful for stress-testing whether your week can realistically support a large deliverable without reclaiming focus time first.
Result: Calendar time looks available, but usable output capacity is much lower than it first appears
How the productivity model works
The calculator starts with protected deep-work hours, subtracts time lost to interruptions and context switching, then discounts the remaining time by your real completion rate to estimate weekly output capacity.
That capacity is compared against a deliverable-hours target, which gives a more realistic time-to-goal projection than assuming every planned work hour turns into finished work.
Productivity FAQs
How the calculator treats interruption loss, context switching, and why weekly capacity is smaller than scheduled time.
What is the focus efficiency score?
It is the share of your protected deep-work time that survives interruption loss, context switching, and task-completion friction. It is a planning metric for usable output capacity, not a judgment score.
Why model interruptions and context switches separately?
Because a quick interruption is not the same as dropping one task, loading another, and trying to re-enter the first later. Many people underestimate the recovery cost of switching even when the interruption itself feels short.
How should I choose the completion rate?
Use the percentage of planned work that turns into finished, usable output in a normal week after revisions, coordination overhead, and abandoned tasks. The honest number is usually lower than your initial guess.
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