#1585 · Productivity Tool

Solo Focus Calculator

Evaluate the quality of your focus sessions using planned time, actual focused minutes, interruption time, and task completion. The result estimates net focus efficiency and highlights whether interruptions or poor execution are limiting performance.

Calculator

Focus session inputs
minutes
minutes
minutes
%
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How to use this calculator

Enter planned focus minutes, actual session time, total interruption minutes, and the percentage of intended tasks completed.

Use consistent tracking rules so interruption data remains comparable over time.

What the result means

The main result is a combined focus score based on net focus efficiency and task completion. It rewards focused execution rather than time spent alone.

Focus Score = Net Focus Efficiency × 60% + Task Completion Rate × 40%

Longer sessions are not automatically better. The most useful session length is one that maintains quality without excessive recovery cost.

Example calculation

A 240-minute plan with 190 actual minutes, 35 minutes of interruptions, and 80% completion creates 155 net focus minutes and a score near 71.

Tips for better results

  • Record interruption sources, not just duration.
  • Use shorter blocks when interruption rates remain high.
  • Schedule demanding work during peak-energy hours.

FAQ

How long should a deep work session be?

Many people perform well with sessions between 45 and 90 minutes, but the best length depends on task difficulty, experience, and recovery needs.

What is a good focus efficiency percentage?

A net focus efficiency above 75% is generally strong when measured consistently and paired with meaningful task completion.

How many interruptions are too many during focused work?

The duration and recovery cost matter more than count alone. Repeated interruptions that consume more than 15% to 20% of session time are usually material.

How do I calculate the cost of context switching?

Add interruption time and estimated recovery time needed to resume the original task after each switch.

Why is my focus time high but task completion low?

Possible causes include unclear tasks, inaccurate estimates, excessive perfectionism, blocked work, or time spent on low-priority activity.

Focus score

85–100Excellent focus
70–84Good
50–69Average
Below 50Needs improvement

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