Deep Work Calculator
Find out how many hours of deep, focused work you can fit into your day. Based on Cal Newport's Deep Work framework. Enter your schedule and get an optimized plan — everything stays private in your browser.
Deep-to-Shallow Ratio
Recommended Daily Schedule
What Is Deep Work?
Deep work, a concept coined by Cal Newport in his 2016 book, refers to professional activities performed in a state of distraction-free concentration that push your cognitive capabilities to their limit. These efforts create new value, improve your skill, and are hard to replicate. Examples include writing, coding, strategizing, learning, and creating. Deep work is the opposite of "shallow work" — logistical tasks like email, meetings, and administrative duties that can be performed while distracted.
Why Deep Work Matters
In a knowledge economy, the ability to perform deep work is becoming increasingly rare and increasingly valuable. Newport argues that those who cultivate this skill will thrive. Research shows that context switching — bouncing between tasks, checking email, responding to messages — can cost up to 40% of productive time. A single deep work session of 90 minutes can produce more meaningful output than an entire day of fragmented, shallow work.
How to Protect Your Focus Time
Block deep work sessions on your calendar as non-negotiable appointments. Close email and messaging apps during these blocks. Use a timer to maintain focus. Tell colleagues your deep work hours. Start with 60-90 minute blocks and build up to longer sessions as your concentration muscle strengthens.
The Deep-to-Shallow Ratio
Newport recommends tracking your deep-to-shallow work ratio. Most knowledge workers discover they spend only 1-2 hours per day on deep work despite working 8+ hours. The ideal ratio depends on your role — a professor might aim for 4:1 (deep:shallow), while a manager might target 1:1. This calculator helps you see your current ratio and optimize it.
Break Strategies
The Pomodoro Technique (25 minutes on, 5 off) works well for building focus habits. The 52/17 rule (52 minutes on, 17 off) was found by DeskTime to be the pattern of the most productive workers. 90-minute blocks align with the brain's natural ultradian rhythm. Experiment to find what works best for your work style.