Deep Work Timer OnlineFree deep work timer based on Cal Newport's 90-minute focus block method. Distraction-free countdown for complex cognitive tasks and creative work.Frequently asked questionsHow long is ideal for a deep work timer session?Cal Newport recommends 1–4 hours of deep work per day for knowledge workers, with individual sessions of 60–90 minutes. 90 minutes aligns with the ultradian rhythm — the brain's natural 90-minute cognitive cycle. Start with 60 minutes if 90 feels daunting.What qualifies as deep work vs shallow work?Deep work: cognitively demanding tasks that push your skills — writing, coding, analysis, strategic planning. Shallow work: email, scheduling, routine admin, meetings. The deep work timer signals that the next 90 minutes are protected time for the hardest tasks on your list.Should I use the Pomodoro technique or deep work timer?Pomodoro (25 min + 5 min rest) suits tasks with interruption tolerance — email, administrative work, learning new material. Deep work timer (60–90 min continuous) suits tasks requiring sustained flow states — writing, complex coding, strategic analysis. Choose based on task type.How many deep work sessions should I do per day?Beginners: 1 session per day (90 minutes). Intermediate: 2 sessions. Advanced: 3–4 sessions (maximum for most people). Each session demands full cognitive intensity. Newport suggests even top academics rarely exceed 4 hours of true deep work daily.What should I do differently to make 90 minutes of deep work actually work?Phone in another room (not face down — out of sight). Browser tabs closed. Headphones with white noise or instrumental music. Tell coworkers/family you're unavailable. Clear your desk. Have water nearby. Write your task objective on paper before starting the timer.