Advanced options
Your phone reports the real number in Settings (Screen Time / Digital Wellbeing): most people guess low by an hour or two. The point isn't zero, phones carry real life now; it's whether the number matches what you'd choose on purpose.
What The Screen Time Calculator Works Out
- Per year: daily phone hours x 365, divided by 24 to express it as full days. The average UK adult's phone screen time sits around four hours a day in survey data, which is about 60 full days a year; self-estimates run an hour or two below what the phone itself records.
- Share of waking hours: daily phone hours divided by the hours you are awake (24 minus sleep). Four hours against an eight-hour sleep is a quarter of waking life.
- By age 80 at this rate: the yearly figure multiplied by the years left to 80, shown in years. A 25-year-old on four hours a day is looking at roughly nine years of screen.
- What else fits: the same hours converted into books (at about 6 hours a book) and kilometres walked (at 5 km/h). Rhetorically loaded but arithmetically honest.
- Other screens (advanced): add TV, laptop and tablet hours to see the all-screens total per year and its share of waking time. Ofcom puts UK TV and video viewing at around four and a half hours a day on top of phone use.
- Target you would choose (advanced): enter the daily phone time you would pick on purpose and the calculator shows the days a year, years to your projected age and extra books that the difference represents. Friction beats willpower: apps off the home screen, greyscale mode, the charger exiled from the bedroom and a notification audit are the interventions with the best evidence.
- Project to age (advanced): changes the 80-year horizon. UK life expectancy at birth is about 79 for men and 83 for women, and higher for those already in middle age.
- Phone pickups per day (advanced): your phone also reports this. Dividing screen time by pickups gives the average session length; many people pick up 60-100 times a day for sessions of two or three minutes, which is the feed's infinite-scroll architecture doing exactly what it was designed to do.
- Hours per book and walking pace (advanced): override the 6-hour book and 5 km/h walking assumptions behind the comparison card.
- Per week (advanced): daily hours x 7, expressed against 8-hour working days. Four hours a day is 28 hours a week, close to a part-time job.