Annual screen-time calculator
A daily average becomes easier to understand when it is shown as full days per year.
hours
Full days per year
68.3
- Hours per year
- 1638
- Hours per week
- 31.5
- Share of waking time
- 28.0 %
Show the working
- Average screen hours per day = 4.5
- Days per week = 7
- Weeks per year = 52
- Average sleep per day = 8
- Hours per week = 4.5*7 = 31.5
- Hours per year = 31.5*52 = 1638
- Full days per year = 1638/24 = 68.25
- waking_hours = (24-8)*365.2425 = 5843.88
- Share of waking time = 5843.88>0?1638/5843.88*100:0 = 28.0293
Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.
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The formula
- annual hours = daily hours x active days per week x weeks
Device reports differ in whether audio, navigation and overlapping screens count toward the total.