Worked example: 4.5 hours per day
The default example uses 4.5 screen hours per day, 7 days per week, current age 32, target age 80, and a 30-minute daily reduction.
Active days per year are (7 / 7) x 365.2425 = 365.2 days.
Annual screen time is 4.5 x 365.2 = 1,643.6 hours, or 68.5 full 24-hour days per year.
The remaining planning horizon is 80 - 32 = 48 years.
Remaining screen time is 1,643.6 x 48 = 78,892.4 hours, or 3,287 full days.
That equals 9.0 calendar years and 1,972 40-hour workweeks.
Cutting 30 minutes per active day would reclaim 365 full days across the same horizon.
How to calculate screen time as days of your life
Active days per year = days per week / 7 x 365.2425. Annual screen hours = screen hours per active day x active days per year. Annual screen days = annual screen hours / 24.
How much of my remaining life is screen time?
Remaining screen hours = annual screen hours x (target age - current age). Percent of remaining time = remaining screen hours / total remaining calendar hours.
How to estimate time saved by reducing screen time
Reclaimed hours = daily minutes cut / 60 x active days per year x remaining years. The calculator caps the cut at your entered daily screen time so the saved time cannot exceed the original habit.
Why this calculator does not use average screen time
Average screen-time statistics vary by country, age, work type, device category, measurement method, and date. This tool avoids invented averages and uses your own inputs instead.
What counts as screen time?
Use the definition that fits the decision. You can measure only phone time, only entertainment time, only work screen time, or total device time. Keep the definition consistent when comparing scenarios.
How to make a shareable screen-time result
Use the copy button to share the annual days, remaining screen days, workweeks, and reclaimed days. Avoid sharing personal ages if privacy matters.
