Four hours a day sounds like a number. Sixty-one days a year sounds like a problem.
From your phone's own report
Of every year, on a screen
61 days
1,460 hours, counted as 24-hour days
The number that matters most
12.5 years of waking life
If you drop 30 minutes a day
Over the next 50 years
A calculator answers once. If you want this number to move over months, that needs a record: a free habit tracker that shows today, the month and the year.
Track it free
Both major phone systems keep a daily screen time average in their settings. Use the weekly average from there, not your guess. Guesses tend to run low, and the gap is usually the unlocks you do not remember: the 40-second checks that add up to an hour.
Then decide what counts. Phone only, or the laptop and the television too? Either is fine. Just know which one you entered, because the lifetime number moves a lot.
The years-of-your-life figure is striking and a little unfair. It counts screen hours against all 24 hours of a day, including the ones you sleep. The share of waking hours does not. Four hours a day out of sixteen awake is a quarter of your conscious time.
And not all screen time is equal. A video call with your mother and an hour of scrolling cost the same minutes. The page cannot tell them apart. You can. Cut from the part you would not choose again.
The cut-back slider is there because a total ban tends to last about a weekend. Thirty minutes a day is 7.6 days a year. That is a week of waking time, recovered without deleting anything, and the number shows up in your phone's weekly report where you can check it.
Days a year is daily hours × 365 ÷ 24. Years of your life is daily hours × 365 × the years you count ahead ÷ 8,760, the hours in a year. The share of waking time is daily hours ÷ hours awake.
Say your phone reports 3 hours 15 minutes a day, you are 30, and you count to 80. That is 1,186 hours a year, or 49.4 days. Over 50 years it comes to 6.8 years, and it is 20% of a 16-hour waking day. Cut 30 minutes a day and you get back 7.6 days a year, about 380 days over the 50.
| Daily screen time | Days a year | Share of 16 waking hours | Years over 50 years |
|---|---|---|---|
| 1 hour | 15.2 | 6.3% | 2.1 |
| 2 hours | 30.4 | 12.5% | 4.2 |
| 3 hours | 45.6 | 18.8% | 6.3 |
| 4 hours | 60.8 | 25% | 8.3 |
| 5 hours | 76.0 | 31.3% | 10.4 |
| 6 hours | 91.3 | 37.5% | 12.5 |
From your phone's screen time settings, weekly average.
The count-to age is a planning horizon, not a forecast.
Sixteen is typical. This drives the waking-hours share.
Move the slider to see days a year you would get back.
It reopens the page with your numbers, useful for checking again next month.
Multiply daily hours by 365 and by the years you are counting ahead, then divide by 8,760 hours in a year. Four hours a day for 50 years is about 8.3 years.
In your phone's settings, under screen time or digital wellbeing. Use the weekly daily average rather than today's figure.
Yes. It runs in your browser and nothing you enter is sent or stored.
There is no single agreed number for adults. A more useful test is the share of your waking hours, and whether you would choose those hours again. Pick a cut you can hold, such as 30 minutes a day, and check the weekly report.
Only if you entered it. The phone's report counts every app, so a commute spent on email is in there. Decide what you are measuring before you compare one month with the next.
More in quitting and cutting back, and the tools that pair with this one.
You will know by the end of it whether this is the tracker that sticks. That is a shorter test than most things you have tried.