Not a lecture. Just the arithmetic on your screen time, and the case for getting some of that boredom back. The research says that is where ideas come from.
Every square is a year in front of you. The coloured ones are what your current pace reserves for a screen. Nothing here is fixed. Move the slider and watch them come back.
Same hours, a different life. This is what your screen time costs you every year, at your current pace.
Nobody misses being bored. But the empty, understimulated, mildly irritating moments are the ones researchers keep pointing at when they look for where original thinking starts, and they are the first moments a phone fills: the queue, the lift, the walk, the four minutes before sleep. Here is what the evidence actually shows, including where it is thin.
He who is everywhere is nowhere.Seneca, Letters to Lucilius 2, around 65 AD. The letter is a complaint that the sheer abundance of books was scattering readers: they got through more and kept less.
No detox, no cleanse, no phone in a drawer for a month. Just protect the small dead moments instead of filling them. Five that work for most people:
A number you looked at changes nothing. Choose one small commitment and type the phrase by hand. It takes ten seconds, and it is the only part of this page that has ever changed anyone's week.
Short answers, with the arithmetic and the sources in plain sight.
Multiply your daily screen time by 365 and divide by 24. At 4 hours a day, that is 61 days a year: every day from 1 January to 2 March, back to back. At 2 hours it is 30 days, at 6 hours it is 91. The table does the sum for the most common values.
| Screen time a day | Days a year | Every year, from 1 January to | Share of waking hours | Years out of the next 50 |
|---|---|---|---|---|
| 1 hour | 15 | 15 January | 6% | 2.1 |
| 2 hours | 30 | 30 January | 13% | 4.2 |
| 3 hours | 46 | 15 February | 19% | 6.3 |
| 4 hours | 61 | 2 March | 25% | 8.3 |
| 5 hours | 76 | 17 March | 31% | 10.4 |
| 6 hours | 91 | 1 April | 38% | 12.5 |
| 7 hours | 106 | 16 April | 44% | 14.6 |
| 8 hours | 122 | 2 May | 50% | 16.7 |
Days a year = hours a day × 365 ÷ 24. Assumes 16 waking hours a day; the last column assumes you are 30, with a life expectancy of 80.
Days a year = daily hours × 365 ÷ 24. Nothing else goes into it. Three and a half hours a day, for example, is 1,277.5 hours a year, which divided by 24 gives 53 days. The rest of the page works the same way: the share of your waking hours is daily hours ÷ 16, and the years ahead assume a life expectancy of 80. Every assumption is listed at the bottom of the page and on the About page.
On iPhone: Settings → Screen Time → See All Activity. On Android: Settings → Digital Wellbeing → Dashboard (the wording can vary slightly between manufacturers). Use the daily average for the week, not a single day and not a guess: it is the only honest number.
Take your screen hours for one year, multiply them by the years you have left and divide by 8,760, the hours in a year. At 30, with 4 hours a day and a life expectancy of 80, that is about 8.3 of the next 50 years. It is not a prediction: one hour a day less gives 2.1 of those years back.
Plausible, increasingly well measured, not proven. Writers and physicists who logged their best idea each day found that about one in five arrived while they were doing something unrelated (Gable, Hopper & Schooler, 2019). A preregistered 2025 experiment found that how far the mind wandered during a break predicted the improvement afterwards (McDaniel, Habibi & Kaplan, 2025). But a 2024 review of 27 studies concluded that a clear causal effect of boredom on creativity is not established yet (Zeißig et al., 2024).
Protect the small dead moments instead of filling them. Walk for twenty minutes with nothing in your ears, keep the phone in your pocket while you wait, move the charger out of the bedroom, delete the app but keep the account. Then come back in a month and check the new number. Every hour a day you take back is 15 days a year.
No. The calculation runs entirely in your browser: no account, no analytics, no advertising, no third-party tracking, and nothing you enter is sent to a server. The details are in the privacy note.