Your screen time, in years
Move the two sliders. Each square below is one year of your waking life between now and 80.
12.5
waking years on a screen between now and 80
- Share of your waking day
- Each year
- Each week
Assumes 16 waking hours a day and that your average stays the same. 80 is a round number for the chart, not a prediction. Nothing you enter is saved or sent.
Where to find your number
On iPhone: Settings, then Screen Time, then See All App & Website Activity. Switch to Week and use the daily average. One heavy day will mislead you; the weekly average won't.
What the number is for
Not all of it is waste. Maps, a call with your mum, the book you're reading and half your job are in there. The chart shows the total so you can ask a narrower question: which hour of the day would you take back if you could? For most people it's a specific one, late at night, in two or three apps.
That's why the box under the chart looks at 30 minutes rather than the whole lot. Small, specific and daily is what adds up.
If the limit you set keeps getting ignored
Time Debt: Screen Time is an iPhone app blocker with one different rule: extra time today is borrowed from tomorrow.
- Set a daily allowance for the apps you choose, using Apple's Screen Time picker
- Out of time? Borrow 5, 10 or 15 minutes and see tomorrow's shorter allowance before you confirm
- Borrowed minutes are repaid once. No interest, and nothing compounds
- You can remove every shield until tomorrow at any time
Get Time Debt on the App Store
Free to download for iPhone. Details from the app's App Store description, checked 10 November 2026. This calculator is a separate web tool, not a feature of the app.
Questions
How do you convert daily screen time into years?
Divide your daily screen hours by 16, the hours most adults are awake, to get the share of your waking life. Multiply that share by the number of years you are counting. Four hours a day is a quarter of waking time, so over 40 years it adds up to 10 waking years.
Where do I find my daily screen time on iPhone?
Open Settings, tap Screen Time, then See All App & Website Activity. The Week view shows your daily average.
Is all screen time bad?
No. Maps, calls with family, reading and work all count as screen time. The calculator only does the arithmetic, so you can decide which hours you are glad of and which you would rather have back.