How this calculator works
Short video is consumed in fragments, so the cost is easy to miss. Multiplying the daily figure by the days you actually use the app and then by 52 weeks gives the yearly total, and dividing by 24 puts it in full days, which is far easier to picture. The two comparisons put that total in familiar units. Cambridge English estimates about 200 guided learning hours per CEFR level, so the yearly hours divided by 200 is how many language levels the same time could buy. The World Health Organization recommends 150 to 300 minutes a week of moderate activity, so the yearly hours divided by 2.5 is how many weeks of that recommended exercise the time is worth.
Formula
weekly hours = daily hours x days per week. Yearly hours = weekly hours x 52. Full days = yearly hours / 24. CEFR levels = yearly hours / 200. Weeks of recommended exercise = yearly hours / 2.5.
Worked example
One and a half hours a day, seven days a week, is 10.5 hours a week and 546 hours a year, or 22.75 full days. That is 2.73 CEFR levels at 200 hours each, or 218 weeks of the 2.5 hour weekly exercise target.
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Frequently asked questions
Why compare with language learning?
Because guided learning hours are one of the few well documented ways to size a chunk of time. Two hundred hours per level is Cambridge English published estimate, so a yearly total converts into something concrete rather than a number of hours.
Is the exercise comparison realistic?
It shows the size, not a swap. Nobody spends 10.5 hours a week exercising, which is exactly the point: the same time comfortably covers the whole weekly activity recommendation many times over.
Does the app screen time figure match this?
Your phone wellbeing dashboard counts every session, including quick checks, so read the weekly total from there and divide by seven to get a daily figure. People routinely underestimate their own use by a third or more.
What if I only use it on some days?
Set the days per week to match. The yearly total scales linearly, so cutting two days a week cuts the annual figure by about 29%.