How is the yearly time calculated?

It multiplies your daily hours by 365 to get yearly hours, then divides by 24 to express that as the equivalent number of full 24-hour days.

What does the cost figure mean?

It is an opportunity cost — your screen hours multiplied by the value you assigned to an hour of your time. It is not money spent, but an estimate of what that time could be worth elsewhere.

Is my data sent anywhere?

No. All of the maths runs in your browser and nothing you enter leaves your device.

How many days a year is 3 hours of screen time?

3 hours a day is 1,095 hours a year, which divided by 24 is about 45 full days — roughly a month and a half of round-the-clock screen use.

How should I value an hour of my time?

A common starting point is your hourly wage, but you can use any figure that reflects what your free time is worth to you. The opportunity cost simply scales with the number you choose.

Where do I find my average daily screen time?

Most phones report it under Screen Time on iOS or Digital Wellbeing on Android, usually as a daily average. Enter that figure to see the weekly, yearly and full-day totals.

Screen Time Cost Calculator

Screen time cost calculator

Small daily habits add up. This calculator turns your average daily screen time into weekly and yearly hours, the equivalent number of full days, and an opportunity cost based on what an hour of your time is worth. It is a quick reality check for anyone trying to cut back on their phone or screen use.

How it works

It scales your daily hours across longer periods and converts the yearly total into 24-hour days:

weekly hours = daily × 7 yearly hours = daily × 365 equivalent full days = yearly hours ÷ 24

The opportunity cost multiplies the hours by the value you place on an hour of your time. It is not money you spend, but an estimate of what that time could be worth elsewhere:

yearly cost = daily hours × 365 × hourly value

Example

Three hours a day, valued at £15 an hour:

Period	Hours	Cost
Per day	3	£45
Per week	21	£315
Per year	1,095	£16,425

That 1,095 hours is about 45 full days a year. Seeing the totals laid out makes it easier to decide whether the time is well spent. Everything runs in your browser, so nothing is uploaded.