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Screen Time of Life Calculator

A few hours a day on your phone does not sound like much — until you add it up over a lifetime. Enter your daily screen time and expected lifespan to see the hours per year, the full days per year, and how many waking years of your life you spend looking at a screen (counting from age 12, with 16 waking hours a day).

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1How it is calculated

  1. Calculator A (Daily screen time): hours per day, for example 4.5.
  2. Calculator B (Screen time per year): A × 365 = 1,642.5 hours.
  3. Calculator C (Full days per year): B ÷ 24 = 68.4 days non-stop on a screen.
  4. Calculator D (Expected lifespan): for example 80 years.
  5. Calculator E (Years with a smartphone): D − 12 = 68 years.
  6. Calculator F (Lifetime screen time): B × E = 111,690 hours.
  7. Calculator G (Waking hours per year): 365 × 16 = 5,840 hours.
  8. Calculator H (Waking years on a screen): F ÷ G = 19.1 years.

2Use it with your own numbers

Open the template and every calculator is already set up, named and linked. Change any input and all connected results recalculate instantly. Add extra calculators to extend the calculation, or share the finished workspace with one short link.

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