How is the lifetime screen time calculated?

The calculator multiplies your daily screen time hours by 365 days per year, then multiplies by your current age. It also projects future screen time based on average life expectancy of 79 years. The result shows total years spent on your phone over your lifetime.

What is the addiction score and how is it calculated?

The addiction score ranges from 0-100 based on your daily screen time: under 2 hours scores 0-39 (healthy), 2-4 hours scores 40-69 (moderate), 4-6 hours scores 70-89 (high), and over 6 hours scores 90+ (critical). The score also factors in per-app breakdowns for social media usage.

What does waking life percentage mean?

Waking life percentage shows how much of your conscious hours are spent looking at a screen. If you're awake 16 hours a day and spend 8 hours on your phone, that's 50% of your waking life spent on a device — half of all your conscious experience.

Can I save my 7-day challenge progress?

Yes, your daily screen time entries for the 7-day challenge are saved in your browser's local storage. You can close the page and come back later — your progress will still be there.

How is the pie chart breakdown calculated?

The day breakdown pie chart shows how your 24 hours are divided: sleep (default 8 hours), screen time (your input), work/school (default 8 hours), and other (the remaining time). You can adjust sleep and work hours for a more accurate picture.

Screen Time Calculator

See how much of your life you spend on your phone. The numbers might surprise you.

Your Information

Your Age

Daily Screen Time (hours)

Sleep Hours Per Night

Work/School Hours Per Day

Per-App Breakdown (optional)

TikTok (min/day)

Instagram (min/day)

YouTube (min/day)

Snapchat (min/day)

Other (min/day)

Your Lifetime Screen Time

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You'll spend that many years on your phone over your lifetime

Based on average life expectancy of 79 years

Hours per day

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% of waking life

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Books you could read

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Languages you could learn

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Day Breakdown

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Addiction Score (0-100)

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What If I Cut to 1 Hour/Day?

Current lifetime on phone

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If you cut to 1hr/day

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7-Day Screen Time Challenge

Track your daily screen time. Click a day to log your hours.

Frequently Asked Questions

The calculator multiplies your daily screen time by 365 days per year and your current age, then projects forward based on average life expectancy of 79 years. It totals both past usage and projected future usage.

The addiction score ranges 0-100. Under 2 hours daily is healthy (0-39), 2-4 hours is moderate (40-69), 4-6 hours is high (70-89), and over 6 hours is critical (90+). It considers both total and per-app usage.

It shows how much of your conscious waking hours are spent on a screen. If you're awake 16 hours and spend 8 on your phone, that's 50% of your waking life.

Yes, your daily entries are saved in local storage. Close and reopen the page anytime — your data will be there.

These are estimates based on averages. An average book takes about 8 hours to read, and basic fluency in a language takes about 6 months of consistent study. Actual numbers vary by person.