The 168-Hour Week
Know your true weekly time denominator, then track a week to find where it goes
- Difficulty
- Easy
- Time to result
- ~weeks to results
- Steps
- 4
- Confidence
- 80%
Most people live in days but a week is the truer unit of a life, because a week contains both the typical Tuesday and the typical Saturday. The method starts with a number few people know: there are 168 hours in a week, not just '24-7' left unmultiplied. Once you know the denominator you can compute proportions — a standard 40-hour job plus 56 hours of sleep (8 nights) still leaves 72 discretionary hours, nearly twice the time spent working. To convert that abstraction into insight, track your time for one full week. Most people are surprised: screen time is larger than expected, but the biggest culprit is unaccounted 'nothingness' — hours with no recollection, not memorable or enjoyable, just spent. Seeing the real distribution is the prerequisite for spending time more intentionally.
Origin
Laura Vanderkam's time-tracking method, drawn from studying thousands of people's schedules and detailed in her book 168 Hours.
Core principles
- 01The week, not the day, is the true unit of a life
- 02You can't judge proportions without knowing the denominator
- 03Full-time work leaves far more discretionary time than people assume
- 04Awareness precedes intentional change — track before you optimize
How to run it
- 1
Learn your denominator
Internalize that a week is 168 hours. Most people say '24-7' but never multiply it through, so they have no denominator against which to judge how their time is split.
Pro tip Think in weeks, not days — a week contains both your busy Tuesday and your open Saturday.
- 2
Subtract the fixed blocks
Take out your work and sleep. A 40-hour job plus 56 hours of sleep is 96 hours, leaving 72 hours for everything else — nearly double your working time.
Pro tip Run the numbers yourself; the leftover is usually far larger than 'full-time' makes it feel.
Watch out Don't assume 'full-time' means no time; the label misleads you about the remainder.
- 3
Track a full week
Log your time for one complete week to replace assumptions with data about where the hours actually go.
Pro tip Use built-in awareness tools like the phone's screen-time report or a sleep widget to catch blind spots.
- 4
Find the nothingness
Look for the biggest culprit: stretches of time you can't even describe or remember — not memorable, not enjoyed, just gone. These are the hours to reclaim first.
Pro tip Screens are one source, but unaccounted, unchosen time is usually the larger leak.
Watch out If you don't track, this time stays invisible and you'll keep feeling time-starved.
In the wild
Vanderkam walks through the arithmetic that surprises people: 168 hours in a week, minus a 40-hour full-time job, minus 56 hours of sleep at eight hours a night, leaves 72 hours. That's almost twice as much time as you spend working — yet because the job is called 'full-time,' most people assume there's little left. Knowing the denominator flips the perception from scarcity to surplus.
→ Reframes a 'no free time' complaint into 72 reclaimable hours a week.
Common mistakes
Living in days instead of weeks
A single day is unrepresentative; the week is the true unit because it holds both your typical workdays and weekend days.
Judging time without the denominator
Without knowing there are 168 hours in a week, you can't get an accurate sense of proportion for how much time anything takes.
Is it for you?
Best for
Anyone who feels they have no free time and wants a data-grounded picture before changing their schedule.
Not ideal for
People already tracking time closely or looking for tactics rather than diagnosis.
From the transcript
“Most people don't even know that there are 168 hours in a week... It's 24-7. People say 24-7. They do not multiply it through.”
“If you work 40 hours a week... sleep eight hours a night, so that is 56 hours per week, subtract those from 168, you got…”
From the episode
9 Strategies To Better Control Your Time - Laura Vanderkam - #554
Laura Vanderkam