TL;DR. Converting a price into hours of your life is a borrowed idea, from Vicki Robin and Joe Dominguez in "Your Money or Your Life", and most retellings break it by using your contract hourly rate. The real rate is what you keep after tax and work costs, divided by every hour the job actually takes including the commute. That number is usually a lot lower, which is the whole point. The true cost calculator does the adjustment. It is a good frame for discretionary purchases you are ambivalent about and a genuinely bad one for necessities, care, and anything for your kid.
The price on the tag is denominated in a currency you do not earn.
You earn a thing that is much stranger: hours, minus tax, minus what it cost you to be available for those hours in the first place. The tag says one number. What you actually hand over is a slice of a finite life. Those two quantities are related by an exchange rate almost nobody has calculated.
That is the whole idea, and it is not mine.
Where this comes from
Vicki Robin and Joe Dominguez published "Your Money or Your Life" in 1992. Their framing is life energy: money is what you get for trading hours you will not get back, so a purchase is not really priced in currency, it is priced in life.
It became one of the founding ideas of the financial independence movement, and along the way it got flattened into a party trick: divide the price by your hourly wage, be shocked, share the screenshot.
The flattened version is wrong, and it is wrong in a way that makes it too flattering.
Your hourly rate is not your hourly rate
Three corrections sit between the number on your contract and the number that is true.
Tax. Obvious, universally skipped. You do not spend gross.
The costs the job creates. Commuting, parking, the lunches you buy because you are out, the clothes you own only for work. That money is spent to make earning possible, so it comes off the top before anything is yours.
The hours the job takes but does not pay for. This is the correction that changes the answer. Your working day is not the hours on your timesheet. It is those hours plus the commute both ways, plus the time getting ready, plus, if you are honest, the evening that is technically free but functionally a recovery period. Those hours are gone. They belong to the job. They just do not appear in the divisor anyone uses.
Put the three together and the exchange rate moves a long way.
A worked example, with invented inputs
Every number in this section is invented to show the shape of the calculation. None of it is typical, average, or a claim about anyone.
Say a nominal rate of $30 an hour across 40 paid hours, which is $1,200 gross a week. Take 27% off for an all-in effective tax rate and you keep $876. Subtract $30 a week for the fuel, parking and bought lunches the job creates and you are at $846.
Now the divisor. Five days at 30 minutes each way is five hours of commuting. Half an hour of getting ready per day is another two and a half. So the job claims 47.5 hours a week, not 40.
$846 divided by 47.5 hours is about $17.81 an hour.
The sticker said $30. The truth is a shade under $18, which is roughly 41% lower. Every purchase decision you have made using the $30 figure was made at a discount that does not exist.
The true cost calculator runs exactly this: you pick annual salary or an hourly rate, set paid hours, drag an effective tax slider that spans 10 to 45 percent, and enter your one-way commute, your daily prep time, your work days and your weekly work costs. It then shows the real rate alongside your nominal one and the percentage gap between them. The commute field is pre-filled at 27 minutes and prep at 30, which are just starting values. Replace them with yours.
The same purchase, at both rates
Using the $17.81 real rate from above, and the four quick-fill examples the tool ships with:
| Purchase | At the sticker rate | At the real rate |
|---|---|---|
| $6 coffee | 12 minutes | about 20 minutes |
| $120 shoes | 4 hours | about 6.7 hours |
| $1,000 phone | 33 hours | about 56 hours |
| $45,000 car | 1,500 hours | about 2,500 hours |
The tool shows both columns deliberately: the gap is the size of the illusion.
The bottom row is where the frame stops being a novelty. Two and a half thousand hours, spread across a work day that really costs 9.5 hours of your life, is around 266 working days. More than a year of them. That is not an argument against ever buying a car. It is an argument for knowing which car, and for the fact that the difference between two trim levels is measured in months of your life rather than in a monthly payment that fits.
Small purchases behave differently, and I want to be careful here. Twenty minutes for a coffee is not a scandal. The frame is not an argument that everything is too expensive. It is a unit conversion, and the answer is often fine.
Where small purchases do matter is in aggregate, which is a different calculation, and I ran that one separately in what your vices cost per year.
Where the frame earns its keep
One place, mainly: discretionary purchases you are genuinely ambivalent about.
The upgrade you are not sure you need. The subscription you keep meaning to evaluate. The second version of a thing you already own. In those cases you are stuck because both options feel fine, and converting to hours breaks the tie by changing the unit into one your gut has opinions about. Nobody has intuitions about $340. Most people have immediate intuitions about nineteen hours.
The tool leans into this with a keep-or-skip decision log. You price something, press one of the two, and it holds the last hundred entries with a running total of hours saved by skipping. I like this more than the calculator itself, because it turns a one-off shock into a record, and a record is a thing you can be honest with later.
It also helps with subscription-shaped spending, where an annual cost becomes a standing claim on hours. For that, the better structure is naming the expense and funding it deliberately, which is what sinking funds are for.
Where it becomes corrosive
I want to be blunt about this, because the financial independence corner of the internet is not.
Necessities do not benefit from the conversion. Rent costs hours. So does food. Knowing the number changes nothing except your mood, because the alternative to paying it is not available.
Care is not a purchase. A dentist appointment, a physio session, the thing that stops a small health problem becoming a large one. There is an hours number and it is worthless. Framing care as an expense you might skip is how people arrive at expensive problems later.
Anything for your kid breaks the model entirely. I have a small daughter. The swimming lessons, the shoes she grows out of in four months, the ridiculous plastic thing that made her happy for a week. If I ran those through an hourly conversion I would get a real number and a completely useless one, because I was never trading hours for the object. I was trading them for the reason the object exists.
And there is a failure mode past all of that, which is pricing your entire life in labour units. Once every experience carries an hour tag, you have not become clearer, you have installed a meter that runs during dinner. The frame is a tool you pick up for a specific decision and put down afterwards. If it starts following you around, it has stopped working.
There is also a projection panel applying a fixed 7% assumed annual return over 10, 20 and 30 years. That rate is hard-coded, so read it as an illustration of compounding at a stated rate, not a forecast and not advice.
Everything is formatted in US dollars whatever your currency, and everything stays in your browser.
The version that actually belongs on this site
Here is the move that makes this more than a finance exercise: point the same arithmetic at time you already spend.
You are not only trading hours for money. You are trading hours for hours, constantly, and mostly without noticing. The commute in the calculation above is five hours a week that no purchase decision ever gets attached to. It is simply gone, quietly, at a rate of roughly 250 hours a year.
That is the same conversion, done in the other direction, and it usually lands harder than any price tag. The weeks visualizer is the crudest and most effective way to see it: enter a birth date, adjust the expectancy with the country presets or the eight lifestyle toggles, and the grid shows the weeks behind you against the weeks in front. It also carries an activity breakdown built from population-average estimates baked into the tool, which I would treat as a conversation starter rather than a measurement, and a perspective panel that converts remaining years into things like summers and Christmases.
I argued the whole case for that exercise, including when it does more harm than good, in the 4,000-week piece. I am not going to repeat it here.
The connection is just this: the hours you buy things with and the weeks in that grid are the same substance. Most people will run the conversion on a purchase and never once run it on a standing commitment that eats a Tuesday evening every week for a year. The second one is the bigger number.
What I would actually do with it
- Compute your real hourly rate once, honestly, including the commute and the prep. Write it down.
- Use it only on discretionary things you are already unsure about.
- Log the skips, because the running total is the part that survives.
- Never point it at care, at necessities, or at your family.
- Once a year, point it at a recurring time commitment instead of a purchase, and see whether you still want it.
The exchange rate was always there. Robin and Dominguez just suggested you look at it, and the version worth looking at is the one that includes the drive home.
Last updated: December 2026.
Written by Eusebiu, the solo founder building Loggd in public. I build the app in the evenings around contract work and a small daughter, so my own version of this calculation has an unusually complicated divisor and an easy answer about which hours are non-negotiable. I share what the aggregate data keeps showing on Threads.
The hours you keep are the ones worth tracking. Loggd shows what you actually did with your days as a forgiving contribution grid rather than a streak that punishes one bad week. Start free.
