🔍 Curious Calculators calculators
The fun end of the site. A price tag turned into hours of your working life, a daily habit set against investing it instead, what a thing costs per wear, and how long you would have to work to earn what Elon Musk is worth.
How many years of your life does this purchase cost?
Turn a price tag into hours, days, weeks and years of your working life.
Open calculator →What if you invested $5/day instead of coffee?
See what your coffee habit — or any regular buy — could grow into if the money was invested instead.
Open calculator →Cost per Use Calculator
A $200 pair of boots worn 150 times is $1.33 a wear. Put in what a thing costs and how often you will use it, and see which of your options is really the cheaper one.
Open calculator →Gym Membership Cost per Use
A $20 a week membership going three times a week is $6.67 a visit. Put in what the membership costs at the frequency you pay it, how often you go, and what a casual visit costs at the door.
Open calculator →How long to earn Elon Musk’s net worth?
Put your salary in — in your own currency, with the exchange rate fetched for you — and see how many million years of it would be needed to reach what Forbes reckons he is worth, with the wait measured against the age of the pyramids, the dinosaurs and the universe.
Open calculator →Numbers that stay with you
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What does a gym visit cost?
$20 a week used three times a week is $6.67 a visit. Twice a week it is $10.00 — and if a casual visit costs $15, the membership has to be used 70 times a year to come out ahead.
Work it out: Gym cost per use → -
What does one coffee a day become?
At the page’s own defaults — $5 a day for 30 years at 8% — the habit turns into $228,588, of which $54,750 is money you put in.
Work it out: Coffee vs investing → -
What is a house in working years?
At $35 an hour and a 48-week year, $500,000 is 14,286 hours of work — 7 yrs 10 mos of your life, before a cent of interest.
Work it out: Years of your life → -
What is a billion dollars?
On a $60,000 salary, one billion US dollars is 16,667 years of work — and every billion he gains is another 16,667 years on top.
Work it out: Musk net worth → -
What does a phone cost a day?
A $1,500 phone kept three years is $1.37 a day. A $400 phone replaced every year is $1.10. The flagship costs only 27 cents a day more — which is the whole gap, once a price is divided by the years you keep it.
Work it out: Cost per use →
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