A lens, not a prophecy
Life percentage calculator
of your horizon lived
– weeks lived · – weeks left
The Mac app keeps it on your desktop — moving one dot a week.
What percentage of your life is over?
Divide your age by your horizon and multiply by 100 — that's the whole formula. At 25 on an 80-year horizon you are 31.3% through; at 40, exactly 50%. The calculator above does it to the week from your date of birth, and shows the remainder too, because the remainder is the point. (Looking for the year's percentage instead? That lives on the year progress page, updated live.)
| Age | 70-year horizon | 80-year horizon | 90-year horizon |
|---|---|---|---|
| 20 | 28.6% | 25.0% | 22.2% |
| 25 | 35.7% | 31.3% | 27.8% |
| 30 | 42.9% | 37.5% | 33.3% |
| 40 | 57.1% | 50.0% | 44.4% |
| 50 | 71.4% | 62.5% | 55.6% |
| 60 | 85.7% | 75.0% | 66.7% |
Your exact age in days is on how many days old am I, and to the minute on the age calculator.
Reading the number kindly
A percentage compresses your whole timeline into one figure, which is exactly its power and its danger. Two readings are available. The anxious one: so much is gone. The useful one: look how much remains, and how visible it just became. At 30 years old on an 80-year horizon you are 37.5% through — which means nearly two-thirds of your weeks are still blank dots.
The horizon is an assumption, not a diagnosis — move it between 70 and 100 and watch the number shift; the point survives any setting. For the full picture behind the percentage, the life in weeks calculator draws every week, and the Mac app keeps the figure quietly current on your desktop.
Questions
What percentage of my life is over?
Enter your date of birth and a horizon (80 years by default): the tool shows the exact percentage lived and remaining. It is a lens, not a prophecy — the horizon is yours to move.
How do I calculate my life percentage?
Your age ÷ your horizon × 100. At 30 on an 80-year horizon: 30 ÷ 80 × 100 = 37.5%. The calculator above does it to the exact week from your date of birth — and the quick table below gives common ages at a glance.
Is 72 a good life expectancy?
It is almost exactly the world average — global life expectancy is about 73 years, and India's is about 70. Averages are statistics about populations, not verdicts about you; this tool deliberately treats the horizon as an assumption you can move. For horizons drawn to scale, see the life expectancy calculator.
Can this calculate my lifespan from my date of birth?
No — and no honest calculator can. Your date of birth determines the percentage lived against a horizon you choose; it cannot predict the horizon itself. Tools that claim to compute "your lifespan" from a birth date are dressing an assumption up as a prediction. Ours keeps the assumption visible.
What is the "Life is X% complete" t-shirt about?
Creator Nas Daily made the idea famous by wearing his life percentage on a shirt — a walking reminder that time is finite. The calculator above gives you your own number; the life in weeks calculator draws it as ~4,000 dots if you want the full picture.
What percent of life is spent asleep?
Roughly a third, at 7–8 hours a night. Which makes the waking remainder — the dots still faint on your grid — worth seeing clearly.
Is this morbid?
People expect it to be, and then describe the opposite: the number makes this week feel scarce enough to spend on purpose. That is the entire philosophy of this site.