This is for determing how long something will last from now, by simply knowing how old it is. It is based upon the latter of the two forms of an article by J. Richard Gott III:

Gott, Richard, J III. (1993, vol 363). Implications of the Copernican principle for our future prospects Nature pp 315-319
Gott, Richard, J III. (1997, November 15). A Grim Reckoning New Scientist pp. 36-39


50% accuracy
Min. Max.
95% accuracy
Min. Max.
  • Input; the scalar age of something
  • Min.; it will last at least this long
  • Max.; it will last at most this long
  • Recalc.; allows simple recursive calculations.
    Takes an output, and adds it to input.
Note: These calculations are based upon probability. Calculations
for things which are known to have finite age limits such as a
lifespan, will generate unrealistic answers for the Max. values.

Disclaimer: The author shall not be liable for any damages, losses,
or other undesirable happenings incurred through the use of this
calculator or the information it provides.
New recursion behavior, historically it replaced the input value with the calculated value, this calculates an extension of the extension. This is wrong because it violates the presumption of a non-special point in time (it fails to account for the past history in subsequent calculations). It also wasn't intuitive. The new behavior is to add the calculated value to the input. I've also added a small calculation history
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