Miracle Odds Calculator (Littlewood's Law)

The Miracle Odds Calculator applies Littlewood's Law idea: given the odds of a rare event and how many chances you get per day, it estimates how long until it happens. Enter the odds and daily chances.

Formula

Expected days = (1-in-N odds) ÷ Chances per Day
  • Littlewood's Law suggests a person can expect a 'one in a million' event about monthly.
  • This treats each chance as independent with equal odds.

1 in a million, 1000 chances/day

Inputs
  • Odds: 1 in …: 1000000
  • Chances per Day: 1000

1,000,000 ÷ 1,000 = 1,000 days ≈ 2.7 years on average.

Frequently asked questions

What is Littlewood's Law?
The idea that 'miracles' (one-in-a-million events) happen to a person at a rate of about one per month, given how many events we experience.