Lottery Odds Calculator

Curious how slim the path to a jackpot really is? This calculator pins down your exact probability of taking the top prize in Mega Millions or Powerball and lays bare just how long those odds stretch. For context, Mega Millions has you pick 5 numbers from 1 to 70 plus a Mega Ball from 1 to 24 for $5 a play, and Powerball 5 numbers from 1 to 69 plus a Powerball from 1 to 26 for $2.

The engine rests on combinations, written nCr, where 'n' is the pool of numbers available and 'r' is how many you have to match. For Mega Millions and Powerball, it works out the combinations for the main balls, then multiplies by the combinations for the bonus ball since the two draws are independent. The product is the count of unique tickets possible, and your jackpot odds are simply 1 in that figure.

Dreaming is harmless, but extra tickets nudge your odds upward only by a hair while the probability stays vanishingly small. Lucky-number rituals and pattern-picking buy you nothing either, because each draw is independent and fully random, leaving every combination exactly as likely, or unlikely, as the next. One trap worth naming: the odds of winning any prize at all are nowhere near the odds of landing the jackpot, and the two are easy to mix up.